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A calorie is a unit of heat (energy in t...

A calorie is a unit of heat (energy in transit) and it equals about 4.2 J where 1J= `1 kg m^(2) s^(-2)`. Suppose we employ a system of units in which the unit of mass equals `alpha` kg, the unit of length equals `beta`m, the unit of time is `gamma`s. Show that a calorie has a magnitude 4.2`alpha^(-1)beta^(-2)gamma^(2)` in terms of the new units.

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A calorie is a unit of heat or energy and it equals about 4.2 J, where 1 J = 1 kg m^(2) s^(-2) . Suppose we employ a system of units in which the unit of mass equals alpha kg , the unit of length equals is beta m , the unit of time is gamma s . Show tthat a calorie has a magnitude 4.2 alpha^(-1) beta^(-1) gamma^(2) in terms of the new units.

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NCERT GUJARATI-UNITS AND MEASUREMENT-EXERCISE
  1. A calorie is a unit of heat (energy in transit) and it equals about 4....

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  2. Explain this statement clearly : "To call a dimensional quantity 'la...

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  3. A new unit of length is chosen such that the speed of light in vacuum ...

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

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

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  6. You are given a thread and a metre scale. How will you estimate the di...

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  7. A screw gauge has a pitch of 1.0mm and 200 divisions on the circular s...

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

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

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

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

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

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

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

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

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

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

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  18. The unit of length conventent on the atomic scale is known as an angs...

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

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

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