A copper tube with circular cross section has length L 5 1.25 m, thickness t 5 2 mm, and shear modulus of elasticity G 5 45 GPa. The bar is designed to carry a 300 N m? torque acting at the ends. If the allowable shear stress is 25 MPa and the allowable angle of twist between the ends is 2.58, what is the minimum required outer diameter d?

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.

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.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false