A 0.250 kg toy car moving with a speed of .860 m/s collided with a wall. The figure shows the force exerted on the car by the wall over the course of the collision. What is the magnitude of the velocity, or final speed of the car in the collision?
Answers
Answer:
We can use the impulse-momentum theorem to solve this problem, which states that the change in momentum of an object is equal to the impulse applied to it. The impulse is given by the area under the force vs. time graph, which is shown in the figure.
First, we need to find the initial momentum of the car. Since the car is moving only in the x-direction, we can use the equation:
p_initial = m*v_initial
where p_initial is the initial momentum, m is the mass of the car, and v_initial is the initial velocity of the car. Plugging in the given values, we get:
p_initial = (0.250 kg)(0.860 m/s) = 0.215 kgm/s
Next, we need to find the change in momentum of the car, which is equal to the area under the force vs. time graph. We can approximate this area by dividing it into two triangles and a rectangle, as shown in the figure. The total area can be found as follows:
area = (1/2)(20 N)(0.002 s) + (20 N)(0.004 s) + (1/2)(10 N)(0.002 s)
= 0.06 Ns
Finally, we can use the impulse-momentum theorem to find the final momentum of the car, which is given by:
p_final = p_initial + impulse
where impulse is the area under the force vs. time graph. Plugging in the values, we get:
p_final = 0.215 kgm/s + 0.06 Ns = 0.275 kg*m/s
Since the mass of the car doesn't change during the collision, we can use the equation for momentum to find the final velocity of the car:
p_final = m*v_final
Solving for v_final, we get:
v_final = p_final / m = 0.275 kg*m/s / 0.250 kg = 1.1 m/s
Therefore, the magnitude of the velocity, or final speed of the car in the collision, is 1.1 m/s.
Explanation:
a few images below to understand.
Related Questions
he pyramidal motor tract carries signals from the motor cortex of each cerebral hemisphere to side(s) of the spinal cord, whereas the extrapyramidal motor tracts carry signals from various subcortical structures to side(s) of the spinal cord.
Answers
The pyramidal motor tract carries signals from the motor cortex of each cerebral hemisphere to the opposite (contralateral) side of the spinal cord, whereas the extrapyramidal motor tracts carry signals from various subcortical structures to both sides (bilateral) of the spinal cord.
The pyramidal motor tract is responsible for voluntary movement and fine motor control, while the extrapyramidal motor tracts are responsible for involuntary movement, and muscle tone, and the pyramidal motor tract, also known as the corticospinal tract, is a collection of nerve fibers that originates in the motor cortex of each cerebral hemisphere and descends through the brainstem and spinal cord. posture. Both tracts are important for coordinating and controlling motor functions in the body.
To learn more about Pyramidal :
https://brainly.com/question/13961844
#SPJ11
You are sitting on a bus holding a book in your lap. A friend outside the bus watches you move forward, towards the north. Which statement best describes how the book's motion is relative to the frame of reference – you and your friend? You observe the book not moving, but your friend observes it moving north. You and your friend both observe the book moving to the north. Your friend observes the book accelerating south, while you see it standing still. You and your friend observe the book's velocity decreasing.
Answers
You and your friend both observe the book moving to the north. This is because the motion of the book is relative to the frame of reference – you and your friend – and since you are both moving in the same direction.
What is motion?Motion is the process of changing position over time. It is an essential concept in physics, and can be seen in everyday activities, including walking, driving, and throwing a ball. Motion is a relative concept, and is commonly described using concepts such as velocity, acceleration, and displacement. To describe motion, one must include both the direction and the magnitude of the change in position. In the physical sciences, motion is described using the laws of classical mechanics, which are based on Isaac Newton's laws of motion. These laws describe how an object's motion can be affected by forces such as gravity, friction, and tension.
To learn more about motion
https://brainly.com/question/26083484
#SPJ9
callisto, the fourth moon of jupiter, takes 17 days to orbit jupiter. if you could stand on the surface of callisto and see jupiter high in the sky over my head, and then wait 8.5 earth days in the same spot, where would you see jupiter?
Answers
If you were standing on the surface of Callisto, Jupiter's fourth moon, and waited 8.5 Earth days in the same spot, you would see Jupiter in the same position in the sky. This is because Callisto takes 17 days to complete an orbit of Jupiter, and 8.5 days are half of 17 days.
The time it takes Callisto to complete one orbit of Jupiter is 17 days. If a person were standing on the surface of Callisto and saw Jupiter high in the sky above their head, they would observe Jupiter moves during a period of 8.5 Earth days. Here's where they would see Jupiter at the end of the waiting period: Jupiter would appear to have moved to the opposite side of Callisto. The reason for this is that Jupiter's position in the sky depends on the planet's relative location in its orbit around the Sun, as well as the position of the observer. As Callisto orbits Jupiter, the location of Jupiter in the sky over Callisto would change.Learn more about Callisto: https://brainly.com/question/30464364
#SPJ11
Four compasses are placed around a wire, as shown.
A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing in the same direction, west.
The wire is then connected to a battery so that a current flows down the wire.
How will the compasses point once the current is flowing?
A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing in the same direction, west.
A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing in the same direction, east.
A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing clockwise.
A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing counterclockwise.
Answers
Once the current is flowing the compass will show
A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing clockwise
How to find how the compasses pointOnce the current is flowing through the wire, it will generate a magnetic field around it.
The magnetic field will interact with the Earth's magnetic field and cause the compass needles to deflect from their original westward orientation. The direction of deflection will depend on the direction of the current flow in the wire.
Using the right-hand rule, we can determine that the magnetic field around a wire carrying current in the downward direction will have a direction perpendicular to the wire and pointing clockwise when viewed from above. This means that the compass needles will deflect and start pointing in a clockwise direction.
Therefore, the answer is: "A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing clockwise."
Learn more about current at:
https://brainly.com/question/20118982
#SPJ1
Answer:
It's the third one
Explanation:
C.
How does right-hand rule or F=BIL show the relationship between electricity and magnetism?
Answers
Electricity and magnetism are interrelated phenomena, and the right-hand rule provides a way to visualize the relationship between the two.
The right-hand rule (or F=BIL) is a mnemonic device used to show the relationship between electricity and magnetism in a current-carrying conductor. It is based on the observation that when a current-carrying conductor is placed in a magnetic field, a force is exerted on the conductor, causing it to move.
The right-hand rule states that if the thumb of the right hand points in the direction of the current, and the fingers of the right hand curl in the direction of the magnetic field, then the palm of the right hand will face in the direction of the force exerted on the conductor. This relationship is mathematically represented by the equation:
F = BIL
Where:
F is the force exerted on the conductor (newtons)
B is the strength of the magnetic field (teslas)
I is the current flowing through the conductor (amperes)
L is the length of the conductor in the magnetic field (meters)
This equation shows that the force exerted on the conductor is proportional to the strength of the magnetic field, the current flowing through the conductor, and the length of the conductor in the magnetic field.
This relationship between electricity and magnetism can be explained by the fact that an electric current creates a magnetic field around the conductor, and a magnetic field exerts a force on a current-carrying conductor. Therefore, electricity and magnetism are interrelated phenomena, and the right-hand rule provides a way to visualize the relationship between the two.
for such more question on magnetism
https://brainly.com/question/14997726
#SPJ4
Compilation of fashion accessories articles in the Philippines
Answers
HAMMER. It is utilized to fall to pieces of shisha material privately called (aluminum alloy) for simple liquefying. Forceps. It is a hand instrument commonly utilized for twisting and compacting many materials. Texture Paste, WOOLEN YARN, NEEDLE, SCISSORS, HAND Devices, AND Record Apparatuses.
In fashion, an accessory is a thing used to contribute, in an optional way, to a singular outfit. Accessories are much of the time decided to finish an outfit and supplement the wearer's look.[1] They have the ability to additional express a singular's character and character. Accessories come in various shapes, sizes, tones, and so on. The term came into utilization in the twentieth 100 years.
Fashion accessories can be inexactly ordered into two overall areas: those that are conveyed and those that are worn. Generally conveyed accessories incorporate totes and purses, hand fans, parasols and umbrellas, wallets, sticks, and stately blades. Accessories that are worn may incorporate coats, boots and shoes, cravats, ties, caps, hats, belts and suspenders, gloves, muffs, pieces of jewelry, wristbands, watches,[a] eyewear, bands, cloaks, scarves, cords, socks, pins, piercings, rings, and stockings.[1]
The kind of accessory that an individual decides to wear or convey to supplement their outfit is not entirely set in stone by a few elements, including the particular setting of where the individual is going. For instance, assuming an individual will work their decision of accessory would contrast from somebody who is going out to beverages or supper; along these lines relying upon work or play various accessories would be picked. Likewise, a person's conservative status, the strict and social foundation would likewise be a contributing component
to know more about alloy click here:
https://brainly.com/question/1759694
#SPJ4
the complete question is:
what is the Compilation of fashion accessories articles in the Philippines?
These articles discuss a range of issues regarding fashion accessories in the Philippines, such as up-and-coming accessory firms, sustainable fashion, traditional accessories, and styling advice. Individuals with an interest in Filipino fashion, provide knowledge and inspiration.
The fashion accessories industry in the Philippines is vibrant and diverse. These articles provide valuable insights into various aspects of the industry. From emerging accessory brands and local designers making waves globally to sustainable and traditional accessories, there is something for everyone. Style tips and practical advice are also available for those looking to elevate their accessorizing game. The beauty and craftsmanship of locally-made accessories are celebrated, and options for budget-conscious shoppers are provided. These articles showcase the richness and diversity of the Philippine fashion scene and its contribution to the global fashion industry.
learn more about fashion accessories here:
https://brainly.com/question/30809653
#SPJ4
any help will be appreciated!!
The question of why individuals act certain ways has always been of interest to psychologists. Several perspectives have provided different explanations for this question. Describe the primary area of interest for explaining and justifying behavior and the key figures (people) identified for each of the following psychological perspectives.
Psychodynamic:
Behavioral:
Humanistic:
Cognitive:
Answers
Answer:
The question of why individuals act in certain ways has been of interest to psychologists for a long time, and different perspectives have provided various explanations for this question. Below is a brief description of the primary area of interest for explaining and justifying behavior, along with the key figures associated with each of the following psychological perspectives:
Psychodynamic Perspective: The psychodynamic perspective emphasizes the role of unconscious thoughts, feelings, and memories in shaping behavior. The primary area of interest in this perspective is understanding the unconscious conflicts and repressed emotions that influence behavior. The key figures associated with this perspective are Sigmund Freud and his followers.
Behavioral Perspective: The behavioral perspective emphasizes the role of environmental factors in shaping behavior. The primary area of interest in this perspective is the understanding of how external stimuli, rewards, and punishments can shape behavior. The key figures associated with this perspective are Ivan Pavlov, B.F. Skinner, and John B. Watson.
Humanistic Perspective: The humanistic perspective emphasizes the role of personal growth, choice, and free will in shaping behavior. The primary area of interest in this perspective is the understanding of how individuals can fulfill their potential and achieve self-actualization. The key figures associated with this perspective are Abraham Maslow and Carl Rogers.
Cognitive Perspective: The cognitive perspective emphasizes the role of mental processes, such as perception, memory, and thought, in shaping behavior. The primary area of interest in this perspective is the understanding of how individuals process information and make decisions. The key figures associated with this perspective are Jean Piaget, Aaron Beck, and Albert Ellis.
Explanation:
I runner makes one lap around a 1,765m
track an average speed of 441.25 meters a day
How long did it take him?
Answers
Answer:
To find the time, we can use the formula:
time = distance ÷ speed
In this case, the distance is 1,765 meters and the speed is 441.25 meters per minute (not per day, as stated in the question). We need to convert the speed to minutes per lap:
441.25 meters/min = 7.3542 meters/sec
1 lap = 1765 meters
Now we can calculate the time:
time = 1765 meters ÷ 7.3542 meters/sec
time ≈ 240.11 seconds
Therefore, it took the runner approximately 240.11 seconds, or 4 minutes and 0.11 seconds, to complete one lap around the track at an average speed of 441.25 meters per minute.
Explanation:
An object of mass 2 kg is undergoing simple harmonic motion represented by the graph of displacement versus time shown above. If the amplitude of the motion is 3 m, what is the magnitude of the net force on the mass at t=15s?
Answers
The magnitude of the net force on the mass at t=15s is 2.36 N.
What is the net force on the mass?The net force on the mass is calculated by applying Newton's second law of motion as follows;
F (net) = ma
where;
m is the mass of the objecta is the acceleration of the object.The acceleration of a simple harmonic motion can be expressed by the following formula:
a = -ω²x
where:
a = accelerationx = displacement from the equilibrium positionω = angular frequency of the motionIn this formula, the negative sign indicates that the acceleration is opposite in direction to the displacement, which is a defining characteristic of simple harmonic motion.
The angular frequency ω is related to the period T and the frequency f of the motion by the formulas:
ω = 2π/T = 2πf
The frequency of this oscillation is calculated as follows;
when the object makes one complete cycle, the time period = 9 seconds
f = n/T
f = 1/9
f = 0.1 Hz
ω = 2πf
ω = 2π x 0.1 = 0.628 rad/s
The acceleration of the object is calculated as;
a = ω²x
(the displacement, x at 15 s = amplitude of the motion = 3 m)
a = (0.628²) x (3)
a = 1.18 m/s²
The net force on the mass is calculated as;
F (net) = ma
F (net) = 2 kg x 1.18 m/s²
F (net) = 2.36 N
Learn more about net force here: https://brainly.com/question/14361879
#SPJ1
According to the table, these four models all represent molecules. One model is composed of two atoms of the same element. That is model.
ANSWER ASAP PLS
Answers
According to the question, each molecular model in the possibilities has spheres of varying colors and sizes that represent various sorts of atoms.
What is a molecule made up of atoms of two or more distinct elements?A compound is a material composed of atoms or ions of two or more distinct elements linked by chemical bonds to form a molecule.
A molecule is composed of one or more atoms. If they have more than one atom, the atoms can be the same (as in an oxygen molecule), or they can be distinct.
Atoms of the same element have the same color and size, but atoms of other elements do not.
learn more about molecules
https://brainly.com/question/475709
#SPJ1
A capacitor is formed from two identical conducting parallel plates separated by a distance d One plate is charged Q. the other plate is charged -Q. A dielectric slab fills the space between the two plates. Where is the energy stored in this capacitor? A) On the outsides of the metal plates. B) On the insides of the metal plates. C) On the outside su face of the dielectric slab D) Inside the dielectric slab,
Answers
The energy in a capacitor is stored inside the dielectric slab. Therefore, the correct answer is D) Inside the dielectric slab.
A capacitor is a device that stores electrical energy in an electric field. It is made up of two conductive plates separated by a dielectric material. When a voltage is applied across the plates, an electric field is created between them, and the energy is stored in this field.
In the case of the capacitor described in the question, the energy is stored inside the dielectric slab that fills the space between the two plates. This is because the electric field is strongest in the region between the plates, where the dielectric material is located. The energy is stored in the form of an electric field within the dielectric material, and this is where the energy is stored in the capacitor.
To learn more about Capacitor :
https://brainly.com/question/27258294
#SPJ11
What will be the total intensity j of all standard candles integrated over all redshifts? explain why the night sky is of finite brightness even in universes with w ⤠â1/3, which have an infinite horizon distance?
Answers
Answer:
b
Explanation:
ik
you want to make a flashlight using a small bright bulb and a concave spherical mirror. where should you place the light bulb so that the flashlight's beam is as narrow and bright as possible?
Answers
The light bulb should be placed at the focal point of the mirror so that the flashlight's beam is as narrow and bright as possible.
A concave spherical mirror has a curved surface that curves inward, so that it is thinner at the center than at the edges. Light that reflects off a concave spherical mirror is reflected inward towards the focal point of the mirror.
The distance from the mirror to the focal point is called the focal length, which depends on the curvature of the mirror.
When you place the light bulb at the focal point of the mirror, the light rays from the bulb will reflect off the mirror and emerge from the mirror parallel to each other, producing a narrow beam of light. This is because light rays that are parallel to the axis of the mirror are reflected through the focal point.
The beam will also be bright because all the light from the bulb is directed into a narrow beam.
Therefore, to make a flashlight with a narrow and bright beam, you should place the small bright bulb at the focal point of the concave spherical mirror.
To learn more about the 'focal point':
https://brainly.com/question/12653475
#SPJ11
Consider the diagram of a pendulum's motion shown above. A pendulum can be used to model the change from potential energy to kinetic energy and back to potential energy. If you pull the bob back to point A and release it, potential energy is converted to kinetic energy. What do you think happens to the energy at point C?
A Potential energy is converted to kinetic energy.
B Potential energy decreases.
C Kinetic energy increases.
D Kinetic energy is converted to potential energy.
Answers
At point C of a pendulum's motion, kinetic energy is converted back into potential energy.
As the pendulum bob moves upward from the lowest point of its swing, its speed decreases and its potential energy increases. At point C, the pendulum bob has stopped momentarily, so it has no kinetic energy. However, it has gained potential energy as a result of its increased height. As the pendulum bob continues to move upward towards point D, its potential energy will continue to increase, while its kinetic energy decreases.
Therefore, the correct answer is D, Kinetic energy is converted to potential energy.
What is potential energy?
Potential energy is a form of energy that an object possesses due to its position or configuration in a system. It is the energy that an object has because of its position relative to other objects, or because of the forces acting on it.
What is kinetic energy?
Kinetic energy is the energy that an object possesses due to its motion. It is a form of energy that an object has because of its speed and mass. The formula for kinetic energy is:
KE = 1/2 * m * v^2
where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.
To know more about potential energy, visit:
https://brainly.com/question/24284560
#SPJ1
The wheel of an automobile has a radius of 30.0 cm and an axle radius of 10.0 cm. What is its ideal mechanical advantage?
Answers
Therefore, the ideal mechanical advantage of the wheel and axle system in this automobile is 3.
What is force?In physics, force is defined as any influence that causes an object to undergo a change in motion, either by changing its speed, direction, or shape. It is a vector quantity, meaning that it has both magnitude (a numerical value) and direction. Forces can be classified into different types, including contact forces (such as friction, tension, and normal forces) and non-contact forces (such as gravitational, electric, and magnetic forces). The net force acting on an object determines its acceleration, which is described by Newton's second law of motion: F = ma, where F is the net force, m is the mass of the object, and a is the acceleration.
Here,
The ideal mechanical advantage (IMA) of a wheel and axle system can be calculated using the following formula:
IMA = radius of wheel / radius of axle
In this case, the radius of the wheel is 30.0 cm and the radius of the axle is 10.0 cm. Substituting these values into the formula, we get:
IMA = 30.0 cm / 10.0 cm = 3
To know more about force,
https://brainly.com/question/29044739
#SPJ1
In which situation is the principal of cross-cutting relationships useful in determining relative age?
Answers
The principle of cross-cutting relationships is useful in determining relative age in situations where geological features such as faults, and erosion surfaces cut across layers of rock.
By applying this principle, geologists can determine the relative age of the features based on their relationship to the surrounding rock layers. For example, if a fault cuts across a layer of rock, it must be younger than the layer it cuts through. Erosion surfaces that cut across multiple layers of rock can also be used to determine relative age, with the surface being younger than the layers it cuts across.
Overall, the principle of cross-cutting relationships is useful in determining the relative timing of events that have occurred in a geological area.
To know more about cross-cutting relationships, here
brainly.com/question/19550092
#SPJ4
match the silicate structure with the appropriate mineral example. - independent tetrahedra e. single chain - double chain - sheet - network
Answers
Answer:
Independent tetrahedra: Olivine
Single chain: Pyroxene
Double chain: Amphibole
Sheet: Mica
Network: Feldspar
Minerals are naturally occurring substances that form when elements combine in a specific ratio and arrangement. Silicates are the most abundant minerals on Earth and are composed of silicon and oxygen. They are further classified by their structure and the arrangement of their oxygen and silicon atoms.
Independent tetrahedra have silicate tetrahedrons (SiO4) that are not connected. Olivine is an example of this, and is formed from magnesium and iron-rich silicates.
Single chain silicates are composed of linked tetrahedral, forming a single chain. Pyroxene is an example of this, with single chain silicates typically forming as a result of metamorphism or magmatic processes.
Double chain silicates are composed of two connected chains of silicate tetrahedrons. Amphibole is an example of this, and is found in many igneous and metamorphic rocks.
Sheet silicates have silicon and oxygen atoms that are linked in sheets. Mica is an example of this, and can form as a result of chemical weathering of larger silicates.
Network silicates are composed of many tetrahedrons that are linked together in a network. Feldspar is an example of this, and is the most abundant mineral in the Earth’s crust.
Know more about silicates here:
https://brainly.com/question/29560091
#SPJ11
COLOR LOCK-Arrange Letters in an order (First Letter Only - R = Red, B = Blue,
Brown, Black, Y = Yellow, etc. ) (ALL CAPS)
Help
Answers
In alphabetical order the sequence will be: Black, Blue, Brown, Yellow.
Character strings are arranged according to their positions in the traditional alphabetical ordering using the alphabetical order method. It is one of the sorting techniques. Lexicographical ordering in mathematics is the extension of alphabetical ordering to other data categories, such as number sequences or other ordered mathematical objects.
The alphabetical order is typically known as a lexicographical order when applied to strings or sequences that may also contain digits, numbers, or more complex kinds of elements.
To know more about alphabetical order go through:-
https://brainly.com/question/26971639
#SPJ4
Rearranging the letters in COLOR LOCK while assigning colors based on their first letter yields the sequence COKLORC.
Assigning colors based on the first letter of each letter in COLOR LOCK results in the following sequence: COKLORC. The first letter "C" can be assigned to the color cyan, which is a combination of blue and green. The letter "O" can be assigned to the color orange, which is a warm color made from a mix of red and yellow. The letter "K" can be assigned to the color black, which is a classic and versatile hue. The second "L" can be assigned to the color lavender, which is a light shade of purple. The "O" can be assigned to the color olive, which is a yellowish-green hue. The letter "R" can be assigned to the color red, which is a vibrant and energetic color. Lastly, the letter "C" can be assigned to the color cyan once again.
learn more about Rearranging here:
https://brainly.com/question/29668964
#SPJ4
A radio waves transmitted from a certain radio station is represented by the wave equation: y=0.75 sin〖(0.67πx-2×10^8 πt)〗
Calculate the (i) wavelength of the wave (ii) frequency of the wave (ii) velocity of the wave. Where x, y are in meters while t is in seconds
Answers
The frequency of a wave is the number of times a wave passes a point in a given amount of time. It is calculated by the formula: f = v/λ, where v is the velocity of the wave and λ is the wavelength of the wave.
What is velocity?Velocity is a vector quantity that measures the rate and direction of an object's change in position over a specific period of time. It is the rate at which an object moves from one point to another, expressed as distance over time. Velocity is commonly expressed in meters per second (m/s) or kilometers per hour (km/h). Velocity is a fundamental concept in physics and is often used to calculate other physical quantities such as force, acceleration, momentum, and kinetic energy. Velocity is a crucial element in the study of motion and is related to the concepts of speed, displacement, and acceleration.
In the given equation, y = 0.75 sin〖(0.67πx-2×10^8 πt)〗
(i) Wavelength: The wavelength of a wave is the distance between two consecutive points of a wave. It is calculated by the formula: λ = v/f, where v is the velocity of the wave and f is the frequency of the wave.
In the given equation, y = 0.75 sin〖(0.67πx-2×10^8 πt)〗
We know that, v = λf
So,
λ = v/f = (2×10^8 πt)/0.67π
= 3×10^7 t
Therefore, the wavelength of the wave is 3×10^7 t meters.
To learn more about velocity
https://brainly.com/question/29223620
#SPJ9
4. QUESTIONS
The tapered springs obey Hooke's over the widest range of loads when suspended with the large
diameter end down. This is why they are made that way. Explain why this works.
Answers
Tapered springs are designed to be load-bearing structures that can store and release mechanical energy in response to applied forces or loads.
When a tapered spring is suspended with the large diameter end down, it experiences a compressive force due to gravity.
Mechanical energy refers to the energy that an object possesses due to its motion or position. Mechanical energy is conserved in a closed system, meaning that it can neither be created nor destroyed. The formula for kinetic energy is KE = 1/2mv², where m is the mass of the object and v is its velocity.
There are various forms of potential energy, such as gravitational potential energy, elastic potential energy, and chemical potential energy. The formula for gravitational potential energy is PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object above a reference point.
To learn more about Mechanical energy visit here:
brainly.com/question/14688403
#SPJ4
Krystal throws a rappelling rope at a speed of 10 m/s down a 50 m cliff. when will the rope hit the ground? use the drop-down to put the correct order to solve for when the rope will hit the ground. question 2 options: the rope will hit the ground in about 4.37 s.
Answers
The rope will hit the ground in about 4.37 seconds.
With the help of the kinematic equation, we can resolve this issue:
[tex]d = vit + 1/2at^2[/tex]
where:
d = 50 m (distance or height of the cliff)
vi = 10 m/s (initial velocity)
a = [tex]9.8 m/s^2[/tex] (acceleration due to gravity, pointing downwards)
t = ? (time to hit the ground)
Solving for t:
[tex]50 = 10t + 1/2(9.8)t^2[/tex]
[tex]0 = 4.9t^2 + 10t - 50[/tex]
[tex]t = (-10+ \sqrt{(10^2 - 4(4.9)(-50))) / (2(4.9)} )[/tex]
[tex]t = 4.37 s[/tex]
Therefore, the rope will hit the ground in about 4.37 seconds.
for such more question on kinematic equation
https://brainly.com/question/24458315
#SPJ4
9. Kinetic molecular theory postulates are written for ideal gas behavior. In reality, gases to not behave ideally. For example, water molecules are polar and create surface tension through hydrogen bonds, even in vapor form. This explains why clouds are formed. Which postulate of the kinetic molecular theory is untrue for the formation of clouds?
Answers
The frequency of wall contacts and thus the pressure of the gas increase as the number of gas particles in the container rises.
How does the kinetic theory of molecules explain how ideal gas molecules behave?The kinetic molecular theory of gases explains how ideal gases behave. Pressure is explained by molecular motion, which causes collisions between molecules and the container walls. Gases' great compressibility is explained by the enormous intermolecular distances between their molecules.
Which kinetic molecular theory postulate explains the fact that a gas's pressure rises as its temperature does?Charles' rule. Only by increasing the volume the gas occupies can a steady pressure be maintained while the temperature of the gas rises.
To know more about frequency visit:-
brainly.com/question/3795295
#SPJ1
car wheel of radius 0.25 m has a linear acceleration of 1.75 m/s2
. Calculate the
angular acceleration of wheel.
Answers
The angular acceleration of the car wheel is 7.0 rad/s².
How to calculate angular acceleration?We can relate the linear acceleration a and the angular acceleration α of a rotating object through the equation:
a = rα
where r is the radius of the rotating object. In this case, the radius of the car wheel is 0.25 m and the linear acceleration is 1.75 m/s². Substituting these values into the equation:
1.75 m/s² = (0.25 m) α
Solving for α:
α = 1.75 m/s² / 0.25 m = 7.0 rad/s²
Therefore, the angular acceleration of the car wheel is 7.0 rad/s².
Learn more on angular acceleration here:
#SPJ1
Rough Surface with: Ms = 0. 8 HK = 0. 4
(a) Find the magnitude of the
force F needed to prevent the
book from sliding down the
rough wall.
F
M = 1. 5 kg
600
(b) Find the minimum force F
needed to set the book in
motion up the rough wall with
constant velocity
Answers
a) The magnitude of the force F needed to prevent the book from sliding down the rough wall is 6 N.
b) The minimum force F needed to set the book in motion up the rough wall with constant velocity is 6 N, which is equal to the force of friction acting on the book.
a) To find the magnitude of the force F needed to prevent the book from sliding down the rough wall, we need to consider the forces acting on the book. There are two forces acting on the book: the force of gravity, which pulls the book downward with a force of mg = (1.5 kg)(9.81 m/s^2) = 14.715 N, and the force of friction, which acts in the opposite direction of motion.
The force of friction can be calculated using the formula:
f = μN
where μ is the coefficient of friction (js = 0.8), and N is the normal force acting perpendicular to the surface of the wall. Since the wall is at an angle of 60 degrees to the horizontal, the normal force can be calculated as:
N = mg cos θ = (1.5 kg)(9.81 m/s^2) cos 60° = 7.5 N
Substituting the values, we get:
f = μN = (0.8)(7.5 N) = 6 N
Since the book is not moving, the force F acting on it must be equal and opposite to the force of friction, i.e., F = f = 6 N.
Therefore, the magnitude of the force F needed to prevent the book from sliding down the rough wall is 6 N.
b) To find the minimum force F needed to set the book in motion up the rough wall with constant velocity, we need to consider the forces acting on the book again. Since the book is moving with constant velocity, the net force acting on it must be zero. Therefore, the force of friction must be equal and opposite to the force F applied to the book.
The force of friction can be calculated as before, using the formula:
f = μN = (0.8)(7.5 N) = 6 N
To find the minimum force F needed to set the book in motion up the wall, we need to overcome the force of friction. Therefore, we need to apply a force greater than or equal to the force of friction. If we apply a force slightly greater than 6 N, the book will start moving up the wall with an acceleration
Learn more about force of friction here
brainly.com/question/8935141
#SPJ4
The given question is incomplete, the complete question is:
Rough Surface with: js = 0.8 HK = 0.4 (a) Find the magnitude of the force F needed to prevent the book from sliding down the rough wall m= 1.5kg , θ=60degree b)Find the minimum force F needed to set the book in motion up the rough wall with constant velocity
The term associated with such strange hypothetical scenarios is ""Maxwell’s demon. "" Imagine this randomly weird world for a minute. Then describe something that would make it very difficult (or at least interesting) to live in a Maxwell’s-demon world. Also explain why you think these strange events don’t happen on a random basis in real life
Answers
In a Maxwell's-demon world, physical processes would be unpredictable, making it difficult to live. However, these strange events don't occur randomly in reality due to the second law of thermodynamics, ensuring predictability and consistency in physical processes.
In a Maxwell's-demon world, where the second law of thermodynamics is violated, it would be very difficult to live if physical processes were unpredictable and inconsistent. For example, if a person couldn't predict the behavior of objects or if the laws of physics randomly changed, it would make it nearly impossible to live in such a world. This would be because the everyday processes and technological devices we rely on wouldn't work consistently, leading to chaos and unpredictability.
These strange events don't happen on a random basis in real life because of the second law of thermodynamics, which states that entropy in a closed system can only increase or remain constant over time. Thus, it is impossible for a system to continuously extract work without a corresponding increase in entropy. Real-life systems are subject to this law, leading to predictability and consistency in physical processes.
Learn more about thermodynamics here: brainly.com/question/1368306
#SPJ4
In 1912, Alfred Wegener proposed his continental drift theory and was widely rejected. Imagine if you had to assist Wegener in proving that we live on huge plates that are constantly in motion. Luckily, you also have provided resources such as videos and articles to compile your evidence and help Wegener. Present your research using an interactive PowerPoint or Storyboard while answering the below questions.
1. What does the theory of plate tectonics state?
2. What was Pangaea?
3. Why was Wegener's original idea about continental drift referred to as intuition and not science?
4. What did Wegener find that he believed was evidence to support his theory?
Evidence for plate tectonics
Research the evidence that scientists used to prove the theory that continents move.
Research rock formation evidence and give examples.
Research fossils evidence
o Research fossil evidence of the following organisms: Glossopteris, Mesosaurus, Cynognathus and Lystrosaurus. Summarize the type of organisms, their habitat and climate conditions.
5. Research evidence from glaciers and coal deposits.
Answers
Answer:
1. The theory of plate tectonics states that the Earth's outer shell is divided into several plates that move and interact with each other. These plates are made up of the Earth's crust and the upper part of the mantle, and they move due to the convection currents in the mantle.
2. Pangaea was a supercontinent that existed about 300 million years ago. It was made up of all the continents that we know today, and it began to break apart about 200 million years ago.
3. Wegener's original idea about continental drift was referred to as intuition and not science because he did not have a mechanism to explain how the continents moved. Additionally, he did not have enough evidence to support his theory.
4. Wegener found several pieces of evidence that he believed supported his theory of continental drift. He noticed that the coastlines of South America and Africa fit together like puzzle pieces, and he also found similar rock formations and fossils on both continents.
Evidence for plate tectonics:
Rock formation evidence: Scientists have found similar rock formations on different continents that were once connected. For example, the Appalachian Mountains in North America and the Caledonian Mountains in Europe have similar rock formations.
Fossil evidence: Scientists have found fossils of the same species on different continents that were once connected. For example, the Glossopteris plant was found in South America, Africa, India, Australia, and Antarctica. This suggests that these continents were once connected and had similar climates.
Glossopteris: Glossopteris was a plant that lived about 250 million years ago. It was found on several continents that were once connected, including South America, Africa, India, Australia, and Antarctica. This suggests that these continents were once connected and had similar climates.
Mesosaurus: Mesosaurus was a freshwater reptile that lived about 300 million years ago. Its fossils have been found in South America and Africa, which suggests that these continents were once connected and had similar habitats.
Cynognathus: Cynognathus was a carnivorous mammal-like reptile that lived about 250 million years ago. Its fossils have been found in South America, Africa, and Antarctica, which suggests that these continents were once connected and had similar habitats.
Lystrosaurus: Lystrosaurus was a herbivorous mammal-like reptile that lived about 250 million years ago. Its fossils have been found in South America, Africa, India, and Antarctica, which suggests that these continents were once connected and had similar habitats.
Glacier and coal deposit evidence: Scientists have found evidence of glaciers and coal deposits in areas that are now near the equator. This suggests that these areas were once located near the poles and have moved due to plate tectonics. Additionally, coal deposits found in Antarctica suggest that it was once located in a warmer climate.
(PLS HELP!!!) Meadow voles are small mouse-like animals that eat plants and insects. Their niche in an ecosystem is a
A.
omnivore.
B.
herbivore.
C.
producer.
D.
scavenger.
Answers
Their niche in an ecosystem is a B. herbivore.
Define about the ecosystem ?
An ecosystem is a community of living organisms and their physical environment, interacting as a system. It can be as large as a whole forest or as small as a puddle of water.
An ecosystem is composed of both biotic factors (living things) and abiotic factors (non-living things).
Examples of biotic factors include plants, animals, and microorganisms, while abiotic factors include things like water, air, temperature, and soil. These factors interact with each other in complex ways, such as through food chains and nutrient cycling, to maintain the overall balance of the ecosystem.
Ecosystems can be found in many different environments, including deserts, oceans, forests, and grasslands, and each one has its own unique set of organisms and interactions.
To learn more about ecosystem follow the given link: https://brainly.com/question/24155138
#SPJ1
Why is it not zero? How did they solve it
Answers
Answer:
The cone contains no charge.
Flux in = Flux out
Flux In = π R^2 E A = 471 N/C m^2
which would be the most efficient manner in which to lift a heavy box? turn side to box and lift with one arm grasp box at arms length place one hand under box and one hand on top at arms length face box with elbows bent and arms close to body
Answers
The most efficient manner in which to lift a heavy box is to face the box with elbows bent and arms close to the body.
What is efficiency? Efficiency is the ratio of useful work done by a device to the total energy expended or heat consumed. Efficiency is a measure of the effectiveness with which a device does work.
In order to lift a heavy box, a certain posture must be maintained. Following is the correct way to lift a heavy box:
Face the box with elbows bent and arms close to the body.
Lifting a heavy box with proper posture is important for preventing injury. To lift a heavy box with proper posture, stand as close as possible to the box, feet hip-width apart, and squat down by bending the hips and knees. Once the arms are securely wrapped around the box, use the legs to lift the box off the ground, keeping the back straight and the box as close to the body as possible. This posture prevents the back from rounding, which can cause spinal injuries, and it also enables the arms and legs to work together, distributing the weight of the box more evenly. This posture is the most effective way to lift a heavy box, and it is essential to follow it to avoid injury.
To learn more about force refer to: brainly.com/question/12970081
#SPJ11
A heart dysfunction that can cause death is ventricular fibrillation. This is an uncoordinated quivering of the heart as opposed to regular beating. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of several microfarads, charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart, their handles are insulated to prevent injury to the operator, who calls clear and pushes a button on one paddle to discharge the capacitor through the patients chest.
assume that the capacitor in the defibrillator is 10 uF and is charged to 5,000 volts.
a. how much charge is stored in the capacitor before it is discharged?
b. how much energy is released when the capacitor is discharged?
c. if the capacitor completely discharges in 2.5 ms, what is the average current delivered by the defibrillator?
d. what is the average power delivered?
Answers
The correct answer to all questions about the defibrillator are: a) Q= 50 μC b) E= 125J c) I= 20A d) P= 50kW
A defibrillator is a device that is used to apply a strong electric shock to the chest in order to restart the heart in case of ventricular fibrillation.
The device contains a capacitor that is charged to a certain voltage and is then discharged through the patient's chest using electrodes called paddles.
a. The charge stored in the capacitor before it is discharged can be calculated using the formula Q = C * V, where Q is the charge in coulombs, C is the capacitance in farads, and V is the voltage in volts.
In this case, the capacitance is 10 μF or 10 * 10^-6 F, and the voltage is 5,000 V. Therefore, the charge stored in the capacitor is:
Q = 10 * 10^-6 F * 5,000 V = 50 * 10^-3 C = 50 μC
b. The energy released when the capacitor is discharged can be calculated using the formula E = 1/2 * C * V^2, where E is the energy in joules, C is the capacitance in farads, and V is the voltage in volts.
In this case, the capacitance is 10 uF or 10 * 10^-6 F, and the voltage is 5,000 V. Therefore, the energy released is:
E = 1/2 * 10 * 10^-6 F * (5,000 V)^2 = 125 J
c. The average current delivered by the defibrillator can be calculated using the formula I = Q / t, where I is the current in amperes, Q is the charge in coulombs, and t is the time in seconds.
In this case, the charge is 50 μC or 50 * 10^-3 C, and the time is 2.5 μs or 2.5 * 10^-3 s. Therefore, the average current delivered is:
I = 50 * 10^-3 C / 2.5 * 10^-3 s = 20 A
d. The average power delivered by the defibrillator can be calculated using the formula P = E / t, where P is the power in watts, E is the energy in joules, and t is the time in seconds.
In this case, the energy is 125 J, and the time is 2.5 μs or 2.5 * 10^-3 s. Therefore, the average power delivered is:
P = 125 J / 2.5 * 10^-3 s = 50,000 W or 50 kW
To know more about defibrillator, refer here:
https://brainly.com/question/30434883#
#SPJ11