Why does a helium balloon burst when it rises too high up?
The pressure inside the balloon is more than outside pressure
None of these
The pressure inside the balloon is less than outside pressure
The pressure inside the balloon is equal to the outside pressure
The pressure applied by the air which is present above us is called as
Identify the high pressure and the low pressure region.
A column of air extending up to the height of atmosphere and base of area 10 cm × 10 cm was kept above a boy's head. Why didn't he get crushed?
The pressure inside our body is also equal to the atmospheric pressure and they cancel each other out.
The pressure inside our body is unequal to the atmospheric pressure.
The above statement is incorrect.
Can't be said.
Which of the following options is correct?
Atmospheric pressure increases with increase in altitude
Atmospheric pressure remains constant with increase or decrease in altitude
Atmospheric pressure does not depend on altitude
Atmospheric pressure decreases with increase in altitude
- lesser than
- higher than
- equal to
Pick out the options which work on the same working principle as that of the given device.
An ink dropper
The burning of fossil fuels creates a low pressure region. Pick out the correct options regarding this.
As temperature increases, pressure decreases
As temperature increases, pressure increases
As temperature increases, molecules start moving and air expands
As temperature increases, molecules comes closer to each other
A rubber sucker as shown above, when pressed on a surface sticks to it, because:
The suckers have a very strong adhesive force.
Atmospheric pressure is less than the internal pressure.
A partial vacuum is created on pressing the rubber sucker.
Atmospheric pressure acts on it externally.
- absolute pressure
- atmospheric pressure
- gauge pressure
- fluid pressure
When we press the bulb of a dropper with its nozzle kept in water, the air in the dropper escapes 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 driven by:
Pressure of water
Shape of rubber bulb
Gravity of the earth