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  1. A tuning fork gives 4 beats with 50 cm length of a sonometer
  2. Two sources of sound placed close to each other are emitting progressive waves
  3. An α-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic
  4. A ball is dropped into a well in which the water level is at a depth h below the top
  5. A metal bar of length L and area of cross-section A is clamped between two rigid