1. Tardigrade
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  4. The room temperature is 20°C. Water in a container cools from 55°C to 45°C in 8 minutes. How much time will it take in cooling from 45°C to 35°C

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Q. The room temperature is 20$^\circ$C. Water in a container cools from 55$^\circ$C to 45$^\circ$C in 8 minutes. How much time will it take in cooling from 45$^\circ$C to 35$^\circ$C

Thermal Properties of Matter

Solution:

$R\propto(\theta-\theta_0).Hence\,R_1\propto(50-20)\,and\,R_2\propto(40-20).Thus\,R_1/R_2=3/2.Since \,same \,amount\,of \,heat\,is\,lost\,in\,both\,the\,cases\,therefore\,R_1t_1=R_2t_2$