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What is the contribution of physics to o...

What is the contribution of physics to our society ?

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PRADEEP-PHYSICAL WORLD AND MEASUREMENT-Short answer Questions 3 marks
  1. What efforts have been made towards unification of forces ?

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  2. Given three examples where Physics has been used in technology.

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  3. What is the contribution of physics to our society ?

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  4. What is a physical unit? Write the essential requirments that a physic...

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  5. Why mks system had to be rationalised to obtain SI ? Define the unit o...

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  6. Name and define all the basic and supplementary units of SI.

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  7. State advantages of SI over other systems of units.

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  8. Define Astronomical unit, light year and parscond. Establish relation ...

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  9. What is meant by giga, micro and femto ? Establish the relation betwee...

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  10. What is meant by order of magnitude ? Illustrate with atleast three ex...

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  11. What are the instruments used for the measurement of length from 10^(-...

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  12. Name the quantites represented by the dimensional formula [M^1 L^2 T^(...

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  13. Choose the pairs of quantities which have same dimensions : Impulse, f...

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  14. Energy and yougn's modulus have the same dimensions, comment.

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  15. The dimensions of quantites in one or more of the following pairs are ...

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  16. Show that is e is electronic charge, h is Planck's constant, c is velo...

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  17. Find the dimensions of Planck's constant. If its value in cgs system i...

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  18. Calculate the dimensions of universal gravitational constant. If its v...

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  19. The rate flow (V) of a liquid through a pipe of radius (r ) under a pr...

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  20. If the speed of light c ( = 3xx10^8m//s), Planck's constant h(=6.6xx10...

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