Ideal gas is confined to a volume of Vi within a piston-cylinder assembly at a pressure of pi . The piston-cylinder assembly is well-insulated. The gas is allowed to expand to a volume Vf in two ways: (1) reversibly, and (2) suddenly and irreversiibly. The pressure at the final state in both cases is larger than the pressure in the surroundings, p0. Answer the following questions: a. Find the work done in the reversible process and irreversible/sudden process
b. Find the pressure at the final state in the two processes described here.
c. Show that the pressure at the end of the reversible process is always less than the pressure at the end of the irreversible process.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg. m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?

The quality is zero at a)-the saturated vapour state b)-the saturated liquid state c)-the saturated liquid-vapour mixture state d)-none of the states in the other answers