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  1. The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is
  2. Two coaxial solenoids are made by winding thin insulated wire over a pipe
  3. A wave in a string has an amplitude of 2cm. The wave travels in the positive direction
  4. A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession.
  5. A body is thrown upward from ground covers equal distances