Question

A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?

A. 92 percent
B. 94 percent
C. 97 percent
D. 96 percent

Answer 1

see below I got 94 %

Answer 2

thanks

Answer 3

You are welcome :)

Answer 4

[AI-generated answer — Explain Bot]

To find the efficiency of a machine, you need to divide the useful work done by the machine by the total energy supplied to the machine, and then multiply by 100 to express the result as a percentage.

In this case, the energy supplied to the machine is given as 4,000 W, and the useful work done by the machine is given as 3,760 W.

To calculate the efficiency, use the formula:

Efficiency = (Useful work / Total energy supplied) * 100

Plugging in the given values:

Efficiency = (3,760 W / 4,000 W) * 100

Simplifying:

Efficiency = (0.94) * 100 = 94 percent

Therefore, the efficiency of the machine is 94 percent. The correct option is B.