Awatyaelidn
Answered

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Multiple Choice: Choose The Letter

1. Which of the following is a conversion from chemical energy to thermal energy?
a. Coal is burned to boil water.
b. Food is digested and used to regulate body temperature.
c. Charcoal is burned in barbeque pit.
d. All of the above.

2. Wich of the following is the best example of increasing an objects potential energy.
a. Rolling a bowling ball
b. Turning on a light bulb
c. Stretching a rubber band
d. Dropping a pen

3. An object that has kinetic energy must be...

a. Lifted above earth's surface.
b. In motion
c. At rest
d. None of the above

plsssssss
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Sagot :

Arlhynjhoygerarcasidn

Answer:

1d

2c

3a

sana makatulong

Lianaleedelfinidn

Answer:

1. A

//During conversions from chemical energy to thermal energy, the energy stored in the chemical bonds are released and this energy causes surrounding molecules to move faster thus increasing the thermal energy of a substance. Examples of Chemical Energy to Thermal Energy: 1. Coal is burned at a power plant.

2. C

//Because when released, the rubber band will spring back toward its resting state, transferring the potential energy to kinetic energy in the process. So that's one example of increasing an object's potential energy.

3. D

//Kinetic energy must always be either zero or a positive value. While velocity can have a positive or negative value, velocity squared is always positive.

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