Physics-
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Question

Heat energy produced by 150g of a fuel of Calorific value 8000 Cal g–1 is..

  1. 12 cross times 10 to the power of 5 end exponentJ    
  2. 5 12 cross times 10 to the power of 5 end exponent C a l    
  3. 12 cross times 10 to the power of 6 end exponentJ    
  4. 12 cross times 10 to the power of 6 end exponent C a l    

hintHint:

Calorific ValueL equals fraction numerator Q over denominator m end fraction

The correct answer is: 12 cross times 10 to the power of 5 end exponentJ


    Calorific ValueL equals fraction numerator Q over denominator m end fraction
    L equals 8000 C a l g to the power of negative 1 end exponent
    m = 150g
    Heat energy produced Q = Lm
    = 8000 x 150
    equals 120 cross times 10 to the power of 4 end exponent C a l
    equals 12 cross times 10 to the power of 5 end exponent C a l

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