Question

Answer the following.....

Define standard 1kg,1m and 1s

Answer 1

1. It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures. It was originally defined as the mass of one liter (10-3 cubic meter) of pure water. At the Earth's surface, a mass of 1 kg weighs approximately 2.20 pounds (lb
2. The meter was originally defined as one ten-millionth (0.0000001 or 10-7) of the distance, as measured over the earth's surface in a great circle passing through Paris, France, from the geographic north pole to the equator. One meter is a little more than three English feet, or about 39.37 inches.
3. The second (abbreviation, s or sec) is the Standard International ( SI ) unit of time. One second is the time that elapses during 9,192,631,770 (9.192631770 x 10 9 ) cycles of the radiation produced by the transition between two levels of the cesium 133 atom. ... One second is equal to 1/86,400 of a mean solar day.

Answer 2

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• 1 kg: It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures. It was originally defined as the mass of one liter $({10}^{-3}$cubic meter) of pure water. At the Earth's surface, a mass of 1 kg weighs approximately 2.20 pounds(lb).

• 1m: The meter (abbreviation, m; the British spelling is metre) is the International System of Units (SI) unit of displacement or length. One meter is the distance traveled by a ray of electromagnetic (EM) energy through a vacuum in 1/299,792,458$(3.33564095 x {10}^{-9})$ of a second.

• 1 SECOND: The second (abbreviation, s or sec) is the Standard International ( SI ) unit of time.One second is the time that elapses during $9,192,631,770 (9.192631770 × {10}^{9} )$ cycles of the radiation produced by the transition between two levels of the cesium 133 atom.