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- What is meant by density and relative density ?
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- What do you mean by buoyancy? In which direction does the buoyant forc...
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- State Archimedes' principle.
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- Name two forces which act on a body immersed in a liquid. Give the dir...
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- How is submarine able to move on water surface as well as go under wat...
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- Give reason when Big buildings and dams have wide foundations for safe...
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- A steel needle sinks in water but a steel ship floats. Explain how ?
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- Give reasons for the following :A sharp blade is more effective in cut...
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- Give reasons for the following :A cork piece floats but an iron piece ...
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- Explain the following : Swimmers are provided with an inflated rubber ...
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- Explain the following : It is easier of swim in sea water than in rive...
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- Why is the pressure on ground more when a man is walking than when he ...
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- Why a bucket of water is lighter when in water than when it is taken o...
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- If a fresh egg is put into a beaker filled with water, it sinks. On di...
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- Two spheres of 1kg mass each are separated by 3 m. Calculate the gravi...
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- The radius of moon is 1.7 xx10^6m and its mass is 7.35xx 10^22 kg. Wha...
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- Find the change in weight percentage of a body when it is taken from e...
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- At what height above the earth surface, the acceleration due to gravit...
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- A ball is dropped from top of 40m high tower. What will be its velocit...
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- If weight of an object is 49 N then what will be its mass ?
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