# Newtons law of cooling

**Question description**

Newtons law of cooling is given by

θ =θ0e−kt , where the excess of temperature at zero

time is θ

◦

0C and at time t seconds is θ

◦C. Determine

the rate of change of temperature after 40s, given

that θ0=16◦C and k=−0.03

is given byθ =θ0e−kt , where the excess of temperature at zero

time is θ

◦

0C and at time t seconds is θ

◦C. Determine

the rate of change of temperature after 40s, given

that θ0=16◦C and k=−0.03

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