A closed system contains 3 kg of R-134a, initially at 10 C and 90 kPa (State 1), and undergoes an internally reversible, isothermal process until the volume of the R-134a reaches 0.056 m3 (Stage 2). The system returns to State 1 by an irreversible process and the heat transfer for the return process is 3.2 kJ. Determine Q12, W12, W21, and

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?