Atmospheric Pressure

Q.

One atmospheric pressure is equal to

Q.

What are the applications of atmospheric pressure?

Q.

Give any three applications of pressure.

Q.

How does a drinking straw works on atmospheric pressure?

Q.

Why is water not used as a barometric liquid?

1. The density of water is greater than all other liquids.

2. The density of water is low.

3. The vapor pressure of water is negligible.

4. Water gives a correct reading.

Q.

Why do mountaineers usually suffer from nose-bleeding at high altitudes?

Q. When we press the bulb of a dropper with its nozzle kept in water, the air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to______.​

1. atmospheric pressure
2. gravity of the earth​
3. shape of rubber bulb​
4. pressure of water​

Q.

What are the different types of pressure?

Q.

Can a rubber sucker be stuck on a rough surface?

Q.

What is the value of atmospheric pressure at sea level?

Q.

What is the function of the white bead present in WBC Pipette?

Q.

Give two examples from everyday life which show that air exerts pressure.

Q.

why is it not advisable to carry a fountain pen while travelling in an aeroplane ?

Q.

(a) What is meant by atmospheric pressure? What is the cause of atmospheric pressure?

(b) Why are our bodies not crushed by the large pressure exerted by the atmosphere?

(c) Explain why, atmospheric pressure decreases as we go higher up above the earth's surface.

Q.

What is atmospheric pressure due to?

Q.

Why does the nose bleed at high altitude places?

Q.

Describe one activity to show the existence of atmospheric pressure.

Q.

Pressure increases with height as we go up in atmosphere. True or False?

1. True

2. False

Q. Why does a rubber sucker get stick to a surface ????

Q.

How is Liquid Pressure Measured?

Q.

At what depth below the surface of water will pressure be equal to twice the atmospheric pressure? (Atmospheric pressure = 10 $N/c{m}^2$, Density of water = ${10}^{3}kg/m^3$, g $=9.8m/s^2$)

1. None of these.

2. Of acceleration due to gravity.

3. The air inside it was hot.

4. The air inside the balloon was exerting pressure in all directions.

Q. A water tank has three holes A, B and C. The water coming out of the three holes is falling at different distances. Explain.

Q.

Why do aeroplanes have pressurised cabins for the passengers?

Q.

Why is it difficult to pull out a rubber sucker stuck to surface like glass? [5 MARKS]

Q.

Why does surface tension act tangentially?

Q. Name some of the devices which use liquid pressure and the principle behind them.Also why liquid pressure is preferred over other ways of exerting force.

Q. We use a straw to drink juice from a glass. What makes this possible?

1. Mass of the liquid
2. Volume of the liquid
3. Atmospheric pressure
4. Gravitational pull

Q.

The airplane have air pressure nearly about the pressure that we are taking on the earth when we are standing on the ground but the pressure outside the airplane is very or lesser then why we don't get crushed inside the airplane?

Q.

The reason we are not crushed under the weight of air is, that the pressure inside our body is equal to the atmospheric pressure outside.

1. True

2. False

Q.

What is meant by atmospheric pressure?