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  1. A wheel has moment of inertia 5 x 10⁻³ kgm² and is making 20 revolutions per sec
  2. A car of mass m starts from rest and accelerates so that the instantaneous
  3. A stone of mass 1kg is tied to a string 4m long and is rotated at constant speed
  4. The work function of a substance is 4.0 eV. The longest wavelength of light
  5. In intrinsic semiconductor at room temperature number of electrons and holes are