Advertisements
Advertisements
Question
Explain the following :
Two holes are made in a completely filled sealed tin can to take out oil from it .
Advertisements
Solution
There is no air inside a completely filled and sealed can. When a single hole is made to drain out the oil from the can, some of the oil will come out and due to that the volume of air above the oil will increase and hence the pressure of air will decrease. But if two holes are made on the top cover of the can, air outside the can will enter it through one hole and exert atmospheric pressure on the oil from inside along with the pressure due to oil column, and it will come out of the can from the other hole.
APPEARS IN
RELATED QUESTIONS
The atmospheric pressure is nearly 105 Pa.
Give reason for the following:
A balloon collapses when air is removed from it.
What is a barometer?
The radius of the press plunger and pump plunger are in ratio of 50 : 4. If an effort of 20 kgf acts on the pump plunger, calculate the maximum effort which the press plunger can over come.
State briefly, how and why the atmospheric pressure of a place varies with the altitude. Draw an approximate graph to illustrate this variation.
What does a falling barometer indicate?
Draw a simple diagram of a Fortin's barometer and state how it is used to measure the atmospheric pressure.
What is an aneroid barometer?
Draw a neat and labeled diagram to explain its construction and working.
Humans are sensitive even to a small variations in pressure.
