Question
Physics Question on work, energy and power
The door of a running refrigerator inside a closed room was left open. Which of the following observations will be seen?
A
(A) The room will be warmed up gradually.
B
(B) The temperature of the room will remain unaffected.
C
(C) The room will become as cold as the refrigerator.
D
(D) The room will be cooled slightly.
Answer
(A) The room will be warmed up gradually.
Explanation
Solution
Explanation:
Refrigerator is a device that transfers heat from inside a box to its surroundings. If you leave the door open, heat is merely recycled from the room into the refrigerator, then back into the room. A net room temperature increase would result from the heat of the motor that would be constantly running to move energy around in a circle.