Energy and Use of Energy

The ability of human beings to use various forms of energy is one of the greatest developments in human history. Electrical energy brings cities to life. Modern transportation powered by energy links peoples together. Modern society is geared to using electricity as a main energy source.

There are many reasons why electricity is the most common energy source used at home and in the office. This elective topic begins by reviewing domestic appliances for lighting, cooking and air-conditioning. These appliances show how physics principles are used to make our homes better and more comfortable places to live in.

Students investigate the total amount of energy transferred when these appliances are in operation. They also learn how to calculate the cost from power rating of the appliances.