Which best describes the heat that you can feel on the engine of a running car? The heat is unusable and absorbed by the engine.
The heat is usable and absorbed by the engine.
The heat is unusable and lost to the surroundings.
The heat is usable and lost to the surroundings.

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?