Physics
Describe a simple experiment to demonstrate that a liquid enclosed in a vessel exerts pressure in all directions.
Answer
Take a vessel filled with a liquid (say, water). Place it on a horizontal surface. Make several small holes in the wall of the vessel anywhere below the free surface of liquid. It is observed that liquid spurts out through each hole. This shows that the liquid exerts pressure at each point on the wall of the vessel.
Related Questions
Explain the principle of a hydraulic machine. Name two devices which work on this principle.
The diagram in figure shows a device which makes use of the principle of transmission of pressure.
(i) Name the parts labelled by the letters X and Y.
(ii) Describe what happens to the valves A and B and to the quantity of water in the two cylinders when the lever arm is moved down.
(iii) Give reasons for what happens to the valves A and B in part (ii).
(iv) What happens when the release valve is opened ?
(v) What happens to the valve B in cylinder P when the lever arm is moved up ?
(vi) Give a reason for your answer in part (v)
(vii) State one use of the above device.
Draw a simple diagram of a hydraulic jack and explain it's working.
Deduce an expression for the pressure at a depth inside a liquid.