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  1. In stretching a spring by 2 cm, energy stored is given by U. Had is been stretched
  2. A student performs an experiment to determine the Young’s modulus of a wire
  3. A disc of mass 100 g is kept floating horizontally in air by firing bullets
  4. Temperature is a measurement of coldness or hotness of an object.
  5. Three cells, each of e.m.f 1.5 V and internal resistance 1 ohm are connected in parallel