By opening the door of a refrigerator kept in a room -
- AYou can cool the room by a few degrees
- BYou can cool it to the temperature of a refrigerator
- CYou can eventually heat the room up a bit
- DYou can neither heat nor cool the room
Show answer and explanation
Correct answer: (c) You can eventually heat the room up a bit
Explanation
A refrigerator does not destroy heat; it moves heat from inside to the coils at its back. With the door open, it takes heat from the room and puts it straight back into the room.
Its motor also turns electrical energy into heat, so in the end the room becomes slightly warmer.