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  1. When sound is produced in an aeroplane with a velocity of 200 m/s horizontally,
  2. The wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π
  3. A step down transformer is used on a 1000 V line to deliver 20 A at 120 V
  4. A black body is heated from 27° C to 127° C. The ratio of their energies of radiations
  5. A bottle full of water in a space ship at 30⁰C is carried on the moon.