9. A centrifuge rotates so that 0.25 m from the center is traveling at 343 m/s (the speed of sound). How many RPM is this? What is its angular velocity? 10. What is the angular velocity (in rad/s and RPM) of the following: A. The hour hand of a clock. B. The minutes hand of a clock. C. The seconds hand of a clock. [13,101 RPM] [1372 rad/s] A. 1.45x10-4 rad/s = 0.0014 RPM B. 0.0017 rad/s = 0.017 RPM C. 0.105 rad/s = 1 RPM 11. Calculate the linear speed of the tip of each hand on the following clock: 12 11 0.05 m 10 0.15 m 9 8 7 0.12 m 6 5 No angular acceleration 4 P 12. A wheel is spinning at 5 rad/s. a. How many radians will it turn through in 20 second? b. How many revolutions is this? hr = min 7.25x10-6 m/s 2.55x10-4 m/s sec = 0.0126 m/s 13. A fan spins through 600 radians in 10 seconds. What is its angular velocity? + [a. 100 rad, b. 16 rev] [60 rad/s]