Steam at 200°c flows in a 1 meter cast iron pipe (k 80 w/m"c) whose inner and outer diameters are d1 0.20 m and d2 0.22 m. the pipe is exposed to room air at 25°c. the heat transfer coefficients at the inner and outer surfaces of the pipe are 75 and 20 w/m2 "c, respectively. the pipe is to be covered with 3.4 cm of glass wool insulation (k = 0.05 w/m·°c). determine the rate of heat loss (w) from the pipe.

Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volurge for a gas is much higher than the average volume for a liquid. d)-there is no difference

State the stress optic law in two dimension and obtain an expression for the same.

Derive the 2-d finite difference equation for a uniform grid for a node: a) at a plane surface with a uniform heat flux b) at an internal corner with convection