Advertisements
Advertisements
Question
Describe a simple experiment to illustrate that air exerts pressure.
Solution
EXPERIMENT : Take a tin-can having air tight cap (screw cap). Remove cap and boil some water in it, so that steam comes out and in this way air from inside goes out. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating vacuum above them. We see the can crumbles due to air pressure from outside. This proves that air exerts pressure.
APPEARS IN
RELATED QUESTIONS
What do you mean by atmospheric pressure?
Explain the following :
A balloon collapses when air is removed from it.
What is meant by the statement 'the atmospheric pressure at a place is 76 cm of Hg'? State its value in Pa.
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
What is an altimeter? State its principle. How is its scale calibrated?
At sea level, the atmospheric pressure is 1.04 x 105 Pa. Assuming g = 10 m s-2 and density of air to be uniform and equal to 1.3 kg m-3, find the height of the atmosphere.
Convert 1 mm of Hg into pascal. Take density of Hg = 13.6 x 103 kg m-3 and g = 9.8 m s-2 .
A solid weighs 2.10 N in air. It has a relative density of 8.4. How much will the body weigh if placed: In a liquid of relative density 1.2
The atmosphere is a layer of gases surrounding the planet.
The highest air pressure at sea level was recorded at ______ Russia.
