Question

Which of the following is true about high-energy mechanical devices?

They usually need to be kept warm in order to preserve mechanical energy
They usually need to be cooled to dissipate thermal energy build-up and prevent damage.
They usually convert radiant energy into electrical energy
During an energy conversion, none of the energy is transferred as thermal energy because the devices are free of friction.

Answer 1

They usually need to be cooled to dissipate thermal energy build-up and prevent damage

Step-by-step explanation:

Answer 2

They usually need to be cooled to dissipate thermal energy build-up and prevent damage :}

Step-by-step explanation: