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A new unit of length is chosen such that...

A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance ?

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NCERT BANGLISH-UNITS AND MEASUREMENT-EXERCISE
  1. A new unit of length is chosen such that the speed of light in vacuum ...

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  2. Which of the following is the most precise device for measuring length...

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  3. A student measures the thickness of a human hair by looking at it thro...

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  4. The mean diameter of a thin brass rod is to be measured by vernier cal...

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  5. The photograph of a house occupies an area of 1.75 cm^(2) on a 35 mm s...

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  6. State the number of significant 0.007 m^(2)

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  7. State the number of significant 2.64xx10^(24) kg

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  8. State the number of significant 0.2370 g cm^(-3)

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  9. State the number of significant 6.320 J

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  10. State the number of significant 6.032 N m^(-2)

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  11. State the number of significant 0.0006032 m^(2)

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  12. The length , breadth and thickness of a rectangular sheet of metal are...

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  13. The mass of a box measured by a grocer's balance is 2.30 kg. Two gold ...

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  14. A physical quantity P is related to four observables a,b,c and d as fo...

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  15. A book with many printing errors contains four different formulas for ...

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  16. A famous relation in physics relates 'moving mass' m to the 'rest mass...

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  17. The unit of length convenient on the atomic scale is known as an angs...

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  18. One mole of an ideal gas at standard temperature and pressure occupies...

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  19. Explain this common observation clearly: If you look out of the window...

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  20. The principle of 'parallax' in section 2.3.1 is used in the determinat...

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