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  1. Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units
  2. Light of two different frequencies whose photons have energies 1eV
  3. Two forces of magnitude 8N and 15N respectively act at a point so as to make the resultant force
  4. A body with mass 5 kg is acted upon a force F=(-3i+4j) N.If its initial velocity at
  5. The order of radius of the nucleus of an atom is