a process generates 250 watts of useful energy and 600 watts of waste energy. what is the efficiency of the process?
A 29%
B 42%
C 2.4%
D 71%
To find the efficiency of the process, we need to find the ratio of useful energy output to the total input energy.
Efficiency = (Useful energy output / Total input energy) * 100
Total input energy = Useful energy output + Waste energy
Total input energy = 250 watts + 600 watts = 850 watts
Efficiency = (250 / 850) * 100 ≈ 29.41%
Therefore, the efficiency of the process is approximately 29%. The correct answer is A.