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  1. A boy whirls a stone in a horizontal circle of radius 1.5 m and at height 2.0 m
  2. A gas is suddenly expanded such that its final volume becomes 3 times
  3. A rocket with a lift-off mass 3.5 x 10⁴ kg is blasted upwards with an initial acceleration
  4. Light of wavelength 500 nm is incident on a metal with work function 2.28 eV.
  5. Copper of fixed volume V is drawn into wire of length l. When this wire is subjected