Advertisements
Advertisements
प्रश्न
The relative density of alcohol is 0.8. Its density is
विकल्प
0.8
800 kg nr3
800 g cm-3
0.8 kg m-3
Advertisements
उत्तर
800 kg nr3
APPEARS IN
संबंधित प्रश्न
What is meant by the term ‘buoyancy’ ?
The density of aluminium is 2.7 g cm-3 and that of brass 8.4 g cm’3. The correct statement is
Explain the meaning of the statement
‘Relative density of aluminium is 2.7’.
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?
You are provided with a hollow iron ball A of volume 15 cm3 and mass 12 g and a solid iron ball B of mass 12 g. Both are placed on the surface of water contained in a large tub.
- Find upthrust on each ball.
- Which ball will sink? Give a reason for your answer (Density of iron = 8.0 g cm-3)
What is meant by up thrust?
Is thrust a scalar or vector quantity?
In a fluid, buoyant force exists because the pressure at the ______ of an object is greater than the pressure at the top.
