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  1. The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV,
  2. Two poles of same strength attract each other with a force of magnitude F
  3. A satellite of mass m revolves around the earth of radius R at a height x from
  4. Consider a two particle system with particle having masses m₁ and m₂. If the first
  5. A particle free to move along X-axis has potential energy given as U(X) =k(1-e⁻ˣ²)