(British Thermal Unit) The heat required to raise the temperature of one pound of water 1°, or 1/180 the heat required to raise one pound of water from 32 to 212°F at one atmosphere pressure.
(British Thermal Unit) The heat required to raise the temperature of one pound of water 1°, or 1/180 the heat required to raise one pound of water from 32 to 212°F at one atmosphere pressure.