Question

In any energy transformation, there is always some energy that gets wasted as non-useful heat.
True
False

In any energy transformation, there is always some energy that gets wasted as non-useful heat.
True
False

@Physics

Answer 1

False. For example, dropping a stone in a vacuum, such as the moon. There potential energy is converted to kinetic energy without energy loss.

Another example, when an electron drops one energy level in an atom and a photon is emitted. There is no 'heat loss'

Answer 2

At the small scale of the electron what is heat anyway?

Answer 3

At the microscopic level, in a strictly physics sense, the term "heat" isn't used. It's more appropriately called thermal energy which describes the random, thermal motion of the particles.

Answer 4

In any macroscopic system energy transformation will generate heat