A 100mm diameter steam pipe is covered by two layers of lagging. the insude layer is 40mm thick with K=0.07w/mk, the outside layer is 25mm thick with k=0.1w/mk. the pipe convey steam at a pressure of 1.7MN/m with 30k superheat. the outside temperature of the lagging is 24°C, if the steam pipe is 20m long, determine the heat loss per hour and the interface temperature of the lagging. neglect the temperature drop accross the steam pipe.​

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

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.

Apure substance is a)-mixture of various chemical elements or compounds b)-substance that has a fixed chemical composition throughout c)-mixture that is homogeneous (such as air) d)-all the answers