Recent content by dzkl

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    Time to take for water to cool down.

    I saw the mistake...it's suppose to be log base e thus the negative is canceled out. Btw, you I've studied Newton's Law
  2. D

    Time to take for water to cool down.

    My question refers to the cooling of water in a well-insulated , cylindrical cup that is opened at the top. 0.336Kg of water at 84degCel is poured into the cup which is left to stand on a table at an ambient temperature of 25degCel. The specific heat capacity of water is 4150 J Kg^-1 K^-1 and...
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    Calculating Steady State Heat Transfer

    A straight, uniform circular pipe of internal diameter of 88.43 mm and external diameter of 118.38 mm carries hot water at 63.67 deg cel. The pipe has a thermal conductivity of 247 Wm^-1 K^-1. how to calculate the steady-state rate of heat transfer per unit length, in W m^-1, when the outside...
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