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How much the work is done, when earth mo...

How much the work is done, when earth moves around the sun in its orbit.

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The motion of earth around the sun is-

Work is done only when:

Fill in the blanks: Earth revolves around the sun in ________ orbit.

What remains constant when the earth revolves around the sun?

Which of the diagrams show in figure most closely shows the variation is kinetic energy of the earth as it moves once around the sun in its elliptical orbit?

Find the component Statements of the following and check whether they are true or not : The earth revolves around the sun or the moon.

In accordance with the Bohr's model, find the quantum number that characterises the earth's revolution around the sun in an orbit of radius 1.5 xx 10^11 m with orbital speed 3 xx 10^4 m/s . (Mass of earth = 6.0 xx 10^24 kg .)

MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
  1. Which would have greater effect on the kinetic energy of an object-dou...

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  2. Name the energy transformation taking place in the following devices: ...

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  3. How much the work is done, when earth moves around the sun in its orbi...

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  4. A 5 kg ball is thrown upwards with a speed of 10ms^-1(g=10ms^-2) Cal...

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  5. A 5 kg ball is thrown upwards with a speed of 10ms^-1(g=10ms^-2) Fin...

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  6. Calculate the electricity bill amount for a month of April, if 4 bulbs...

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  7. An object is made to fall from different heights 20 cm, 40 cm and 60 c...

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  8. An object is made to fall from different heights 20 cm, 40 cm and 60 c...

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  9. Define power. A boy of mass 45 kg climbs up 20 steps in 20 sec. it eac...

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  10. A truck and a car are running with same velocity. Which of the tow has...

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  11. Give an example of electrical energy converted into light energy.

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  12. What are two types of potential energy? Give two examples of each.

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  13. Define K.E. and derive the expression for K.E.

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  14. The kinetic energy of a body of mass 15 kg is 30 J . What is its momen...

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  15. An object of mass 15 kg moving with a uniform velocity of 4ms^-1. What...

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  16. What is the work to be done to increase the velocity of a car form 30 ...

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  17. Find the energy possessed by an object of mass 10 kg when it is at a h...

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  18. A boy of mass 50 kg runs up a staricase of 45 steps in 9 s. If the hei...

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  19. An electric bulb of 60 W is used for 6 hours per day. Calculate the un...

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  20. A ball is dropped a height h. The velocity of the ball when it reaches...

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