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  1. The 6563 Å line emitted by hydrogen atom in a star is found to be red shifted by 5Å
  2. A ball is thrown vertically downwards from a height of 20 m with an initially
  3. A man measures time period of a pendulum(T) in stationary lift. If the lift moves upwards
  4. The position x of a particle with respect to time t along x-axis is given
  5. A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰