Physics-
General
Easy

Question

If stack P with rightwards arrow on top equals stack Q with rightwards arrow on top then which of the following is NOT correct :

  1. stack P with hat on top equals stack Q with hat on top    
  2. vertical line stack P with hat on top vertical line equals vertical line stack Q with hat on top vertical line    
  3. P stack Q with hat on top equals Q stack P with hat on top    
  4. stack P with rightwards arrow on top plus stack Q with rightwards arrow on top equals stack P with hat on top plus stack Q with hat on top    

The correct answer is: stack P with rightwards arrow on top plus stack Q with rightwards arrow on top equals stack P with hat on top plus stack Q with hat on top

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