Your roommate leaves a 120w fan running in your apartment. over the course of an hour, how much thermal energy does the fan add to the air ?

Explanation:

Power is related to energy by the following relationship:

where

P is the power used

E is the energy used

t is the time elapsed

In this problem, we know that

- the power of the fan is P = 120 W

- the fan has been running for one hour, which corresponds to a time of

So we can re-arrange the previous equation to find E, the energy (in the form of thermal energy) released by the fan:

its c its is a mixture of gases

see earlier