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2 years ago

Sort the phrases based on whether they represent kinetic energy or potential energy.

2 answers:

alexandr1967 [171]2 years ago

8 0

Kinetic energy:
*the energy of a moving body*
rising water vapor.
the wings of flying hummingbird.
rolling marble.

Potential energy:
*the energy that is stored in a body so that any small change in position or state of the body, will result in this body movement by transforming all this potential energy into kinetic energy*
stone resting.
disconnected battery (the potential energy is what called voltage here)
stretched rubber band.

Hope this helps.

dangina [55]2 years ago

6 0

Answer:

Kinetic energy:

*the energy of a moving body*

rising water vapor.

the wings of flying hummingbird.

rolling marble.

Potential energy:

*the energy that is stored in a body so that any small change in position or state of the body, will result in this body movement by transforming all this potential energy into kinetic energy*

stone resting.

disconnected battery (the potential energy is what called voltage here)

stretched rubber band.

Explanation:

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The table shows information about four students who are running around a track. Which statement is supported by the information

Vikentia [17]

Answer:

Correct option: Mohammed has less kinetic energy than Autumn.

Explanation:

Kinetic Energy

Is the energy an object has due to its motion. If the object has a mass m and travels at a speed v, then the kinetic energy K is:

$\displaystyle K=\frac{1}{2}mv^2$

The information about four students includes their mass and velocity as follows:

Autumn has a mass of m1=50 kg and a velocity (magnitude) of v1=4 m/s, thus their kinetic energy is:

$\displaystyle K_1=\frac{1}{2}50\cdot 4^2$

$K_1=400\ J$

Mohammed has a mass of m2=57 kg and a velocity (magnitude) of v2=3 m/s, thus their kinetic energy is:

$\displaystyle K_2=\frac{1}{2}57\cdot 3^2$

$K_2=256.5\ J$

Lexy has a mass of m3=53 kg and a velocity (magnitude) of v3=2 m/s, thus their kinetic energy is:

$\displaystyle K_3=\frac{1}{2}53\cdot 2^2$

$K_3=106\ J$

Chiang has a mass of m4=64 kg and a velocity (magnitude) of v4=5 m/s, thus their kinetic energy is:

$\displaystyle K_4=\frac{1}{2}64\cdot 5^2$

$K_4=800\ J$

Sorted from lower kinetic energy to higher:

Lexy, Mohammed, Autumn, Chiang. Thus:

Autumn has more kinetic energy than Chiang. False

Mohammed has less kinetic energy than Autumn. True

Lexy has more kinetic energy than Mohammed. False

Chiang has less kinetic energy than Lexy. False

Correct option: Mohammed has less kinetic energy than Autumn.

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2 years ago

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alexgriva [62]

As per the question the distance travelled by a car is 28.4 inch.

we are asked to determine the conversion factor in centimeter which when multiplied with 28.4 inch will give a unit.

we know that one inch =2.54 centimeter.

Hence 28.4 inch = 2.54 ×28.4 cm

=72.136 cm.

Now we have to determine the conversion factor .The multiplication factor is calculated as $P =\frac{28.4 inch*2.54cm}{1 inch}$

$p= 72.136 cm$ [p is the multiplication factor.]

Hence the multiplication factor is 72.137 cm which will give unit conversion when multiplied with 28.4 inch.

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Answer: Weight only.

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If a rock is transported from the moon to the earth, the mass is constant for the object but the weight will depends on the locations of the object. The gravitational acceleration would change because the radius and mass of the Moon is different from the Earth.

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Answer:

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Poverty is one of the biggest cause of childhood maltreatment that impact once psychological health.
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