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  1. A nucleus of mass number 220, initially at rest, emits an α-particle. If the Q-value
  2. The liquid-crystal phase of a matter is called
  3. The half-life of radioactive element is 600 yr. The fraction of sample
  4. A particle is released from rest from a tower of height h, i.e,t₁ : t₂ : t₃ is
  5. If Q, E and W denote respectively the heat added, change in internal energy