To modify a block on disk, we must read it into main memory, perform the modification, and write it back. Assume that the modification in main memory takes less time than it does for the disk to rotate, and that the disk controller postpones other requests for disk access until the block is ready to be written back to the disk. For the Megatron 747 disk, what is the time to modify a block?

Are special combinations of keys that tell a computer to perform a command. keypads multi-keys combinations shortcuts

15: 28read the summary of "an indian's view of indian affairs."15 betterin "an indian's view of indian affairs," it is asserted that conflicts could be reduced if white americansunderstood native americans..pswhich of the following would make this summary more complete? eleo the fact that chief joseph believes the great spirit sees everythinthe fact that chief joseph was born in oregon and is thirty-eight years oldo the fact that chief joseph states that he speaks from the hearthehehethe fact that chief joseph of the nez percé tribe made this claimebell- ==feetle===-felsefe ==submitmark this and retum.=

What are "open-loop" and "closed-loop" systems