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A family uses 8 kW of power. Compare t...

A family uses 8 kW of power.
Compare this area to that of the roof of a typical house.

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comparable to the roof of a large house jjof dimension `14m xx 14m`.
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NCERT GUJARATI-WORK, ENERGY AND POWER-EXERCISES
  1. Answer carefully, with reasons : What are the answers to (a) and (b)...

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  2. Answer carefully, with reasons : If the potential energy of two bill...

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  3. A body is initially at rest. It undergoes one-dimensional motion with ...

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  4. A body is moving unidirectionally under the influence of a source of c...

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  5. A body constrained to move along the z-axis of a coordinate system is ...

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  6. An electron and a proton are detected in a cosmic ray experiment, the ...

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  7. A rain drop of radius 2mm falls from a height of 500 m above the groun...

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  8. A molecule in a gas container hits a horizontal wall with speed 200 ms...

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  9. A pump on the ground floor of a building can pump up water to fill a t...

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  10. The bob A of a pendulum released from 30^(@) to the vertical hits anot...

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  11. The bob of a pendulum is released from a horizontal position. If the l...

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  12. A trolley of mass 300 kg carrying sandbag of 25 kg is moving uniformly...

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  13. A body of mass 0.5 kg travels in a straight line with velocity v= ax^(...

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  14. The blades of a windmill sweep out a circle of area A. If the wind f...

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  15. The blades of a windmill sweep out a circle of area A. What is the k...

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  16. The blades of a windmill sweep out a circle of area A. Assume that t...

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  17. A person trying to lose weight (dieter ) lifts a 10 kg mass , one thou...

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  18. A person trying to lose weight (dieter ) lifts a 10 kg mass , one thou...

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  19. A family uses 8 kW of power. Direct solar energy is incident on the ...

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  20. A family uses 8 kW of power. Compare this area to that of the roof o...

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