Show from the first principles that, for a perfect gas with constant specific heat capacities
expanding polytropically (i. e. according to the law pvn = constant) in a non-flow process,
the change of entropy can be expressed with usual notation, by the following equation.
2 − 1 =( − / − 1)(/)(2/1)

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

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

The higher the astm grain size number, the finer the gran is. a)-true b)-false