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physics 04 flotation
Pg.No.
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Page 1
Q.1. Which force acts on the body by the liquid in the upward direction, when it is immersed partly or wholly in a liquid?
Q.2. Who gave the buoyancy principle?
Q.3. Name the principle which states that "When a body is immersed partly or wholly in a liquid, there is an apparent loss in the weight of the body which is equal to the weight of liquid displaced by the body"?
Q.4. Why an iron ball sinks in water?
Q.5. Why a large ship floats in seas?
Q.6. Why a fat person will quickly learn swimming as compared to a slim person?
Q.7. Why a hydrogen filled balloon float in air ?
Q.8. Where a person can lift more weight, in water or on land?
Q.9. In which alignment should the centre of gravity of the body and the centre of gravity of the displaced liquid be alinged to float a body in a liquid?
Q.10. The mass per unit volume is known as?
Q.11. What is relative density?
Q.12. Write the S.I. unit of density?
Q.13. Which instrument is used to measure relative density?
Q.14. Where it is easy to swim in normal water or more dense sea water?
Q.15. Why a ship raises a bit when it enters in a saline sea from a river?
Q.16. Why a solid chunk of iron sink in water but floats in mercury?
Q.17. What happens to the water level in the vessel, if the ice floating in water in a vessel melts?
Q.18. Which instrument is used to measure the purity of milk?
Q.19. How much part of ice floating in water remains under water?
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