Pressure and volume are inversely related. When the pressure on a gas is doubled, what happens to the volume?
It is halved.
It is a constant.
It doesn't change.
It is doubled.

first one is the correct answer

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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