An electrical power plant manages to send 88% of the heat produced in the burning of fossil fuel into the water-to-steam conversion. Of the heat carried by the steam, 40% is converted to the mechanical energy of the spinning turbine. Which of the following choices best describes thvall efficiency of the heat-to-work conversion in the plant (as a percentage) ?

A. less than 40%

B. exactly 147%

C. 64%

D. greater than 88%

E. 40%

Question

Physics

Wyatt Jennings

27 September, 18:22

An electrical power plant manages to send 88% of the heat produced in the burning of fossil fuel into the water-to-steam conversion. Of the heat carried by the steam, 40% is converted to the mechanical energy of the spinning turbine. Which of the following choices best describes thvall efficiency of the heat-to-work conversion in the plant (as a percentage) ?

A. less than 40%

B. exactly 147%

C. 64%

D. greater than 88%

E. 40%

+1

Answers (1)

Know the Answer?

Selina Finley · Answer 1

A

Explanation:

Let the x represent the amount of heat generated from the fossil fuel.

88% of x = 0.88 x

0.88 x was used to convert water to steam.

heat carried by steam = 40% * 0.88 x = 0.352 x

efficiency of the heat - to - work conversion = work output / work input = 0.352 x / x = 0.352 * 100 = 35.2 % which is less than 40 %