As the comet slows down, energy is lost from the system. As the kinetic energy of the system increases, the gravitational potential energy of the system decreases. As the comet's kinetic energy increases, the gravitational potential energy of the system also increases. As the comet slows down, the kinetic energy of the system decreases. External work must be done on the system to speed up the comet.

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.