A Thermopane window of area 3.1 m2 is constructed of two layers of glass, each 3.9 mm thick separated by an air space of 2 mm. If the inside is at 17◦C and the outside is at −24◦C, what is the heat loss through the window? The thermal conductivity of glass is 0.8 W/m · ◦ C and of air is 0.0234 W/m · ◦ C . Answer in units of kW.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed. gi) ifn 1, what will happen to the material when transformed material when