A 1500-W heater is connected to a 120-V line.How much heat energy does it produce in 2.0 hours?
A) 1.5 kJ
B) 3.0 kJ
C) 0.18 MJ
D) 11 MJ
E) 18 MJ

Question

Quizplus · Accepted Answer

The heat energy produced by the heater can be calculated using the formula: energy = power x time. Here, power = 1500 W (or 1500 J/s) and time = 2.0 hours = 7200 seconds. So, energy = 1500 J/s x 7200 s = 10,800,000 J or 10.8 MJ, which is closest to option D, 11 MJ.

A 1500-W Heater Is Connected to a 120-V Line