Home Electricity: Estimating Efficiency Home lab 1 Purpose The purpose of this activity is for the student to practice estimating the efficiency of an electrical device by comparing the output energy obtained with the input energy required to run the device. This will be done by using different kitchen appliances to boil water and comparing how much energy was needed to boil the water. 2 Introduction Because cooking food is an essential task of everyday life, it is desirable to choose appliances and methods of cooking that will result in the lowest use of energy (in view of maintaining an affordable energy bill). This is where physics considerations can help. Boiling water is typically an essential task for cooking a meal. This investigation will have you determine how much energy is needed to boil the same volume of water with different kitchen appliances. It is at this point that you should consider that some appliances may prove to be more efficient than others