Air contained in an upright piston/cylinder arrangement is compressed from an initial pressure of 10 atm. and volume of 0.42m^3 to a final pressure of 25 atm. if the atmospheric pressure is 1.013 bar and the cylinder contains 5kg of air, find the final temperature, the work done and the heat transfer if the expansion occurs: isothermally, polytropically with an index of expansion of 1.3, isentropically with γ = 1.4.

What precautions should you take to prevent injuries when dealing with heavy loads?

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise