2. Which statement(s) about star lifespans are true for stars A (1.2 times the size of the sun) and B (0.8 times the size of the sun? a) Star A will live longer than B b) Star A will live longer than the sun c) Star B will live longer than the sun d) Star B will live longer than A e) Stars A and B will have the same lifespan​

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.