Advertisements
Advertisements
प्रश्न
The pressure P1 at the top of a dam and P2 at a depth h form the top inside water (density p) are related as :
विकल्प
P1 > P2
P1 = P2
P1 - P2 = h ρ g
P2 - P1 = h ρ g
Advertisements
उत्तर
The pressure P1 at the top of a dam and P2 at a depth h form the inside water (density p) are related as : P2 - P1 = h ρ g
संबंधित प्रश्न
Name the force which makes heavy objects appear light when immersed in a liquid.
What happens to the buoyant force as more and more volume of a solid object is immersed in a liquid ? When does the buoyant force become maximum ?
A body sinks in a liquid A but floats in a liquid B. The density of liquid A is ....... than the density of liquid B.
Why do sea divers need special protective suit?
The diagram below in Fig. 4.12 shows a device which makes the use of the principle of transmission of pressure.

- Name the parts labelled by the letters X and Y.
- Describe what happens to valves A and B and to the quantity of water in the two cylinders when the lever arm is moved down.
- Give reasons for what happens to valves A and B in part (ii).
- What happens when the release valve is opened?
- What happens to valve B in cylinder P when the lever arm is moved up?
- Give a reason for your answer in part (v).
- State one use of the above device.
Why is a force needed to keep a block of wood inside water?
It is easier to lift a heavy stone under water than in air. Explain.
A metal solid cylinder tied to a thread is hanging from the hook of a spring balance. The cylinder is gradually immersed into the water contained in a jar. What changes do you expect in the readings of the spring balance? Explain your answer.
Complete the following sentence.
Mass = .................... × density
Select the correct option.
Unit of thrust in the SI system is
