Arigid tank contains 1 kg of air (ideal gas) at 15 °c and 210 kpa. a paddle wheel supplies work input to the air such that final temperature is 97 "c. the specific heats are cp 1.005 kj(kg. k) and c-0.718 kj/(kg. k). determine the total work done in kj:

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.