An automobile traveling 91.0 km/h has tires of 64.0 cm diameter.

(a) What is the angular speed of the tires about their axles?
(b) If the car is brought to a stop uniformly in 40.0 complete turns of the tires, what is the magnitude of the angular acceleration of the wheels?
(c) How far does the car move during the braking?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.