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Question

If the value of atmospheric pressure is 106dyne cm2, it value in SI units is:
  1. 104Nm2
  2. 106Nm2
  3. 105Nm2
  4. 103Nm2


Solution

The correct option is C 105Nm2
Pressure = FA
Taking dimensions on both sides
[P]=[MLT2][L2]=[ML1T2]
106×[1g1kg]1[1cm1m][1s1s]2=105
106dyne cm2=105Nm2

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