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Give reasons for the following :A cork p...

Give reasons for the following :A cork piece floats but an iron piece sinks in water.

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MBD-GRAVITATION-Example
  1. A steel needle sinks in water but a steel ship floats. Explain how ?

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  2. Give reasons for the following :A sharp blade is more effective in cut...

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  3. Give reasons for the following :A cork piece floats but an iron piece ...

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  4. Explain the following : Swimmers are provided with an inflated rubber ...

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  5. Explain the following : It is easier of swim in sea water than in rive...

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  6. Why is the pressure on ground more when a man is walking than when he ...

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  7. Why a bucket of water is lighter when in water than when it is taken o...

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  8. If a fresh egg is put into a beaker filled with water, it sinks. On di...

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  9. Two spheres of 1kg mass each are separated by 3 m. Calculate the gravi...

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  10. The radius of moon is 1.7 xx10^6m and its mass is 7.35xx 10^22 kg. Wha...

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  11. Find the change in weight percentage of a body when it is taken from e...

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  12. At what height above the earth surface, the acceleration due to gravit...

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  13. A ball is dropped from top of 40m high tower. What will be its velocit...

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  14. If weight of an object is 49 N then what will be its mass ?

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  15. A block of wood is kept on the table top. The mass of wooden block is ...

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  16. A block of wood is kept on the table top. The mass of wooden block is ...

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  17. What is g on the moon as compared to that on earth?

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  18. What is unit of G?

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  19. What is the mass of the earth?

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  20. What is essential property of matter- mass or weight ?

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