A student is doing an experiment in science class. the instructions are to make a heterogeneous mixture and then separate all the components of the mixture back out again. She decides to use sand, gravel, salt, and water. Describe methods that she could use to separate the sand, the gravel, the salt, and the water apart from each other without losing any of those components

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.