In this lesson, you learned about renewable energy resources and nonrenewable energy resources. think about the resources discussed in this lesson and select the one that you think is the most effective in all ways. think about the financial impact, the ability to be renewed, and the effectiveness of the energy that is produced. write a paragraph describing why the resource you have selected is the most efficient

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.