Other Units
- 1 board-foot = 1 ft × 1 ft × 1 in = 2.360 dm3
- 1 British thermal unit (Btu) ≈ 1055 J
- 1 calorie (cal) = 4.184 J
- 1 large calorie (kilocalorie, food calorie) (Cal, kcal) = 4.184 kJ
- 1 hand = 10.16 cm
- 1 horsepower ≈ 745.7 W
- 1 R-value (ft2·°F·h/Btu) ≈ 0.1761 RSI (K·m2/W)
- 1 slug (mass) = 1 lbf·s2/ft
- Various combination units are in common use, including the foot-pound and the pound per square inch; these are straightforwardly defined based on the above basic units.
Read more about this topic: Customary Units In The United States
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“Even in harmonious families there is this double life: the group life, which is the one we can observe in our neighbour’s household, and, underneath, another—secret and passionate and intense—which is the real life that stamps the faces and gives character to the voices of our friends. Always in his mind each member of these social units is escaping, running away, trying to break the net which circumstances and his own affections have woven about him.”
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