Q. 9

Expert-verified
Found in: Page 594

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# Do the energy-transfer diagrams in represent possible refrigerators? If not, what is wrong?

a. The figure is not refrigerator ,because this engine dumps heat in the cold reservoir which is not a refrigerator does.

b. In figure ,so it is refrigerator engine.

c. In figure ,so it is not refrigerator engine.

See the step by step solution

## Step 1: Possible of refrigerators for part a

a.

Work is used to compress a coolant and raise its temperature over that of the surrounding environment.

Consider the figure of part a,

## Step 2: Possible of refrigerators for part b

b.

Consider the part b of figure,

The efficiency of normal refrigerator engine is,

The efficiency of carnot refrigerator engine is,

So it's a possibility.

## Step 3:  Possible of refrigerators for part c

c.

Consider the figure,

The efficiency of normal refrigerator engine is,

The efficiency of carnot refrigerator engine is,

So it's a possibility.