Concerns about our environment | Class 9 Physics Formula

Concerns about our environment
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The calorific value of fuel:  Amount of heat energy liberated on the burning of a fuel = (mass of fuel) × (calorific value of fuel)

or, Heat = mass x Calorific value

Solar constant :

Heat energy produced by incident solar radiation = (solar constant) ×  (Area) ×  (time) where solar constant

= 1.4 kJ m-2s-1 = 1.4 kWm-2.

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