The student needs a thermometer to measure the change in temperature of the copper block. Therefore, the answer is thermomter and watch.
Option D is correct.
What is a thermometer?A thermometer is described as a device that measures temperature or a temperature gradient.
An instrument that measures temperature is a thermometer.
It is able to gauge the temperature of solids like food, liquids like water, and gases like air. Celsius, Fahrenheit, and kelvin are the three most popular temperature measuring units.
The metric system includes the Celsius scale.
Learn more about thermometer at: https://brainly.com/question/2339046
#SPJ1
Which describes an effect of recycling?
A
Recycling decreases land usage.
B
Recycling increases pollution.
C
Recycling stops land from being used.
D
Recycling increases land usage.
Answer: A
Explanation:
which is the most likely reason that paper clip y does not move toward the magnet? responses paper clip y is not magnetic like paper clip z. paper clip y is not magnetic like paper clip z. paper clip y is outside of the magnetic field produced by the nail. paper clip y is outside of the magnetic field produced by the nail. paper clip y is not light enough to be pulled by the electromagnet. paper clip y is not light enough to be pulled by the electromagnet. paper clip y is being repelled by the electromagnet.
The most likely reason that paper clip y does not move toward the magnet is paper clip y is outside of the magnetic field produced by the nail. The correct option to this question is C.
Effect of magnetThe paper clip's steel acts as a magnet, and as you move the magnet along it, it pulls on each domain and moves the north and south poles so that the majority of them point in the same way. Thus, the paperclip becomes magnetic.Items made of steel, iron, cobalt, and nickel are drawn to magnets. Since galvanized steel wire is typically used to make paperclips, they are magnetic.The magnetic field affects the clip. The clip will be drawn toward the magnet by the magnet's magnetic field.Objects are pulled or pushed by magnetic forces, which are non-contact forces. Few magnetic' metals, and not all matter, are drawn to magnets. Magnets are both drawn to and drawn away from other magnets.For more information on magnetic field kindly visit to
https://brainly.com/question/30830611
#SPJ1
Complete question :
which is the most likely reason that paper clip y does not move toward the magnet? responses
A. paper clip y is not magnetic like paper clip z.
B. paper clip y is not magnetic like paper clip z.
C. paper clip y is outside of the magnetic field produced by the nail. paper clip y is outside of the magnetic field produced by the nail.
D. paper clip y is not light enough to be pulled by the electromagnet.
E. paper clip y is not light enough to be pulled by the electromagnet.
F. paper clip y is being repelled by the electromagnet.
38. Which one of the waveforms shown below is the
resultant waveform?
The resultant waveform is in the picture is y1
What is superposition of wavesSuperposition of waves is a phenomenon that occurs when two or more waves travel through the same medium and combine together to form a new wave.
When waves superpose, their amplitudes and frequencies add up or cancel out at different points in space and time, resulting in a complex pattern of constructive and destructive interference.
The principle of superposition is a fundamental concept in physics and is used to describe many wave phenomena, such as interference, diffraction, and standing waves. It states that when two or more waves overlap in space, the resultant wave at any given point is the algebraic sum of the individual waves at that point.
Learn more about waveforms at
https://brainly.com/question/24224027
#SPJ1
18. how long does the eclipse of an earth-like planet take? how much time passes between eclipses? what obstacles would a ground-based mission to detect earth-like planets face?
The duration and frequency of eclipses on an Earth-like planet depend on its orbit and the orbit of its moon(s).
However, on average, a total solar eclipse could last for a few minutes to a few hours, and the time between eclipses could be a few months to a few years. Obstacles for the ground-based detection of the Earth-like planets include atmospheric interference, limited resolution, and the brightness of the host star relative to the planet. Additionally, Earth-like planets are often located far away and are small compared to their host stars, making them challenging to detect using the current technology.
To know more about eclipses, here
brainly.com/question/4279342
#SPJ4
If a spacecraft is moving at 20,000 mph (in space), it will continue to move at 20,000 mph when its engines shut off.
Which Law explains this?
Choose matching definition
Newton's first law of motions
All of these
Fruitfulness
scope
testability
Sum to you equal weight
If a spacecraft is moving at 20,000 mph (in space), it will continue to move at 20,000 mph when its engines shut off.
The law that explains this is Newton's first law of motion.
Newton's first law of motion, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will continue in motion with the same speed and direction, unless acted upon by an external force.
In the case of the spacecraft moving at 20,000 mph, it will continue to move at that speed when its engines shut off, because there are no external forces acting upon it in the vacuum of space.
To know more about Newton's first law of motion:
https://brainly.com/question/974124
#SPJ11
a 409-kg satellite is in circular orbit around the earth and moving at a speed of 1.29 km/s. how much work must be done to move the satellite into another circular orbit that is twice as high above the surface of the earth?
To move the satellite into another circular orbit, we need to change its velocity. The amount of work required can be calculated using the formula:
Work = (1/2) x mass x (final velocity^2 - initial velocity^2)
Here, the initial velocity is 1.29 km/s, and the mass of the satellite is 409 kg. Let's assume that we want to move the satellite into a higher circular orbit with a velocity of 1.5 km/s.
Work = (1/2) x 409 kg x (1.5 km/s)^2 - (1.29 km/s)^2)
Work = (1/2) x 409 kg x (2.25 km^2/s^2 - 1.6641 km^2/s^2)
Work = (1/2) x 409 kg x 0.5859 km^2/s^2
Work = 119.96 kJ
Therefore, we need to do approximately 119.96 kJ of work to move the satellite into another circular orbit with a velocity of 1.5 km/s.
To know more about Work done :
https://brainly.com/question/30867543
#SPJ11
A plane lands on the runway and slows from 758 km/sec to 30 km/sec in 48 seconds, what is the plane’s acceleration?
The acceleration of the plane is: -55,090 km/(hour)²
What is an acceleration?
The initial velocity of the plane (758 km/sec) is much greater than the maximum possible speed of an airplane. It is possible that the initial velocity was meant to be 758 km/hour instead.
Assuming that the initial velocity was meant to be 758 km/hour and final velocity is 30 km/hour, the acceleration of the plane can be calculated using the formula:
acceleration = (final velocity - initial velocity) / time
Here, final velocity = 30 km/hour, initial velocity = 758 km/hour, and time = 48 seconds converted to hours is 48/3600 = 0.01333 hours.
Therefore, the acceleration of the plane is:
acceleration = (30 - 758) / 0.01333
acceleration = -55,090 km/(hour)²
The negative sign indicates that the plane is decelerating or slowing down. However, this answer seems unlikely as the acceleration is very high and may not be possible for an airplane to achieve. It is possible that the initial velocity was meant to be a lower value.
What is velocity?
Velocity is a physical quantity that describes the rate of change of an object's position with respect to time. It is a vector quantity, meaning it has both magnitude (speed) and direction.
In other words, velocity is the speed of an object in a particular direction. For example, a car moving at 60 km/hour to the east has a velocity of 60 km/hour to the east.
Velocity can be calculated as the change in position divided by the change in time:
velocity = change in position / change in time
The standard unit of velocity is meters per second (m/s) in the SI system, but it can also be expressed in other units such as kilometers per hour (km/hour) or miles per hour (mph).
To know more about velocity, visit:
https://brainly.com/question/2777725
#SPJ1
Complete question is: A plane lands on the runway and slows from 758 km/sec to 30 km/sec in 48 seconds, The acceleration of the plane is: -55,090 km/(hour)².
you buy a lava lamp from the store. as the lamp heats up, blobs of liquid rise to the top then sink back down to the bottom. this process continues because of:
"You buy a lava lamp from the store. as the lamp heats up, blobs of liquid rise to the top then sink back down to the bottom. this process continues." The process described in a lava lamp occurs because of differences in density, buoyancy, and convection.
As the lamp heats up, the blobs of liquid (usually wax) inside become less dense and rise to the top due to buoyancy. Once they reach the top and cool down, their density increases, causing them to sink back down. This cycle of rising and sinking continues as convection currents are formed in the liquid, creating the mesmerizing movement you see in a lava lamp.
More on lava lamp: https://brainly.com/question/30087758
#SPJ11
If the Law of Conservation of Momentum is true, then how does the total momentum before a collision compare to the total momentum after a collision?
Answer:
According to the Law of Conservation of Momentum, the total momentum of a closed system remains constant before and after a collision. This means that the total momentum before a collision is equal to the total momentum after the collision.
In other words, the total momentum of all the objects involved in a collision, such as two colliding balls or two vehicles crashing, will be the same before and after the collision, assuming no external forces are acting on the system. Momentum is a vector quantity that depends on the mass and velocity of an object, and it is conserved in the absence of external forces.
This principle of conservation of momentum is a fundamental concept in physics and is widely used in analyzing and predicting the outcomes of collisions in various scientific and engineering applications, such as in physics, engineering, and transportation safety.
Thank you for asking! :D
fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to truthfully report the mass). what is the force constant of the spring in such a scale if it the spring stretches 8.30 cm for a 12.5 kg load?
The force constant of the spring in such a scale if it the spring stretches 8.30 cm for a 12.5 kg load would be 1479.28N.
To determine the force constant of the spring in the fisherman's scale, we can use Hooke's law, which states that the force applied to a spring is directly proportional to the amount it is stretched.
The formula for Hooke's law is F = -kx, where F is the force applied, k is the force constant of the spring, and x is the displacement of the spring from its equilibrium position.
In this case, we know that the spring stretches 8.30 cm (or 0.0830 m) for a load of 12.5 kg.
We can convert this to force using the formula
F = mg, where m is the mass of the object and g is the acceleration due to gravity[tex](9.81 m/s^2).[/tex]
Therefore,[tex]F = (12.5 kg)(9.81 m/s^2) = 122.63 N[/tex].
Using Hooke's law, we can rearrange the equation to solve for k:
k = -F/x.
Plugging in the values we have, we get
k = -(122.63 N)/(0.0830 m) = -1479.28 N/m.
Therefore, the force constant of the spring in the fisherman's scale is approximately 1479.28 N/m.
This means that for every 1 meter the spring is stretched, it will apply a force of 1479.28 N.
It's important to note that fishermen may not always report the mass accurately, but the force applied to the spring will still be proportional to the true mass.
For more such answers on Force Constant
https://brainly.com/question/25313999
#SPJ11
the mars express spacecraft was able to identify the distinctive reflections in the polar cap of an upper layer of
The Mars Express spacecraft was able to identify the distinctive reflections in the polar cap of an upper layer of CO₂ ice and water ice.
The Mars Express spacecraft was equipped with a high-resolution radar instrument called the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS), which was able to penetrate beneath the surface of Mars and identify the distinctive reflections in the polar cap of an upper layer of water ice.
These reflections were caused by variations in the electrical properties of the ice, which allowed the radar waves to bounce back to the spacecraft and create a detailed map of the subsurface structure of the polar cap. This information has been crucial in helping scientists understand the history and evolution of Mars, as well as the potential for water and life on the planet.
The spacecraft's radar instrument, MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding), penetrated the polar cap and detected the unique reflections from different layers. This helped scientists better understand the composition and structure of Mars' polar regions.
For more such questions on Mars Express spacecraft , Visit:
https://brainly.com/question/13443352
#SPJ11
11. the uncertainty in the position of an electron along an x axis is given as 50 pm, which is about equal to the radius of a hydrogen atom. what is the least uncertainty in any simultaneous measurement of the momentum component px of this electron?
According to Heisenberg's uncertainty principle, the product of the uncertainties in position and momentum of a particle along a given axis must be greater than or equal to Planck's constant divided by 4π.
Therefore, the minimum uncertainty in the momentum component px of the electron can be calculated by dividing Planck's constant by twice the uncertainty in position along the x axis. This gives a minimum uncertainty in momentum of approximately 1.05 × 10^-24 kg·m/s. The uncertainty in position of the electron is relatively large, which results in a correspondingly large minimum uncertainty in momentum. This uncertainty in momentum implies that the electron's motion cannot be precisely predicted or determined, which is a fundamental characteristic of quantum mechanics.
To know more about quantum mechanics, here
brainly.com/question/11855107
#SPJ4
Instructions Write a for loop that prints the odd integers 11 through 121 inclusive, each value on a separate line Additional Notes: Regarding your code's standard output, CodeLab will check for case errors and will check whitespace (tabs, spaces,etc)
A for loop that prints the odd integers 11 through 121 inclusive, each value on a separate line is
```python
for i in range(11, 122):
if i % 2 == 1:
print(i)
```
Here's a step-by-step explanation to write a for loop that prints the odd integers 11 through 121 inclusive, each value on a separate line, taking into account the CodeLab requirements:
1. First, we need to write a for loop that starts at 11 and ends at 121, inclusive. We can achieve this by using the range() function and setting the start value to 11 and the stop value to 122 (since the stop value is exclusive):
```python
for i in range(11, 122):
```
2. Now, we need to check if the current integer (i) is odd. We can do this by using the modulo operator (%). If i % 2 equals 1, then the integer is odd:
```python
if i % 2 == 1:
```
3. If the integer is odd, we need to print it on a separate line. We can do this by using the print() function:
```python
print(i)
```
4. Combining all the steps, we have the following code:
```python
for i in range(11, 122):
if i % 2 == 1:
print(i)
```
This code will print the odd integers 11 through 121 inclusive, each value on a separate line, and it meets the CodeLab requirements.
To learn more about odd integers, refer:-
https://brainly.com/question/18365251
#SPJ11
Here's the for loop in Python that prints the odd integers from 11 to 121 (inclusive) on separate lines:
```
for i in range(11, 122, 2):
print(i)
```
In this loop, the `range()` function is used with three arguments: `start`, `stop`, and `step`. The `start` parameter is set to 11, the first odd integer we want to print. The `stop` parameter is set to 122, which is one more than the last odd integer we want to print (121). The `step` parameter is set to 2, so the loop will increment `i` by 2 in each iteration, only considering odd integers. Finally, the `print()` function is called inside the loop to print each odd integer on a separate line.
This code will print the odd integers 11 through 121 inclusive, meeting the requirements of the question.
To know more about for loop in Python:
https://brainly.com/question/30771984
#SPJ11
Most battery-powered devices won?t work if you put the battery in backward. But for a device that you plug in, you can often reverse the orientation of the plug with no problem. Part A Explain the difference. a. You can often reverse the plug in the wall because it is an AC. However, a battery is a DC. b. Battery-powered devices are low-powered. c. Battery-powered devices have many defects in their construction d. You can often reverse the plug in the wall because it is a DC. However, a battery is an AC.
Battery-powered devices require the correct orientation of the battery to function properly.
The difference between being able to reverse the orientation of a plug in a wall outlet versus a battery has to do with the type of electrical current being used.
Wall outlets provide AC (alternating current) power, which means that the direction of the electrical flow switches back and forth rapidly. This means that the orientation of the plug doesn't matter, since the current will flow in either direction.
In contrast, batteries provide DC (direct current) power, which means that the electrical flow only goes in one direction. If a battery is inserted backwards, the current will flow in the wrong direction and the device won't work properly or may even be damaged. Therefore, battery-powered devices require the correct orientation of the battery to function properly.
Learn more about Battery-powered devices
https://brainly.com/question/13530533
#SPJ4
For battery-powered gadgets to operate properly, the battery must be positioned correctly.
The type of electrical current being utilised determines whether a plug in a wall outlet can be turned around vs whether a battery can.
The electricity that comes out of wall plugs is AC (alternating current), which means that the flow of electricity rapidly changes direction. Because the current can flow in either direction, the plug's orientation is irrelevant.
Batteries, on the other hand, deliver DC (direct current) power, which refers to electrical flow that only occurs in one direction. The device won't function properly or might even be harmed if a battery is inserted backwards since the current will flow in the wrong direction. As a result, batteries must be oriented appropriately for battery-powered gadgets to work properly.
Learn more about Battery-powered devices here:
https://brainly.com/question/13530533
#SPJ11
social cognition and third wave cognitive frames
Social cognition refers to how individuals perceive, process, and use information about other people and social situations.
Third wave cognitive frames refer to newer approaches in cognitive psychology that focus on the context in which thoughts and emotions arise, rather than simply examining them in isolation.
Here is a step-by-step explanation of how social cognition and third wave cognitive frames are related:
1) Social cognition is a broad field that encompasses various cognitive processes involved in social interaction, such as perception, attention, memory, and decision-making.
2) One of the key areas of research in social cognition is the study of social schemas, which are mental structures that help individuals organize and interpret information about social situations and people.
3) Third wave cognitive frames build on social cognition research by emphasizing the importance of context in shaping cognitive processes.
This includes considering factors such as cultural norms, personal values, and social relationships.
4) Third wave cognitive frames also highlight the role of emotions and mindfulness in cognitive processing.
For example, mindfulness practices can help individuals become more aware of their thoughts and feelings, which can in turn enhance their social cognition abilities.
6) Another aspect of third wave cognitive frames is the concept of cognitive fusion, which refers to the tendency for individuals to identify with their thoughts and emotions, rather than seeing them as transient experiences.
By practicing cognitive defusion techniques, individuals can learn to distance themselves from their thoughts and emotions, and become more flexible in their social interactions.
7) Overall, the integration of social cognition and third wave cognitive frames highlights the complex interplay between cognitive processes, emotions, and social contexts.
By taking a more holistic approach to studying cognition, researchers and practitioners can develop more effective interventions to enhance social cognition and improve social functioning.
To know more about Social cognition :
https://brainly.com/question/28011228
#SPJ11
a 0.639 h inductor is connected in series with a fluorescent lamp to limit the current drawn by the lamp. if the combination is connected to a 59.9 hz, 169 v line, and if the voltage across the lamp is to be 24.7 v, what is the current in the circuit? (the lamp is a pure resistive load.)
The current in the circuit is 0.698 A.
We can start by finding the reactance of the inductor using the formula:
XL = 2πfL
where XL is the inductive reactance, f is the frequency, and L is the inductance.
XL = 2π(59.9 Hz)(0.639 H) = 240.3 Ω
Since the lamp is a pure resistive load, its resistance is equal to the voltage across it divided by the current flowing through it:
R = V/I
where R is the resistance, V is the voltage, and I is the current.
R = 24.7 V / I
The total impedance of the circuit is given by:
Z = √([tex]R^2[/tex]+ X[tex]L^2)[/tex]
Since the inductor and lamp are connected in series, the current flowing through both is the same, and we can use Ohm's Law to find the current:
I = V/Z
Substituting in the values we have:
Z = √(R^2 + X[tex]L^2[/tex]) = √[(24.7 Ω/I[tex])^2[/tex] + (240.3 Ω[tex])^2[/tex]] = 242.2 Ω
I = V/Z = (169 V)/(242.2 Ω) = 0.698 A
Therefore, the current in the circuit is 0.698 A.
Learn more about Ohm's Law,
https://brainly.com/question/1247379
#SPJ4
according to the equilibrium model of the timing of the tides, what should the time be between successive high tides for a dirunal tide?
It takes approximately 24 hours and 50 minutes for a diurnal tide to complete a full cycle and return to the same phase.
The equilibrium model of the timing of tides predicts that the time between successive high tides for a diurnal tide should be approximately 24 hours and 50 minutes. This is based on the idea that the tides are primarily caused by the gravitational forces of the Moon and Sun on the Earth's oceans.
For a diurnal tide, there is only one high tide and one low tide per day. This is because the Moon and Sun have a combined effect on the tides, and their gravitational forces act in such a way that they cancel out the effects of each other, resulting in a single high tide and a single low tide.
The Moon takes approximately 24 hours and 50 minutes to return to the same position relative to the Earth, and it is this alignment of the gravitational forces of the Moon and Sun that causes the tides. Therefore, it takes approximately 24 hours and 50 minutes for a diurnal tide to complete a full cycle and return to the same phase.
Learn more about diurnal tide
https://brainly.com/question/28098307
#SPJ4
two parallel conducting plates are connected to a constant voltage source. the magnitude of the electric field between the plates is 2,000 n/c. if the voltage is doubled and the distance between the plates is reduced to 1/5 the original distance, the magnitude of the new electric field is:
The magnitude of the new electric field is 40,000 N/C.
The electric field between two parallel plates is given by E = V/d, where E is the electric field, V is the potential difference between the plates, and d is the distance between the plates.
If the voltage is doubled, the new potential difference becomes 2V. If the distance between the plates is reduced to 1/5 the original distance, the new distance becomes d/5. Therefore, the new electric field is given by E' = (2V) / (d/5) = 10V/d = 10(2000 N/C) = 20,000 N/C.
However, the question asks for the magnitude of the new electric field, so the answer is the absolute value of 20,000 N/C, which is 40,000 N/C.
To learn more about electric field, here
https://brainly.com/question/15800304
#SPJ4
a 100-kg astronaut throws a 1-kg wrench with a force of 1 n. what is the acceleration of the wrench after the wrench leaves the astronaut’s hand?
To find the acceleration of the 1-kg wrench after it leaves the 100-kg astronaut's hand when thrown with a force of 1 N, you can use Newton's second law of motion:
Newton's second law of motion, also known as the law of acceleration, states that the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass. Mathematically, the second law can be expressed as:
Force = mass x acceleration.
Step 1: Identify the known values.
Force (F) = 1 N
Mass (m) = 1 kg
Step 2: Use Newton's second law of motion to calculate acceleration (a).
F = m * a
1 N = 1 kg * a
Step 3: Solve for acceleration (a).
a = F / m
a = 1 N / 1 kg
a = 1 m/s²
The acceleration of the wrench after it leaves the astronaut's hand is 1 m/s².
To learn more about Newton's second law of motion. Please Visit:
https://brainly.com/question/13447525
#SPJ11
Newton's second law of motion can be used to determine the acceleration of the 1-kg wrench after it leaves the 100-kg astronaut's hand when thrown with a force of 1 N:
The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass, according to Newton's second rule of motion, commonly referred to as the law of acceleration. The second law can be defined mathematically as:
Mass times acceleration equals force.
Determine the values that are already known.
Mass (m) = 1 kg and Force (F) = 1 N
Step 2: Determine the acceleration (a) using Newton's second rule of motion.
F = m * a
1 N = 1 kg * a
Calculate acceleration (a) in step three.
a = F/m, a = 1 N/kg, a = 1 m/s2, etc.
After leaving the astronaut's hand, the wrench accelerates at a rate of 1 m/s2.
learn more about Newton's second law of motion here:
https://brainly.com/question/13447525
#SPJ11
what is the magnitude of the net change of the magnetic field measured at 7 m on the lefthand side of the current sheet compared to 7 m on the right-hand side? the permeability of free space is
The magnitude of the net change of the magnetic field measured at 7 meters on the left-hand side of the current sheet compared to 7 meters on the right-hand side is 0.
To calculate the magnitude of the net change in the magnetic field, we will use the formula for the magnetic field due to an infinite current sheet, which is:
B = (μ₀ * I) / (2 * π * d)
Where B is the magnetic field, μ₀ is the permeability of free space, I is the current, and d is the distance from the current sheet. We will calculate the magnetic field at 7 meters on both sides of the current sheet and find the difference.
Calculate the magnetic field on the left-hand side at 7 meters (B[tex]^{1}[/tex]).
B[tex]^{1}[/tex] = (μ₀ * I) / (2 * π * 7)
Calculate the magnetic field on the right-hand side at 7 meters (B[tex]^{2}[/tex]).
B[tex]^{2}[/tex] = (μ₀ * I) / (2 * π * 7)
Since both distances are the same, the magnetic fields on both sides will be the same, which means B[tex]^{1}[/tex] = B[tex]^{2}[/tex].
Calculate the net change in the magnetic field (ΔB).
ΔB = |B[tex]^{1}[/tex] - B[tex]^{2}[/tex]|
Since B[tex]^{1}[/tex] = B[tex]^{2}[/tex], the net change in the magnetic field will be 0.
So, at 7 meters on the left-hand side of the current sheet compared to 7 meters on the right-hand side, 0 is the magnitude of the net change of the magnetic field measured.
More on magnetic field: https://brainly.com/question/20351032
#SPJ11
a board that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density 300 kg/m3. the board is floating partially submerged in water. what fraction of the volume of the board is above the surface of the water?
The buoyant force on the board is equal to the weight of the water displaced by the submerged portion of the board. The weight of the board itself can be found from its volume and density:
Volume of board = length x width x thickness = 3.00 m x 0.200 m x 0.0500 m = 0.03 [tex]m^3[/tex]
Weight of board = volume x density x gravity = 0.03 m^3 x 300 kg/[tex]m^3[/tex] x 9.81 [tex]m/s^2[/tex] = 88.29 N
The buoyant force is equal to the weight of the water displaced:
Buoyant force = weight of water displaced = density of water x volume of water displaced x gravity
The density of water is 1000 kg/[tex]m^3,[/tex] and the volume of water displaced is equal to the volume of the submerged portion of the board, which can be found from the height of the board above the water level:
Height above water level = 3.00 m - submerged height
Submerged height = density of board x volume of submerged portion / (density of water x width x thickness)
Submerged height = 300 kg/[tex]m^3[/tex] x V / (1000 kg/[tex]m^3[/tex] x 0.200 m x 0.0500 m) = 0.09 V
The buoyant force is then:
Buoyant force = 1000 kg/[tex]m^3[/tex]x 0.09 V x 9.81 [tex]m/s^2[/tex]= 88.29 N
Since the board is floating partially submerged, the buoyant force is equal to the weight of the submerged portion of the board. The fraction of the board that is above the surface of the water is equal to the ratio of the weight of the submerged portion to the weight of the entire board:
Fraction above water = (weight of board - weight of submerged portion) / weight of board
Fraction above water = (88.29 N - buoyant force) / 88.29 N
Fraction above water = (88.29 N - 88.29 N) / 88.29 N = 0
Therefore, none of the board is above the surface of the water.
Learn more about buoyant force,
https://brainly.com/question/21990136
#SPJ4
A cylindrical beaker of mass 50kg, cross sectional area 25cm3 and height 10cm is filled with oil of density 0.8g/cm3.(i):what is the total mass. (ii) A piece of aluminum of mass 66g and density 2.2g/cm3, is lowered carefully into the beaker. What volume of oil overflows?. (iii) What is the final mass of the beaker and its contents after the outside has been wipe to remove overflow liquid?
Answer:
(i) The volume of the cylindrical beaker is given by:
V = A x h = (25 cm^2) x (10 cm) = 250 cm^3
The mass of the oil in the beaker is given by:
m_oil = density x volume = (0.8 g/cm^3) x (250 cm^3) = 200 g
The total mass of the beaker and oil is therefore:
m_total = m_beaker + m_oil = 50 kg + 0.2 kg = 50.2 kg
(ii) The volume of the aluminum is given by:
V_aluminum = m_aluminum / density = 66 g / (2.2 g/cm^3) = 30 cm^3
When the aluminum is lowered into the beaker, it displaces an equal volume of oil. Therefore, the volume of oil that overflows is 30 cm^3.
(iii) The final mass of the beaker and its contents is the sum of the mass of the beaker, the mass of the oil remaining in the beaker, and the mass of the aluminum:
m_final = m_beaker + m_oil + m_aluminum = 50 kg + 0.17 kg + 0.066 kg = 50.24 kg
To calculate the mass of the remaining oil, we need to subtract the volume of aluminum from the volume of the beaker and multiply by the density of the oil:
V_remaining_oil = (A x h) - V_aluminum = (25 cm^2 x 10 cm) - 30 cm^3 = 220 cm^3
m_remaining_oil = density x V_remaining_oil = 0.8 g/cm^3 x 220 cm^3 = 176 g
Therefore, the final mass of the beaker and its contents after the overflow liquid has been wiped off is 50.24 kg, and there is 176 g of oil remaining in the beaker
an airliner passes over an airport at noon traveling 530 mi/hr due east, at 1:00 pm, another airliner passes over the same airport at the same elevation traveling due south at 580 mi/hr. assuming both airliners maintain their (equal) elevation, how fast is the distance between them changing at 3:00 pm.
The rate of change of the distance between the two airliners at 3:00 pm is 720 mph.
How to find the rate of change of the distance between two airliners?We can use the Pythagorean theorem to determine the distance between the two airliners at any time t, and then differentiate the equation with respect to time to find how fast the distance is changing.
Let d be the distance between the two airliners, and let x and y be the distances traveled by the first and second airliners respectively, from their respective starting points. Then, we have:
d² = x² + y²
Differentiating both sides with respect to time, we get:
2d(dd/dt) = 2x(dx/dt) + 2y(dy/dt)
At 3:00 pm, the first airliner has traveled for 3 hours, covering a distance of 1590 miles (530 miles/hr * 3 hours) due east from the airport. Similarly, the second airliner has traveled for 2 hours, covering a distance of 1160 miles (580 miles/hr * 2 hours) due south from the airport.
Substituting these values, we get:
d² = (1590)² + (1160)²
d = √[(1590)² + (1160)²] = 1934 miles (approx.)
Differentiating with respect to time, we have:
2d(dd/dt) = 2(1590)(530) + 2(1160)(-580)
Simplifying, we get:
dd/dt = [-1590(530) + 1160(580)] / 1934
dd/dt = -48.5 mph (approx.)
Therefore, the distance between the two airliners is decreasing at a rate of approximately 48.5 mph at 3:00 pm.
Learn more about Pythagorean theorem
brainly.com/question/14930619
#SPJ11
a circular wire loop of radius 0.360 cm lies in the xz-plane. there is a uniform magnetic field in the y-direction that decreases at 0.0150 t/s . find the magnitude of the induced electric field in the wire.
The magnitude of the induced electric field in the wire is zero.
To find the magnitude of the induced electric field in the wire, we need to use Faraday's Law of electromagnetic induction, which states that the magnitude of the induced electromotive force (emf) in a closed loop is equal to the rate of change of magnetic flux through the loop.
The magnetic flux through the loop is given by:
Φ = B × A × cosθ
where B is the magnitude of the magnetic field, A is the area of the loop, and θ is the angle between the magnetic field and the normal to the loop.
Since the loop lies in the xz-plane, the angle between the magnetic field and the normal to the loop is 90 degrees, so cosθ = 0.
Therefore, the magnetic flux through the loop is:
Φ = 0
The rate of change of magnetic flux through the loop is then:
dΦ/dt = 0 - 0 = 0
So the induced emf in the loop is:
emf = -dΦ/dt = 0
However, the induced emf is related to the induced electric field by:
emf = ∮E•dl
where ∮E•dl is the line integral of the electric field around the loop.
Since the loop is a circle, we can simplify the line integral to:
∮E•dl = E × 2πr
where r is the radius of the loop.
Therefore, the induced electric field in the wire is:
E = emf / (2πr) = 0 / (2π × 0.00360) = 0
You can learn more about magnitude at: brainly.com/question/30881682
#SPJ11
a car accelerates from rest to a certain velocity in a certain time. assume that there is no friction, and that the engine power is constant. consider the following scenarios independently.how long would it take to reach the same velocity if the engine had half the power?
The time taken for the car to reach the same final velocity with half the engine power will be twice as long as the time taken with the original engine power.
If a car accelerates from rest to a certain velocity in a certain time, and there is no friction and the engine power is constant, then we can use the following equation to relate the velocity of the car to its acceleration and the time taken:
v = at
where v is the final velocity of the car, a is the acceleration of the car, and t is the time taken for the car to reach the final velocity.If the engine power is halved, then the acceleration of the car will also be halved, assuming that the mass of the car remains constant. Therefore, we can use the same equation to calculate the time taken for the car to reach the same final velocity:
v = (1/2)a(2t)
where a is the halved acceleration, and 2t is the time taken for the car to reach the same final velocity with half the engine power.
Simplifying the equation, we get:
t = (1/2)(2t)
Therefore, the time taken for the car to reach the same final velocity with half the engine power will be twice as long as the time taken with the original engine power.
Learn more about engine power.
https://brainly.com/question/4047180
#SPJ4
13. what type of lens is used to make a magnifying glass? a) converging b) diverging c) either type would work equally well.
Option (a).
A converging lens is used to make a magnifying glass, which works by bending light to create a magnified image.
The curved surface of the lens helps to focus and magnify the object being viewed.
Learn more about lens https://brainly.com/question/15123066
#SPJ11
Fill in the diagram to show how two objects with different speeds move in the same
amount of time.
More speed _________________________ in the same amount of time.
Less speed _________________________ in the same amount of time.
In the same amount of time, an object with more speed will travel a greater distance than an object with less speed.
What is the relationship between speed and time for moving objects?The relationship between speed and time for moving objects can be described using the equation:
Speed = Distance / Time
This equation shows that the speed of a moving object is directly proportional to the distance it covers and inversely proportional to the time it takes to cover that distance.
In other words, if the distance remains constant, the faster an object moves, the less time it takes to cover that distance. Conversely, if an object moves at a slower speed, it takes more time to cover the same distance.
Learn more about speed:https://brainly.com/question/28224010
#SPJ1
what range of accelerating voltages would be required to scan the mass range between 16 and 300, for singly charged ions, if the field strength is held constant?
Accelerating voltage range depends on the spectrometer and field strength, and for time-of-flight, it's V = sqrt((mz²L)/(2q)), with a range of about √(8L) to √(150*L) where L is flight path.
How to find the range of accelerating voltages?The range of accelerating voltages required to scan the mass range between 16 and 300 for singly charged ions depends on the type of mass spectrometer being used and the specific field strength being held constant.
Assuming a constant field strength and a time-of-flight mass spectrometer, the required range of accelerating voltages can be calculated using the equation:
m = (2q[tex]V^2[/tex])/[tex]z^2*L[/tex]
where m is the mass of the ion, q is the charge on the ion, V is the accelerating voltage, z is the charge on the ion (in this case, z=1 for singly charged ions), and L is the length of the flight path.
Solving for V, we get:
V = √((mz²L)/(2*q))
For the mass range between 16 and 300, the largest value of V will correspond to the ion with m=300, and the smallest value of V will correspond to the ion with m=16.
Using the above equation, we can calculate the range of accelerating voltages as:
[tex]V_m_a_x[/tex] = √((3001²L)/(21)) = √(150L)
[tex]V_m_i_n[/tex] = √((161²L)/(21)) = √(8L)
Therefore, the range of accelerating voltages required to scan the mass range between 16 and 300 for singly charged ions is approximately between √(8L) and √(150L), where L is the length of the flight path in the mass spectrometer.
Learn more about Accelerating voltage
brainly.com/question/17127402
#SPJ11
a woodchuck runs 19 m to the right in 4.8 s, then turns and runs 12 m to the left in 5 s. Part (a) What is the magnitude of the average velocity of the woodchuck in m/s?
v=____. PART B What is its average speed in m/s?
The magnitude of the average velocity of the woodchuck is 0.71 m/s. The average speed of the woodchuck is 3.2 m/s.
Right distance = 19m
Time is taken to cover distance = 4.8s
Left distance = 12m
Time is taken to cover distance = 5s
total displacement = 19 m to the right - 12 m to the left = 7 m to the right
A. To calculate the magnitude of the average velocity, we need to find the total displacement and divide it by the total time.
The total time it took for the woodchuck to run both distances is:
The total time = 4.8 s + 5 s
The total time = 9.8 s
The magnitude of the average velocity is:
v = displacement/time
v = 7 m / 9.8 s
v = 0.71 m/s
B. To find the average speed, we need to calculate the total distance traveled and divide it by the total time.
The total distance traveled is = 19 m + 12 m = 31 m
The total time it took for the woodchuck to run both distances is:
The average speed = total distance / total time
The average speed = 31 m / 9.8 s = 3.2 m/s
Therefore we can conclude that the magnitude of the average velocity is 0.71 m/s and the average speed is 3.2 m/s.
To learn more about average speed
https://brainly.com/question/14618248
#SPJ4
A train car with a mass of 2000 kg is traveling east at 10 m/s. It is approaching another train car with a mass of 1000 kg also traveling east at 3 m/s. After the trains collide, the more massive train car continues east at 6 m/s. What is the new velocity of the less massive train car?
The new velocity of the less massive train car has a velocity of 10 m/s after the collision.
What is velocity?Velocity is a measure of the rate and direction of an object's motion. It is a vector quantity, meaning it has both magnitude and direction. Velocity is typically represented by the equation v = s/t, where v is the velocity, s is the displacement (or distance travelled), and t is the time taken. Velocity is often confused with speed, which is the measure of the magnitude of an object's motion. Speed is a scalar quantity and is represented by the equation s = t/v.
The total momentum of the two train cars before the collision is calculated by multiplying the mass of each car by its velocity.
The total momentum of the system before the collision is 2000 kg x 10 m/s + 1000 kg x 3 m/s = 23000 kg m/s.
The total momentum of the system after the collision is 2000 kg x 6 m/s + 1000 kg x v, where v is the velocity of the less massive train car after the collision.
Therefore, we can set up the equation 23000 = 12000 + 1000v and solve for v.
v = 10 m/s.
To learn more about velocity
https://brainly.com/question/24445340
#SPJ1