[填空题]
A centrifuge in a medical laboratory rotates at a rotational speed *t.xubs fx*d j*,c lm9of 3600xk.-qt.bok9n rev/min. When switched off, it rotates 50.0 timestn -q .9.bxokk at a constant angular acceleration before coming to rest. (a) Determine the initial angular speed of the centrifuge. $rad/s$ (b) Determine the angle (in radians) through which the centrifuge rotates before coming to rest. $rad$ (c) Calculate the constant angular acceleration of the centrifuge. $rad/s^2$ (d) Calculate the time necessary for the centrifuge to come to rest. $s$