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  1. A stone falls freely under gravity.It covers distances h₁,h₂ and h₃
  2. If wavelength of a wave is λ=6000 Å, then wave number will be
  3. Fission of nuclei is possible because the binding energy per nucleon in them
  4. A person can see clearly objects only when they lie between 50 cm and 400 cm from
  5. Wave nature of light is verified by