Consider power cycles which use gas. a: Draw the P-v diagrams for the three power cycles and label each process: Diesel, Stirling, and Brayton cycle.
b: Draw the corresponding T-s diagrams for the three power cycles.
c: Draw the corresponding T-v diagrams for the three power cycles.
d: Write down and explain the thermal efficiency formulas for the cycles explicitly.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?