$40 QUESTION -- Category: BT & You

What is one (1) Btu?

  1. The time it takes to melt a two-inch ice cube, measured at an elevation of 10,000 feet.

  2. The amount of light generated by a three-inch candle in a sealed room with no wind.

  3. The heat energy needed to raise the temperature of a pound of water one degree Fahrenheit at sea level.


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