Physics: Ch 24C -Heat Radiation: Test Your Knowledge (6 of 20) Newton's Law of Cooling

We will find time=? for a sphere to cool from 80C to 65C given that it took t=30s for the sphere to cool from 95C to 80C and the temperature of the room Temp=20C.

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[aqeelshah]

Thanks professor you are very respectful teacher.

[warrickdawes]

It's a little surprising because you used 80 instead of 95 as the initial room temperature in the denominator. Easy mistake to make. It's 68.7 seconds using the correct initial temperature.