Question

4. The output energy of a good machine is
always greater than input energy.
5. The ratio between the input energy to the
output energy of a machine is called its
efficiency .True or False​

Answer 1

The ratio between the input energy to the

output energy of a machine is called its

efficiency . True

Answer 2

Answer:

True

Explanation:

Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat.