Q2: A drop of liguid foluen is kept al uniform tempenkure t 299 K and is suspended in air by a fine wire. The initiel radius r= 2mm. The vapor pressure of foluene at 299K is =384 K and the dessily of liguid toluene is 866 ky Im 3. Derive equation for the time tp for the drop o evupurete Completely in a large volume of still air Calculate the tine in seconds for Complete evaporahion.

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Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?