ECON 132 Lecture Notes - Lecture 8: Horsepower, Watt, Kilogram
Document Summary
Pound-force (lbf) the force required to give a mass of 1 pound an acceleration of gravity at the surface of the earth. Newton (n) the force required to give a mass of 1 kilogram an acceleration of 1 meter per second per second. Foot-pound (ft-lb) mechanical energy required to lift a weight of 1 pound through a height of 1 foot. Joule (j) the amount of work done when an applied force of 1 newton moves through a distance of 1 meter in the direction of the force. British thermal unit (btu) the quantity of heat energy needed to raise the temperature of 1 pound of water by 1 f. Kilocalorie (kcal) the quantity of heat energy needed to raise the temperature of 1 kilogram of water by 1 c. 1 f = (1 c x 1. 8) + 32. Kilowatt-hour (kwh) the amount of electric energy consumed when an electrical power of 1 kilowatt is maintained for.
