dT (a) Newton's Law of heating: = k(T Tm), k ...

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dT (a) Newton's Law of heating: = k(T – Tm), k <0 dt A small metal bar, whose initial temperature was 25° C, is dropped into a large container of boiling water. How long will it take the bar to reach 90° C if it is known that its temperature increases 2° in 1 second? How long will it take the bar to reach 98° C? dT (a) Newton's Law of heating: = k(T – Tm), k <0 dt A small metal bar, whose initial temperature was 25° C, is dropped into a large container of boiling water. How long will it take the bar to reach 90° C if it is known that its temperature increases 2° in 1 second? How long will it take the bar to reach 98° C?