# Physics

posted by .

A refrigerator does 18kJ of work while moving 115 kJ of thermal enegy from inside the refrigerator. What is its coefficient of performance?

• Physics -

Refrigerators do not do work. Work has to be done UPON them to transfer heat out. I will assume that they meant to say 18 kJ of work IS CONSUMED by the refrigerator.

Refrigerator C.O.P. = Qout/Win
= 115/18 = 6.38

## Similar Questions

1. ### physics

A refrigerator has a coefficient of performance of 2.25, runs on an input of 95 W of electrical power, and keeps its inside compartment at 5 degrees celsius. IF you put a dozen 1.0 L plastic bottles of water at 31 degrees celsius in …
2. ### physics

A refrigerator has a coefficient of performance of 2.25, runs on an input of 95 W of electrical power, and keeps its inside compartment at 5 degrees celsius. IF you put a dozen 1.0 L plastic bottles of water at 31 degrees celsius in …
3. ### physics

You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 199 kg, and you need to exert a force of 343 N to make it just begin to move. (a) What is the coefficient of static friction between …
4. ### Physics

A refrigerator has a coefficient of performance of 4.0. When removing 2.4x10^4 J from inside the refrigerator, how much energy is sent into the environment?
5. ### Physics

A Carnot refrigerator is used in a kitchen in which the temperature is kept at 301 K. This refrigerator uses 216 J of work to remove 2360 J of heat from the food inside. What is the temperature inside the refrigerator?
6. ### Physics

Help!!!! Please!!! The coefficient of performance of a refrigerator is defined as the ratio of heat extracted from the refrigeration compartment to the work required to operate the refrigerator. A certain refrigerator has a coefficient …
7. ### Physics

Can someone, please help me out with this question. A uniform rectangular 91.21 kg refrigerator with height h = 2.069 m and width w = 1.153 m is pushed at a constant velocity across a level floor. The refrigerator is pushed in the …
8. ### Physics

A carnot refrigerator uses an ideal carnot cycle to cool its interior. The outside air has a temp of 304K and the refrigerator is kept at a temp of 279K. 1) what is the coefficient of performance of this refrigerator?
9. ### Physics

A carnot refrigerator uses an ideal carnot cycle to cool its interior. The outside air has a temp of 304K and the refrigerator is kept at a temp of 279K. 1) what is the coefficient of performance of this refrigerator?
10. ### physics

Just like the efficiency can be used to tell how 'good' an engine is, the Coefficient of Performance can be used to compare refrigerators. If a refrigerator requires 1.21×104 J of work to remove 3.23×104 J of energy from the inside …

More Similar Questions