Consider a 1.5 m high and 3 m wide solar collector that is oriented horizontally. The back side of the absorber is heavily insulated. The absorber plate and glass cover, which are spaced 2.5 cm apart, are maintained at 80C and 40C, respectively. Determine the rate of heat loss from the aborber plate due to natural convection. 1

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?

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.