Question

Energy efficiency = useful energy output/total energy input x 100(%)

If a power plant uses 100 units of energy to create electricity and the output is 5 units, where does the 95% of the energy input go?

A: Lost as heat
B: Lost as gas
C: Escapes the system as potential energy

Answer 1

Answer:

no

Explanation:

No, a real machine can't have an efficiency of 100%. An efficiency of 100% means that there is no loss and the output energy (or work) of the machine is equal to input energy (or work). In real machines, there is always some loss of energy to overcome friction and air resistance