Acyclist is pedaling at 15 mph when a sudden 20-mph headwind comes up. assume a frontal area of 3.9 ft and a drag coefficient of 0.88. neglect rolling resistance. (p0.00238 slug/ft3) (a) draw a freebody diagram of the cyclist (b) calculate the pedaling force to maintain speed (c) calculate the power required

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.

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false