Question

a prototype of one standard kg and one standard meter is kept under the one atmospheric pressure and zero degree celsius temperature in the international bureau of weights and measurement . Why?

Answer 1

Dear Student,

Kilogram and meter are the respective SI units for weight and length measurement.
1 atm Pressure and 0-degree Celsius means STP - standard temperature and pressure.
Atmosphere (atm) is a unit of measuring the pressure exerted by a gas. The atmospheric pressure at sea level is 1 atmosphere and is taken as the normal atmospheric pressure.

Hence, a prototype of one standard kg (SI unit of weight) and one standard meter (SI unit of length) is kept under the one atmospheric pressure and zero degree Celsius temperature in the international bureau of weights and measurement.

Regards