Explanation:
International standard: An international standard is a set of guidelines, specifications, or measurements that have been agreed upon by a group of countries or international organizations. These standards are typically used to ensure consistency and compatibility in areas such as trade, technology, and safety. International standards are often used to facilitate international trade and communication, and to ensure that products and services meet certain quality and safety requirements.
(ii) Primary standard: A primary standard is a standard that is considered to be the most accurate and reliable standard available for a particular measurement. These standards are typically used as the reference point for all other standards of that measurement. Primary standards are often used in scientific research and in the calibration of other standards.
(iii) Secondary standard: A secondary standard is a standard that is used to calibrate other instruments or standards. It is typically less accurate than a primary standard, but still considered to be of high precision. Secondary standards are often used in industry, research, and other areas where accurate measurements are required, but a primary standard is not practical or cost-effective.
(iv) Working standard: A working standard is a standard that is used in day-to-day operations and is typically less accurate than a secondary standard. It is used to calibrate equipment or instruments that are used in regular operations and it's typically less expensive to use than a secondary standard. A working standard is used to ensure that the equipment is operating correctly and within the acceptable limits of accuracy.
In summary, International standards are agreed upon by a group of countries or international organizations and are used to ensure consistency and compatibility
the equivalent resistance of a circuit with one hundred 100-s resistors all connected in parallel combined with a series resistor of 1 s is ___.
The equivalent resistance of a circuit with one hundred 100-s resistors all connected in parallel combined with a series resistor of 1 s is 0.999Ω.
What is meant by resistor ?
A resistor is an electrical component that controls or restricts how much electrical current can pass across a circuit in an electronic device.A specified voltage can be supplied via resistors to an active device like a transistor.Modern resistors are often constructed from a carbon, metal, or metal-oxide layer.In these resistors, an insulating material is wrapped in a helix around a thin film of conductive (but still resistant) material.A passive electrical component called a resistor prevents the flow of electric current by introducing resistance.They are present in practically all electrical networks and electronic circuits. Ohms are used to measure resistance.To learn more about resistor refer to
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Determine the terminal velocity of the block if the 0.1 mm gap between the block and the surface contains SAE 30 oil at60 °F (µ=0.38 N s/m²). Assume the velocity distribution in the gap is linear, and the area of the block in contact with the oil is 0.1 m²
The terminal velocity of the block if the 0.1 mm gap between the block and the surface contains SAE 30 oil at60 °F is 0.011 m/s.
To calculate the Reynold's Number (Re):
Re = (Vdρ)/μ
where V is the velocity of the block, d is the gap between the block and the surface, ρ is the density of the oil, and μ is the dynamic viscosity of the oil.
Re = (V×0.1×873)/(0.38)
To Calculate the Darcy-Weisbach friction factor (f):
f = 0.0047/Re^0.2
To calculate the terminal velocity of the block:
Vt = [2×f×L×g×ρ]/μ
where L is the length of the block in contact with the oil and g is the gravitational acceleration (9.8 m/s²).
Vt = [2*(0.0047/Re^0.2)×0.1×9.8×873]/0.38
Vt = 0.011 m/s
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a spring is stretched by 35 cm and attached to a 500 g air-track glider, which is then released. the spring does 0.30 j of work on the glider as it returns to its equilibrium length. What is the value of the spring constant?
The value of the spring constant for the spring stretched by 35 cm is 0.000244 J/cm.
To calculate the spring constant, the equation
Work = Force x Distance. The work of the spring (0.30 J) is known, as well as the distance the spring is stretched (35 cm). Therefore, the force is calculated by dividing the work by the distance is 0.0086 erg.
Force = - spring constant x Distance
The force is then divided by the distance the spring is stretched back to its equilibrium position (35 cm) to find the spring constant. The spring constant is the amount of force required to stretch the spring 1 cm. In this example, the spring constant is 0.000244 J/cm.
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The Ejection Seat at Lake Biwa Amusement Park in Japan is an inverse bungee system. A seat with passengers of total mass 160 kg is connected to elastic cables on the sides. The seat is pulled down 12.0 m stretching the cables launch the passengers upward above their starting position at the ground. Assume that the cables are vertical
Part A
Determine the spring constant of the cable
According to the problem the spring constant of the cable is 130 N/m.
What is spring?Spring is a season of renewal and growth that occurs between winter and summer. It is the time of year when plants and animals come back to life and the days become longer and warmer.
The spring constant of the cable can be determined using Hooke's Law, which states that the force exerted by a spring is proportional to the displacement from equilibrium. In this case, the displacement is 12.0 m, so the spring constant is given by:
k = F/x = (160 kg * 9.8 m/s2)/(12.0 m)
= 130 N/m
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men went to the moon by means of a shell shot from a large cannon sunk in the ground. part a what muzzle speed must the cannon have in order for the shell to reach the moon? express your answer to two significant digits and include the appropriate units. activate to select the appropriates template from the following choices. operate up and down arrow for selection and press enter to choose the input value typeactivate to select the appropriates symbol from the following choices. operate up and down arrow for selection and press enter to choose the input value type vshell vshell
The smallest speed at which a moving object, like a rocket, can fly outward into space and escape the gravitational field of a celestial body, such the earth.
How is escape velocity calculated?The smallest speed at which a moving object, like a rocket, can fly outward into space and escape the gravitational field of a celestial body, such the earth.Escape Earth's speed is 2 X 9.8 X 6.4 X 106 m/s or V = (gR) M/s is equal to 11200 M/s, or 11.2 km/s or 7 mph. Consequently, if an object is launched upward from the surface of the earth at a speed of 11.2 km/s, it will be able to escape, or move past the influence of the earth's gravitational field.Egress speed, When anything decelerates faster than gravity weakens, it never returns because gravity weakens more quickly than it does. With the speed of Earth's escape, the object will continue to move away from the planet forever.To learn more about escape velocity refer to:
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Select the correct short description of a real object for which (Figure 1) would be a realistic position-versus-time graphO Eustace the truck driver had a load in a city 120 miles east of El Dorado. He drove west at Gomph for two hours to El Dorado where he spent an hour unloading the truck and loading up front cargo. He then drove backeasta 40gph for two hours to the final de cast of Dorado O Eustace the truck driver had a loadina cy 120 miles east of Dorado. He drove west at 60 mph for two hours to El Dorado where he spent two hours unloading the true and loading up forent cargo. He then drove west at 60 mph for two hours to the final destination 30 miles west of Dorado O Eustace the truck driver had a loadina 120 miles east of El Dorado. He drove west ato mph for two hours to El Dorado where he spent two hours unloading the truck and loading up different cargo. He then drove back cast at 40 mph for two hours to the final de miles east of Dorado O Eustacher had a d a y 120 east of El Dorado e dove where he spent an hour anger and leading up ort cargo. He then drove final destination miles west of El Dorado t ph for two hours Dorado
The constellation Dorado can be found in the southern sky is the correct short description of real object.
Dorado: what is it?
In the southern hemisphere, the constellation Dorado can be seen . One of the 88 constellations that are currently in existence, it was given a name toward the end of the 16th century. The dolphinfish (Coryphaena hippurus), more commonly referred to as dorado in Spanish, is referred to in the name despite being shown as a swordfish. The remaining portion of the Large Magellanic Cloud is in the constellation Mensa, with the majority of the cloud in the constellation Dorado. The South Ecliptic pole can also be found in this constellation.
Astronomers use the Latin genitive form Doradus to name its stars, giving the Spanish name Dorado; Together with the nearby asterism Argo Navis, it is thought to be a feminine proper name of Greek origin that ends in -. like Argo, Io, or Callisto).
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A thin strip of rubber has an unstretched length of14.9 PartAIf it is stretched around a pipe having an outer diameter of 5.0 in., determine the average normal strain in the stripExpress your answer using three significant figures.
We must first compute the length of the strip when it is wrapped around the pipe in order to establish the average normal strain in the strip.
The pipe has an exterior diameter of 5.0 inches, making its circumference:
Circumference = diameter * 5.0 inches * circumference = 15.7 inches
Since the rubber strip is stretched around the pipe, its length when stretched equals the pipe's circumference.
Stretched length equals 15.7 inches
Using the following formula, we can now get the strip's average normal strain:
strain is equal to (length changed / length at start)
strain is equal to (15.7 inches - 14.9 inches)/14.9 inches, which equals 0.0541 or 5.41%.
Therefore, the strip's average normal strain is 5.41%.
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the drawing shows a uniform electric field that points in the negative y direction; the magnitude of the field is 3230 n/c. determine the electric potential difference the following points.
These locations, where the potential difference between Vab and Vcb is 0 and 258v, respectively, have a uniform electric field with a magnitude of 3230 n/c.
The potential difference, also referred to as voltage, is equal to the amount of current multiplied by the resistance. One Joule of energy is consumed by a charge when it moves between two points in a circuit at a potential difference of one Volt. respectively, have a uniform electric field with a magnitude of 3230 n/c. An electric field is a type of physical field that exists around electrically charged particles and which influences the behaviour of all other charged particles nearby (or E-field).
whereas Vcb = E/d = 3230*0.08 = 258v, Vba = E/d = 0
Vba = E/d = 0
Vcb = E/d = 3230*0.08 = 258v
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romeo (85.0 kg) entertains juliet (57.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.70 m away from juliet, who is in the front of the boat. after the serenade, juliet carefully moves to the rear of the boat (away from shore) to plant a kiss on romeo's cheek.
The 80 kg boat moves 0.694 meter towards the shore, if juliet moves towards the romeo.
The mass of the romeo, m₁ = 85 kg
The mass of the juliet, m₂ = 57 kg
The mass of the boat, m₃ = 80 kg
Distance between romeo and juliet, = 2.70 m
If we take the juliet's initial position as a reference point, X₁ = 0
Centre of mass of the boat, X₂ = 2.7/2 = 1.35 m
Distance of romeo from reference point, X₃ = 2.7
Combined centre of gravity of the whole system,
Xₐ = (85×2.7 + 57×0 + 80×1.35)/(85+57+80)
Xₐ = 1.52
After juliet moves romeo, new center of gravity
Xₙ = ((85+57)×2.7 + 80×1.35)/(85+57+80)
Xₙ = 2.214 m
The distance moved by the boat, d = 2.214 - 1.52
d = 0.694 m
--The given question is incomplete, the complete question is:
"romeo (85.0 kg) entertains juliet (57.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.70 m away from juliet, who is in the front of the boat. after the serenade, juliet carefully moves to the rear of the boat (away from shore) to plant a kiss on romeo's cheek. How far does the 80 kg bus move towards the shore it is facing?"
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some of the following circuits violate kvl/kcl and/or basic definitions of two-terminal elements given in section 1.3. for each one of the circuits, determine if it is correct or ill-specified. if it is ill-specified, explain the problem and indicate what will happen if the incorrect circuit has been built up in your real life?
This circuit is ill-specified. It violates KCL, as there is no path for current to flow from the + terminal of the battery, through the resistor, and back to the battery's - terminal. The circuit will not work as expected if it has been built up in real life.
What is violates KCL?Kirchhoff’s Current Law (KCL) states that the sum of all currents entering and leaving a node in an electrical circuit must be equal to zero. This means that the net current entering and leaving the node must be equal to zero. Violating KCL would occur when the sum of all the currents entering and leaving the node is not equal to zero, creating an imbalance in the circuit. This imbalance can lead to circuit malfunction, so it is important to ensure that KCL is not violated.
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when using a wheatstone bridge to measure resistance, values of resistance are used to determine the _____ of the meter circuit.
When using a wheatstone bridge to measure resistance, values of resistance are used to determine the galvanometer of the meter circuit.
What is Galvanometer ?One of the best tools for measuring electrical current is a galvanometer. To determine and quantify the strength and direction of electrical current in circuits, this device is utilised. The working principal of a moving coil galvanometer is that a coil carrying current placed in a magnetic field experiences a torque. The deflection is made sure to be proportional to the current strength by the coil springs and radial field. A galvanometer is not used in an AC bridge because the rotating torque depends on the average current flowing through the galvanometer's coils. However, there will be no average current flowing via the AC bridge. The magnetic field is influenced by the flow of electric current.
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with what tension must a rope with length 3.00 m and mass 0.100 kg be stretched for transverse waves of frequency 42.0 hz to have a wavelength of 0.710 m ? activate to select the appropriates template from the following choices. operate up and down arrow for selection and press enter to choose the input value typeactivate to select the appropriates symbol from the following choices. operate up and down arrow for selection and press enter to choose the input value type t
The equation of a transverse wave traveling on a rope is given by y=10sinπ(0. 01x−2. 000t) where y and x are in cm and t in seconds.
What is transverse waves?
A transverse wave is a wave in which particles move perpendicular to the direction of the wave propagation.A transverse wave is a type of progressive wave. The direction of propagation of a transverse wave is always perpendicular to its direction of vibration. Few specific types of transverse waves can travel through a vacuum. An electromagnetic wave or light wave is an example of a transverse.Hence a transverse wave of this nature is called a shear wave. Since fluids cannot resist shear forces while at rest, propagation of transverse waves inside the bulk of fluids is not possible. In seismology, shear waves are also called secondary waves or S-waves.
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which of the following are the characteristics of grounded theory research? (select all that apply).
In the context of society, it focuses upon experiences or processes. b. It always advances theory. A force in qualitative research is grounded theory research.
What does a force mean in science?The term "force" has a defined meaning in science. A energy is not something an object "has in it" or that it "contains." A force is applied to one item by another. Neither live organisms nor inanimate objects are the only things that can be considered forces.
Who are the units of force?The newton, represented by the letter N, is the Standard unit of force. The metre, a unit of length with the sign m, is one of the fundamental units that relate to force. the kilogram
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An 80 kg astronaut takes a journey from the surface of Earth and lands on the surface of Mars. The acceleration due to gravity on Earth is 9.8 m/s² and
the acceleration due to gravity on Mars is 3.7 m/s².
How does the astronaut's mass and weight on Mars compare to their mass and weight on Earth?
Elimination Tool
Select one answer
A The astronaut's mass and weight on Mars will both be the same as they were on Earth.
B The astronaut's mass and weight on Mars will both be less than they were on Earth.
C The astronaut's weight on Mars will be the same as it was on Earth, but their mass will be less on Mars than it was on Earth.
D The astronaut's mass on Mars will be the same as it was on Earth, but their weight will be less on Mars than it was on Earth.
D) The astronaut's mass on Mars will be the same as it was on Earth, but their weight will be less on Mars than it was on Earth.
An object's mass is a measure of its amount of matter, and is independent of gravity. The astronaut's mass is 80 kg on both Earth and Mars.
Weight, on the other hand, is the force exerted on an object due to gravity and it is equal to the object's mass multiplied by the acceleration due to gravity.
So the weight of astronaut on Earth will be (80 kg)(9.8 m/s²) = 784 N and on Mars (80 kg)(3.7 m/s²) =296 N. As you can see, the weight of astronaut is less on Mars than it was on Earth.
Explanation:
Clearly A bc A is alwthe correct answer
A proton is released from rest inside a region of constant, uniform electric field 1 pointing due north.
29.8 s after it is released, the electric field instantaneously changes to a constant, uniform electric field 2 pointing due south. 7.65 s after the field changes, the proton has returned to its starting point. What is the ratio of the magnitude of 2 to the magnitude of 1? You may neglect the effects of gravity on the proton
Answer:
The ratio of the magnitude of 2 to the magnitude of 1 is 1:1
Explanation:
The proton is released in an electric field pointing due north and, 29.8 seconds later, the field changes to a constant, uniform electric field pointing due south. 7.65 seconds after the field changes, the proton has returned to its starting point.
The proton was initially at rest and the electric field caused it to accelerate. The proton's acceleration is directly proportional to the electric field and inversely proportional to its mass.
The proton is acted on by two fields with opposite direction, which means that the net acceleration is zero. Therefore, the ratio of the magnitude of electric field 2 to the magnitude of electric field 1 is 1:1
The ratio of the magnitude of 2 to the magnitude of 1 is 1:1
Suppose you hold a small ball in contact with, and directly over, the center of a large ball. If you then drop the small ball a short time after dropping the large ball, the small ball rebounds with surprising speed. To show the extreme case, ignore air resistance and suppose the large ball makes an elastic collision with the floor and then rebounds to make an elastic collision with the still-descending small ball. Just before the collision between the two balls, the large ball is moving upward with velocity v
→
and the small ball has velocity -v
→
. (Do you see why?) Assume the large ball has a much greater mass than the small ball.
A. What is the velocity of the small ball immediately after its collision with the large ball?
B. From the answer to part A, what is the ratio of the small ball's rebound distance to the distance it fell before the collision?
We can make a few predictions about the relative velocities prior to and following the impact if kinetic energy and momentum are conserved. Both before and after the impact, the relative velocity is of equal magnitude.
After a collision, how can you determine an object's velocity?If you know the other values of an object's properties, you may determine its momentum or velocity using the momentum equation p = m•v.Despite not being able to move the huge ball very far, the small ball's momentum and velocity will be transferred to it. State the third law of motion of Newton.We can make a few predictions about the relative velocities prior to and following the impact if kinetic energy and momentum are conserved. Both before and after the impact, the relative velocity is of equal magnitude.We can make a few predictions about the relative velocities prior to and following the impact if kinetic energy and momentum are conserved.To learn more about relative velocities refer to:
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According to Charle's law, the volume of the balloon in the freezer will be 35.30 cm³.
What is Charle's law?Charles law is an experimental gas law which provides description about the behavior of gases which tend to expand on heating.It states that, at constant pressure, the temperature is in direct proportion with the volume that is,V∝T or V₁/T₁=V₂/T₂.The relation between volume and temperature is linear as the temperature increases volume also increases.
The graph of volume versus temperature is a straight line passing through the origin.Substitution in formula gives V₂= 40×263/298=35.30 cm³.
Thus, the volume of the balloon in the freezer will be 35.30 cm³.
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kim-lee founded a software development company at the age of 27. over time, he developed the company into a multibillion-dollar transnational organization. he is currently the chief technical officer of the company, holds 75 percent stock of the company, and makes major decisions regarding the products that would be made available to consumers. in the context of wright's model of the u.s. class structure, kim-lee belongs to the . group of answer choices capitalist class small-business class working class managerial class
social mobility, movement of individuals, families, or groups through a system of social hierarchy or stratification.
what is the transnational organization?
Transnational organization is a term used in scholarly literature. It refers to international organizations (usually, international nongovernmental organizations) that "transcend" the idea of a nation-state.Transnational corporations are one of the most important subjects of international economics. They are directly affecting new trends in international business, global competitiveness on international markets as well as economies of states, nations.The primary advantage of a transnational business strategy is that it is less costly than a multi-domestic strategy, as it prioritizes global standardization and efficiency. Transnational businesses centralize as many resources as possible, therefore cutting costs.To learn more about transnational refers to:
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Identify the following ways in which a good psychologist views new and surprising conclusions of research studies.
The ways in which a good psychologist views new and surprising conclusions of research studies are critical thinking and amiable skepticism.
A quality known as amiable scepticism combines openness to ideas and scientific findings with a wariness that arises when the concept is not supported by sound logic or evidence. You need to be a critical thinker if you want to be receptive to friendly scepticism.
The topic of critical thinking is complicated, and there are many multiple interpretations of what it means to analyse or evaluate verifiable facts in a reasonable, sceptical, and objective manner. The capacity to assess data and be conscious of prejudices or preconceptions, including your own, is referred to as critical thinking.
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1000N and pa = 10 ^8 .then find area
Pressure in pa = (total force) x (area)
10⁸ pa = (1000 N) x (area)
Divide each side of the equation by 1000N.
10⁸ pa/1000N = area
area = 10⁵ square meters
predict the order of increasing electronegativity in each of the following groups of elements. (use < symbol to separate substances in the list.)
Electronegativity is a tendency of a atom/element to attract the pair of electrons.
B,O,Gaelectronegativity order = O>B>Ga
Mg,Ba,Caelectronegativity order = Mg>Ba>Ca
Ga,Al,Pelectronegativity order =P>Ga>Al
Al,O,Celectronegativity order =O>C>Al
When an atom of a certain chemical element forms a chemical bond, it has a propensity to draw shared electrons (or electron density). The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity. An atom or a substituent group will draw electrons in greater amounts the higher the associated electronegativity. The sign and amplitude of a bond's chemical polarity, which characterizes a bond along the continuous scale from covalent to ionic bonding, can be quantitatively estimated using electronegativity. The inverse of electronegativity is electropositivity, which describes an element's propensity to accept valence electrons.
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Can anyone help me answer this question?
The density of gold is 19.3 g/cm^3. What is the value in kilogram per cubic meter? Show working.
19.3 gcm3 19.3 g c m 3 is equivalent to 19300 kgm3 due to the decimal place shifting due to the conversion being in metric measurements.
Density: What does that mean?The amount of objects, including people, animals, plants, and other living things, that are present in a region is known as the density. The number of objects is divided by the area to determine density. The number of inhabitants in a nation divided by its size, measured in square kilometers or miles, is the population density of that nation.
In its most basic form, what is density?In reference to the amount of matter contained in a thing, density refers to how much volume the object or substance occupies.
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Part A
Drag words indicating what happens to the first blank and indicating the reason to the second blank.
The video shows a collapsing cloud of interstellar gas, which is held together by the mutual gravitational attraction of all the atoms and molecules that make up the cloud. As the cloud collapses, the overall force of gravity that draws the cloud inward __________________________ because _______________________.
The overall force of gravity that draws the cloud inward increases because the cloud's density increases.
What is gravity?Gravity is a natural phenomenon by which all things with mass are brought toward one another. It is most commonly experienced as the weight of objects pulling them toward the Earth’s center. Gravity is the weakest of the four fundamental forces of nature, yet it is the most dominant force in determining the structure of the universe. It is the reason why planets, moons, and galaxies remain in their orbits. Gravity is also responsible for the formation of stars and planets, as well as the attraction between objects such as planets and moons. The gravity between two objects depends upon their mass and distance between them. Gravity is an important factor in the motion of all objects in the universe and is directly responsible for the tides, the motion of the planets and their motion around the sun.
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A projectile is shot directly away from Earth's surface. Neglect the rotation of Earth.what multiple of Earth's radius R E
gives the radial distance a projectile reaches if (a) its initial speed is 0.500 of the escape speed from Earth and (b) its initial kinetic energy required to escape Earth (c) what is the least initial mechanical energy required at launch if the projectile is to escape Earth
A projectile is shot directly away from Earth's surface.
Find the multiple of Earth's radius that corresponds to the radial distance a projectile travels if its beginning speed is that of the escape speed from Earth and if its initial kinetic energy is that of the kinetic energy necessary to leave Earth using the concept of energy conservation. Energy cannot be created or destroyed, according to the rule of conservation of energy.
(a)In this question, [tex]V_{0}[/tex] = [tex]\sqrt{GM/2R_{E}}[/tex] is known. Using energy-saving techniques, we have
1/2m[tex]v_{0}^{2}[/tex] - GMm/R = -GMm/r
which is going to yield r = 4[tex]R_{e}[/tex]/3. There fore the multiple of [tex]R_{e}[/tex] is 4/3 or 1.33.
(b)Using the equation, we can see that [tex]K_{i}[/tex]= GMm/2[tex]R_{E}[/tex] exists in this issue, and the aforementioned adjustment (which makes use of energy conservation) results in r= 2[tex]R_{E}[/tex] in this instance. [tex]R_{E}[/tex] is therefore a multiple of 2.00.
(c)We may see from (c) that the mechanical energy is equal to zero.
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11.which one of the following graphs represent correctly the variation of maximum kinetic energy emax with the intensity of incident radiations having a constant frequency.
The supplementary diagrams, which represent option d, accurately show how maximum kinetic energy emax varies with intensity of incident radiations with constant frequency.
In physics, kinetic energy (KE) is the energy that an object has as a result of its motion. It is defined as the effort necessary to move a mass-based body from rest to the given velocity. Zero initial velocity is the state where an object is (u). The fundamental types of kinetic energy include electrical, acoustic, thermal, and radiant energy. Here is a quick glance at them. Radiant power is a type of electromagnetic energy. An event's repetitions per unit of time are what determine its frequency.
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rank the work done on the cars to create these changes in velocity. be mindful that the sign of the work value matters in the ra
We can say that forces produce changes in velocity because they alter the direction or speed of an object.
What is the name for an alteration in velocity?When an item alters its velocity, it experiences acceleration.Acceleration is the quantity measuring the speed of change. Acceleration is a vector, much like velocity, and it has both a magnitude and a direction. A car moving straight forward, for instance, is said to have forward (positive) acceleration if it is speeding up and rearward (negative) acceleration if it is slowing down.Things move because of forces. They have the power to initiate motion, as well as to slow down, stop, or reverse the motion of an item in motion. We can say that forces produce changes in velocity because they alter the direction or speed of an object.The complete question is,
Why do velocities change?
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What is the ratio of the magnitude of the electric field at observation point D
to the magnitude of the electric field at observation point C?
The ratio of the magnitude of the electric field at observation point D
to the magnitude of the electric field at observation point C is 16 : 49.
What is electric field?
The electric field strength is the measure of the strength of an electric force per a given unit charge.
E = ( kq ) / ( r² )
where;
k is coulomb's constantr is the distance of the chargeq is the magnitude of the chargeThe position of point c from the center = 4
EC = ( kq ) / ( 4² )
EC = ( kq ) / ( 16 )
The position of point D from the center = 7
ED = ( kq ) / ( 7² )
ED = ( kq ) / ( 49 )
Ratio of electric field at point D to point C is calculated as;
= 16 / 49
= 16 : 49
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using conservation of energy, derive an expression for the velocity of the cart when it is at the top of the neptune sphere in terms of r, r and physical constants as needed.
We can derive the required expression by using the conservation of energy law with the help of potential energy concept. The velocity will be v = √(2gh + 2Fdcos(θ)/m)
The conservation of energy can be used to derive an expression for the velocity of a cart when it is at the top of a Neptune sphere. The total mechanical energy of the cart at the top of the sphere is equal to the initial potential energy of the cart at the bottom of the sphere plus the work done by non-conservative forces, such as friction and air resistance.
The initial potential energy of the cart can be calculated using the equation:
U = mgh
where U is the potential energy, m is the mass of the cart, g is the acceleration due to gravity, and h is the height of the sphere.
The work done by non-conservative forces can be calculated using the equation:
W = Fdcos(θ)
where W is the work done, F is the force acting on the cart, d is the distance traveled by the cart, and θ is the angle between the force and the displacement.
At the top of the sphere, the kinetic energy of the cart, which is given by (1/2)mv^2 where m is the mass of the cart and v is the velocity, is equal to the initial potential energy plus the work done by non-conservative forces.
Therefore, we can write the following equation:
(1/2)mv^2 = mgh + Fdcos(θ)
Solving for v, we get
v = √(2gh + 2Fdcos(θ)/m)
In this expression v is the velocity of the cart when it is at the top of the Neptune sphere in terms of r, r and physical constants as needed. To find the value of velocity we need to know the values of the variables such as mass, height of the sphere, distance traveled, force acting on it and θ, and the acceleration due to gravity.
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Answer these questions please
Atomic theory development, a new model of the atom was created in 1913 by Neils Bohr, a student of Rutherford's.
What progress has been made in the atom model?
According to John Dalton, atoms—which he pictured as little solid balls—are the smallest units of matter. The following concepts were part of Dalton's model: it is impossible to simplify an atom. Every element has the same number of atoms.Atomic theory development, A new model of the atom was created in 1913 by Neils Bohr, a student of Rutherford's. The orbits of the electrons surrounding the nucleus, according to his theory, are circular and concentric. The term "planetary model" refers to this model, which is based on the solar system.Atomic theory development, a new model of the atom was created in 1913 by Neils Bohr, a student of Rutherford's.To learn more about atom model refer to:
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a woodpecker beak has a velocity of 7.49 m/s at impact. if it stops in a distance of 1.87 mm, find the average acceleration of the woodpecker's beak
Answer:
Explanation: Average acceleration = (velocity/distance)
= Convert 1.87 to meters
1.87 / 1000 = 0.00187
(7.49 m/s / 0.00187 m)
= 3987.37 m/s²