Kelvin's statement of second law of thermodynamics: It is impossible that, at the end of a cycle of changes, heat has been extracted from a reservoir and an equal amount of work has been produced without producing some other effect.
Kinetic energy: The energy possessed by a body due to its motion, it is equal to ½ mv2, where m is the mass and v is the speed of the body
Kepler's first law of planetary motion: Each planet moves in an elliptical orbit, with the sun located at one of the foci.
Kepler's second law of planetary motion: The radius vector joining the planet to the sun covers equal areas in equal intervals of time.
Kepler's third law of planetary motion: The square of the period of a planet is directly proportional to the cube of the radius of the semi major axis of the orbit.
Kilocalorie: The amount of energy required to raise the temperature of one kilogram of water by 1 , 1 Kcal = 1000 calories.
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