20. A cougar runs at a rate of 41 m/s for 3 seconds, then speeds up and goes 90 meters at a rate of 50 m/s. He slows down and runs 190 meters in 10 seconds. What is his average speed?

Anybody wanna ? (picture included? )

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.

What word chemical equation describes cavendish’s experiment with zinc?