Advertisements
Advertisements
Question
What effect does temperature have on air pressure?
Solution
- Temperature and air pressure are closely related.
- Whenever the temperature is high, the air pressure is low.
- As the temperature rises, the air gets heated, expands, and becomes lighter.
- This lighter air in the vicinity of the earth's surface starts moving upwards in the sky. As a result, the air pressure in such areas decreases.
RELATED QUESTIONS
Give reason for the following:
A balloon collapses when air is removed from it.
Describe an experiment to demonstrate that air exerts pressure.
What is a barometer? How is a simple barometer constructed?
How is the barometric height of a simple barometer affected if Its tube is pushed down into the trough of mercury?
How does the atmospheric pressure change with altitude? Draw an approximate graph to show this variation.
State two factors which affect the atmospheric pressure as we go up.
At a given place, a mercury barometer records a pressure of 0.70 m of Hg. What would be the height of water column if mercury in barometer is replaced by water? Take density of mercury to be = 13.6 × 103 kg m-3.
State two advantages of an aneroid barometer.
State two factors which affect the atmospheric pressure as we go up.
What will be the effect on air pressure if the temperature drops? Why?
