Question: how much energy (in joules) does it take to toast a slice of bread?
Answer: The power of our toaster is 1200 watts and the times it takes to toast a piece of bread is one minute which we will convert into seconds by multiplying by 60 seconds per minute. The energy consumed will be the power multiplied by time. So that's 1,200 watts times 60 seconds, which is 72,000 joules.