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  1. A block is moving up an inclined plane of inclination 60° with velocity of 20 ms⁻¹
  2. Which of the following phenomena does not show the wavenature of light?
  3. Two metal wires of identical dimensions are connected in series. If σ₁ and σ₂ are
  4. Mass defect is known as
  5. A source is moving towards an observer with a speed of 20 m/s and having frequency