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प्रश्न
The density of aluminium is 2.7 g cm-3 and that of brass 8.4 g cm’3. The correct statement is
विकल्प
Equal masses of aluminium and brass have equal volumes
The mass of a certain volume of brass is more than the mass of equal volume of aluminium.
The volume of a certain mass of brass is more than the volume of equal mass of aluminium.
Equal volumes of aluminium and brass have equal masses.
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उत्तर
The mass of a certain volume of brass is more than the mass of equal volume of aluminium.
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संबंधित प्रश्न
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Distinguish between density and relative density.
A cork piece floats on water surface while an iron nail sinks in it. Explain the reason.
For a floating body, how is its weight related to the buoyant force?
Explain why an iron needle sinks in water, but a ship made of iron floats on water.
How is the unit bar related to the S.I. unit pascal?
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.
The area of base of a cylindrical vessel is 300 cm2. Water (density= 1000 kg m-3) is poured into it up to a depth of 6 cm. Calculate : (a) the pressure and (b) the thrust of water on the base. (g = 10m s-2.
In what direction and at what point does the buoyant force on a body due to a liquid act?
Select the correct option.
Thrust acting perpendicularly on the unit surface area is called
