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  1. If doubly ionised lithium atom is hydrogen like with atomic number 3, the wavelength
  2. 1 Wb/m² equal to
  3. The minimum wavelength of X-rays emitted by X-ray tube is 0.4125Å
  4. A body projected vertically from the earth reaches a height equal to earth’s radius
  5. Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted