[填空题]
Pilots can be tested for the stresses of flying hjf.4oux, v 7zj8:rrmtighspeed jets in a sn xalxsf)20a*amg31-8i oj j whirling “human centrifuge,” which takes 1.0 min to turn thrigx 0 *axsma-oj jsfn38)1 la2ough 20 complete revolutions before reaching its final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$