Energy - Unit

High up in the , lived the Kilowatt-hour (kWh) . This giant was responsible for the entire city's electricity. He was a bit of a businessman, always showing up on monthly bills to tell families how much energy their lightbulbs and air conditioners had used.

stepped forward, but he realized he was quite small—it took 3.6 million of him just to match one Kilowatt-hour ! energy unit

But Joule wasn’t the only one in town. Across the river in the , there was Calorie , a warm and friendly unit who spent her days heating up water. She was quite popular with the local chefs and athletes, always measuring the fuel in their food. High up in the , lived the Kilowatt-hour (kWh)

In the , the British Thermal Unit (BTU) was the king of the furnaces. He was a bit old-fashioned, still measuring heat by how much it could warm up a pound of water, but he was essential for anyone buying natural gas or heating oil. stepped forward, but he realized he was quite

giggled, knowing she was about 4.18 times as big as a single Joule.