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Define length. Name the device used for ...

Define length. Name the device used for measuring directly the lengths from `10^-3 m` to `10^2 m`.

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SL ARORA-Units and Measurements-Exercise
  1. Define length. Name the device used for measuring directly the lengths...

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  2. Calculate the number of astronomical units in one metre.

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  3. How many parsec are ther in one metre?

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  4. How many metre are there in a light year?

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  5. The density of air is 1.293 kg /m^3. Express it in cgs units.

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  6. Express an acceleration of 10ms^(-2) in km h^(-2)

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  7. If a mass of a proton is 1.67xx10^(-27)kg, how many protons will be pr...

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  8. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  9. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  10. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  11. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  12. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  13. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  14. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  15. Write the order of magnitude of the following : (i) 8 (ii) 49 (...

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  16. What is one astronomical unit ? Express it in metres . Write its or...

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  17. What is the order of magnitude of second in a day ?

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  18. In a submarine fitted with a SONAR, the time between the genretaion of...

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  19. A radar signal is beamed towards a planet and its echo is recived 7 mi...

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  20. A rock under water is 1595 m deep. Find the time in which an ultrasoni...

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  21. The angle of elevation of the top of a hill is 30^(@) from a point on ...

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