A SIMPLE BAROMETER
Take a tub and with help of modelling clay fix a ruler vertically in it. Fill half of the tub with water. Take a plastic bottle, paste a length of surgical plaster along the entire length of it and make marks at gap of 5 mm on the plaster. Fill three fourth of the bottle with water, cover its mouth with your thumb and invert the bottle inside the the tub.
Depending on changes in air pressure the water level in bottle will increase and decrease.
Credits: Dhingra Publishing House
Take a tub and with help of modelling clay fix a ruler vertically in it. Fill half of the tub with water. Take a plastic bottle, paste a length of surgical plaster along the entire length of it and make marks at gap of 5 mm on the plaster. Fill three fourth of the bottle with water, cover its mouth with your thumb and invert the bottle inside the the tub.
Depending on changes in air pressure the water level in bottle will increase and decrease.
Credits: Dhingra Publishing House
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