[填空题]
Pilots can be tested for the stresses of flying highnec;k ato9xmq83*sl 1 speed d7jr ,r k+tq,vhn8mh ,jets in a whirling “human centrifuge,” which takes 1.0 min rh8, +7rqmh djnt ,k,vto turn through 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? $rpm$