Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 57 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 9.5 kw from the compressor to its surroundings. assuming the ideal gas model for air and neglecting kinetic and potential energy effects, determine the power input, in kw.

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.