Engineering
Physics
Radiation
Question

A liquid in a beaker has temperature θ(t) at time t and θ0 is temperature of surroundings, then according to Newton's law of cooling the correct graph between loge(θ – θ0) and t is :

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Solution

 dTdt=k(TTs)

 ln|TTsT0Ts|=kt

ln(T – Ts) = ln(T0 – Ts) – kt