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  1. The respective speeds of the molecules are 1,2,3,4 and 5 km/s.
  2. A bomb of mass 30 kg at rest exploded into two pieces of masses 18 kg
  3. A particle free to move along X-axis has potential energy given as U(X) =k(1-e⁻ˣ²)
  4. A projectile is fired at 30°. Neglecting friction, the change in kinetic energy when
  5. An A.C source is rated at 220 V, 50 Hz. The time taken for voltage to change