8. At t = 0 a motorized wheel has an angular velocity of 24.0 rad/s. It increases its rotational speed at a rate of 30.0 rad/s2 until t = 2.00 s. Then, the power is turned off and it turns through 432 radians as it slows to a stop with constant angular acceleration. a) Through what total angle did the wheel turn between t = 0 and the time it stopped? b) What was the magnitude of its acceleration as it slowed down? c) At what time t did it stop?

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.