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  1. The oscillating frequency of a cyclotron is 10 MHz. If the radius of its Dees is o.5 m,
  2. Two identical flutes produce fundamental notes of frequency 300 Hz at 27° C
  3. For a cubic crystal structure which one of the following relations
  4. The periodic waves of intensities I₁ and I₂ pass through a region at the same time
  5. The masses of three wires of copper are in the ratio 1:3:5 and lengths