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  1. Which of the following quantities has units but not dimensions
  2. A block of mass m is placed on a smooth wedge of inclination θ
  3. A piece of iron is heated in a flame. It first comes dull red then becomes reddish
  4. A short magnet of magnetic moment M, is placed on a straight line. The ratio
  5. A particle moves from position r₁ = 3i + 2j -6k to position r₂ = 14i + 13 j+ 9 k