14)
it takes 3 minutes to make toast in a 1500 watt toaster. calculate how much work is done by the toaster.
a) 8.3 j
b) 60 j
c) 90,000 j
d) 270,000 j

Watt is a unit for power that is also equal to J/s. We therefore need to convert the minutes to seconds first before answering. Every minute is comprised of 60 seconds. Therefore, 3 minutes are composed of 180 seconds. Multiplying the number of seconds to the given power will give us,
                                    Work = Power x time
                                              = (1500 J/s) x (180 s) 
                                              = 270,000 J
Therefore, the answer is letter D.