You need to buy a new refrigerator. When you go shopping you narrow your choice down to two options. 

Option A is 85% efficient and costs $1500. 

Option B costs $1200 but is only 75% efficient. 

2. a. The fridge needs to make 5.4x10⁹ J of useful energy over the course of a year. How much total energy electrical does each option use?
4. b. The fridge is going to be on 24/7 for the entire year. What is the power of each option?
6. b. Which one would you buy? Why?

Answer rating: 100% (QA)

a To find out how much total energy each option uses we need to calculate the total input energy req... View the full answer