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ICSE Class 7 Physics Question 5 of 50

Heat — Question 5

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Question

Question 5

Convert -40°F to the Celsius scale.

Answer

°C = 59\dfrac{\text{5}}{\text{9}} (F - 32)

= 59\dfrac{\text{5}}{\text{9}} (-40 - 32)

= 59\dfrac{\text{5}}{\text{9}} x (-72)

= - 40

So -40°F = -40°C.