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(a ) what is the difference between the...

(a ) what is the difference between the density and relative density of a substance ?
(b) If the relative density of a substance is 7.1 what will be its density in SI units ?

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The correct Answer is:
(b) `7.1 xx 10^(3) kg//m^(3)`
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LAKHMIR SINGH & MANJIT KAUR-GRAVITATION-Exercise
  1. Wjhat is the density of a substance of mass 100 g and volume 10 cm^(3)

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  2. The density of a body is 800 kg // m^(3).Will it sink of float when di...

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  3. (a ) what is the difference between the density and relative density ...

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  4. Define thrust .What is its units ?

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  5. Why do we feel light on our feet when standing in a swimming pool with...

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  6. Explain why,big boulders can be moved easily by flood ?

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  7. An iron nail sinks in water but it floats in mercury. Why ?

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  8. Expain why, a piece of glass sinks in water but it floats in mercury.

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  9. Steel sinks in water but a steel boat floats .why ?

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  10. Explain why, school bags are provided with wide straps to carry them.

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  11. Why does a sharp knife cut object more effectively than a blunt knife ...

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  12. Explain why a wide steel belt is provided over the wheels of an army ...

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  13. Explain why ,the tip of a sewing neddis is sharp.

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

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  15. Explain why when a person stands on a cushion , the depression is much...

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  16. Use your ideas about pressure to explain why it is easier to walk on s...

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  17. Explain why,a nail has a pointed tip .

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  18. Explain why, building and dams have wide foundations.

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  19. Why do camels have large flat feet ?

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  20. A pressure of 10 Pa acts on an area of 3.0 m^(2) .What is the force ac...

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