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.

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.

anonymous · Answer

HALP