The structure has two frictionless pulleys around which a string is wrapped. if w = 46 lb, determine a force system that is equivalent to the forces applied by the string, where this force system consists of a single force, and specify the x coordinate of the point where the force’s line of action intersects the x axis.

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

The two required components for a generator

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line