In ambient air at tinf= 35°c for the following configurations: or the tollowing configurations: a)-calculate the total heat transfer (q) from a building with four equally-sized 30m-tall and 15m-wide vertical walls. after sunset, one of the walls is 45°c, and the other three are at 40°c. the roof is 15m by 15m, at a temperature of 50°c.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Fluids at rest possess no flow energy. a)- true b)- false

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