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

Respond to this Question

First Name
School Subject
Your Answer

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