A barometer made of very narrow tuve (see fig) is placed at normal temperature and pressure. The coefficient of volume expansion of mercury is `0.00018per C^@` and that of the tube is negligible. The temperature of mercury in the barometer is now raised by `1^@C`, but the temperature of the atmosphere does not raised by `1^@C`, but the temperature of the atmosphere does not change. Then the mercury height in the tube remains unchanged.

State true/false: S_1 : Hydrostatic pressure is a scalar quantity even though pressure is force divided by area and force is a vector quantity? S_2 : A barometer made of a very narrow tube (see figure) is placed at normal temperature and pressure. The coefficient of volume expansion of mercury is 0.00018//.^@C and that of the tube is negligible. The temperature of mercury in the barometer is now raised by 1^@C but the temperature of the atmosphere does not change. Then, the mercury height in the tube remains unchanged. S_3 A block of ice with a lead shot embedded in it is floating on water contained in a vessel. The temperature of the system is maintained at 0^@C as the ice melts. When the ice melts completely the level of water in the vessel rises.

Explain the statement- "The coefficient of real expansion of mercury is 0.00018l^@C . "

At normal atmospheric pressure the height of the mercury column in barometer is

Temperature and Pressure || Barometer Atmospheric Pressure

Explain how is the height of mercury column in the tube of a simple barometer, a measure of the atmospheric pressure.

A piece of metal floats on mercury. The coefficients of volume expansion of the metal and mercury are gamma_1 and gamma_2 respectively. If the temperatures of both mercury and the metal are increased by an amount DeltaT , the fraction of the volume of the metal submerged in mercury changes by the factor............

Measuring Pressure By Mercury Barometer

Calculate the atmospheric pressure , if the height of mercury column in a barometer is 760 mm