Advertisements
Advertisements
प्रश्न
It is much easier to burst an inflated balloon with a needle than by a finger. Explain.
Advertisements
उत्तर
Because needle tip has very less area of cross-section in comparison to that of our finger and we know that pressure exerted by a force is inversely proportional to the area where it has been applied, so pressure exerted will be more by the needle tip than the finger.
APPEARS IN
संबंधित प्रश्न
Explain the following :
Two holes are made in a completely filled sealed tin can to take out oil from it .
A partially inflated balloon is placed inside a bell jar connected to a vacuum pump. On creating vacuum inside the bell jar, balloon gets more inflated. How does the pressure change: increase, decrease or remains same, inside the (a) bell jar, (b) balloon?
How is the barometric height of a simple barometer affected if A drop of liquid is inserted inside the tube?
Give reasons for the following:
As we go higher, the atmospheric pressure decreases.
Select the correct option.
The atmospheric pressure on the earth’s surface is approximately
State briefly, how and why the atmospheric pressure of a place varies with the altitude. Draw an approximate graph to illustrate this variation.
What is meant by atmospheric pressure?
Name the instrument used to measure atmospheric pressure.
Why do not we feel uneasy even under enormous pressure of the atmosphere above as?
What effect does temperature have on air pressure?
