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  1. A circular road of radius 1000m has banking angle 45°.The maximum safe speed of a car
  2. Energy bands in solids are a consequence of
  3. Fusion reaction takes place at high temperature because
  4. A radioactive substance decays to 1/16th of its initial activity in 40 days.
  5. Kepler’s third law states that square of period of revolution (T) of a planet