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HOT WATER |
| Making water hot takes energy . . . lots of it. A typical family uses 15-20 million BTU’s of energy each year to heat water for washing everything from hands to dishes. It takes about 168 gallons of fuel oil, or 19,900 cubic feet of natural gas, or 4,500 kilowatt-hours of electricity to do the job. |
| The two experiments in this chapter have an important fact in common: they both show us how we may have been wasting energy unexpectedly. |