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The mass of a box measured by a grocer's...

The mass of a box measured by a grocer's balance is 2.30 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is (a) the total mass of the box, (b) the difference in the masses of the pieces to correct significant figures ?

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(a) 2.3 kg (b) 0.02 g
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NCERT GUJARATI-UNITS AND MEASUREMENT-EXERCISE
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  4. State the number of significant 0.007 m^(2)

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

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

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

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

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

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

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

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

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

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

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  16. The nearest star to our solar system is 4.29 light years away. How muc...

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  17. Precise measurements of physical quantities are a need of science. For...

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  18. Just as precise measurements are necessary in science, it is equally i...

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  19. The Sun is a hot plasma (ionized matter) with its inner core at a temp...

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  20. When the planet Jupiter is at a distance of 824.7 million kilometers f...

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