Question

Satellites orbiting the earth have finite life and sometimes debris of satellites fall to the earth. This is because

Options :

  1. the solar cells and batteries in satellites run out

  2. the laws of gravitation predict a trajectory spiralling inwards

  3. of viscous forces causing the speed of satellite and hence height to gradually decrease

  4. of collisions with other satellites

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Answer :

of viscous forces causing the speed of satellite and hence height to gradually decrease

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