Agas is compressed isothermally in a piston-cylinder assembly from 7.6 bar, 77 °c to 3.05 bar. determine the work and heat transfer, kj/kg, for the following gases. a) air b) hydrogen

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

In the winter, in order to keep the classroom steadily at 68 f before 10 pm, heating with an average rate of 42,000 btu/hr is provided. assume the outdoor temperature maintains at 32°f, determine the electrical power (kw) required to (a) operate a reversible heat pump (b) operate a real heat pump with a cop (7) of 4.5 and (c) operate an electrical-resistance heater.