The free stream water temperature in the laminar boundary layer is t=25 °c. the temperature of the wall is tw 24°c. the velocity of water is 0.6 cm/s, distance from leading edge is 20 cm. determine the lo length x. hint: use the properties of water at 25°c and pr=6.21

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.