Question

hot body is allowed to cool in surrounding which is at 35 degree celsius at what temperature will the rate of cooling be exactly half at the 75 degree Celsius

Answer 1

55°C

Explanation:

The rate of cooling is directly proportional to the difference of the temperature.

$r_2=r_1 /2$ (given)

ΔT₁=75-35 = 40

$\frac{r_1}{r_2}=\frac{40}{T-308K}\\2=\frac{40}{T-308K}\\T=328 K\\T=(328-273) =55^oC$

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