How can you...?

Question

take the energy from a camp fire and use it to cool an ice box?

how does a jet engine move an airplane?

Answer 1

You are cheating Yahoo out of 5 points. ...;-)...that's 2 questions!
1) Haven't seen such set-up in existence. But in principle, you could use the heat from the camp fire to evaporate a liquid, or liquid gas, which causes its container to cool down, which then can cool your ice box. Quite a complicated contraption, because you also need to -re-condensate the vapour back to a liquid.

2) Same way as you blow up a balloon, and then let it go. A jet engine sucks air into a large inlet, and "shoots" it out through a smaller hole, at very high speed.

Answer 2

1) You could:

Use it to heat the boiler of a basic steam engine and connect the drive shaft to the compressor of an A/C unit. Basically, you don't want the heat, but you want to use the heat to generate kinetic energy which drives a separate cooler.

Or you could generate electricity via your preferred method and run a piezoelectric cooler.

2) It sucks and compresses air in the front with a rotary compressor, and then injects fuel into the compressed gases, which combust. The hot gases exit the back at high speed, propelling the plane forward. On their way, they turn a turbine which drives the compressor (via a drive shaft). Modern turbofan jet engines also use a big many-bladed internal fan to blow extra air through a bypass path around the combustion chamber. This harnesses more of the energy and yields greater fuel efficiency.