An ideal Stirling cycle uses 0.12 kg of air as the working fluid. The lower temperature at which energy is exchanged is 300 K while the upper temperature is 2000 K. Air is at 150 kPa at the beginning of compression and the peak pressure is 3 MPa. Assume that an ideal regenerator is used. Determine a) the energy captured and supplied by the regenerator, b) the net work from the cycle, c) the thermal efficiency of the cycle. Assume constant specific heats.

Achild throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. the ball leaves her hand 1.00 m above the ground. how long is the ball in flight before it hits the ground?

1. consider the case in which air fills air shocks on a truck trailer. the pressure in the shocks is 2 mpa. the temperature is 300 k. the diameter of the shock piston is 10 cm and the initial length of the cylindrical cavity containing the compressed air is 40 cm. a. the truck is gradually loaded over a period of a day in a static setting. the temperature is held constant for the atmosphere and thus for the gas shock. calculate the compressibility of the air in the shock for this condition when the truck is initially being loaded. b. if the shocks were loaded in a dynamic setting by driving over bumps, what would be the compressibility? state your assumption. c. what is the initial load on the shock if the shock is in an atmospheric 100 kpa? d. if the shock is compressed using the process described in part a, and the air shock compressed air cavity length decreases to 20 cm, what is the additional load applied to the shock?

J. j. thomson’s experiment disproved the theory that an atom