Calculate the size of a gas filled accumulator needed to supply a hydraulic system with 25 litres of fluid from a pressure of 20 mpa to a pressure of 12 mpa. the accumulator is initially charged to a pressure of 8 mpa. the expansion and compression takes place rapidly and the gas is nitrogen with an adiabatic process exponent of 1.4.

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

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?