The moisture present in mercury increases the barometric height of simple barometer.

Briefly describe construction of a simple barometer.

Auxins increase the height of the plant by

The space above the mercury in a simple barometer is called :

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

Why is mercury used as a barometric liquid? Give three reasons.

State two advantages of an aneroid barometer over a simple barometer.

The region above mercury in a barometer consists of .........

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.

The temperature of earth's atmosphere increases with height in