A process generates 250 watts of useful energy and 600 watts of waste energy. What is the efficiency of the process?

A) 29%
B) 71%
C) 2.4%
D) 42%

The correct answer is: A) 29%

250/(250+600) = ____

Thank you!

To find the efficiency of the process, we need to divide the useful energy output by the total energy input and then multiply by 100 to express it as a percentage.

Efficiency = (Useful energy output / Total energy input) x 100

In this case, the useful energy output is given as 250 watts and the waste energy is given as 600 watts. We need to find the total energy input.

Total energy input = Useful energy output + Waste energy
Total energy input = 250 watts + 600 watts
Total energy input = 850 watts

Now we can plug these values into the efficiency formula:

Efficiency = (250 watts / 850 watts) x 100

Simplifying the equation, we get:

Efficiency = 0.29411764706 x 100

Rounding to the nearest whole number, we find that the efficiency of the process is approximately 29%. Therefore, the correct answer is A) 29%.