Which of the following is true for projectile motion? check all that apply. a. objects in free fall are undergoing projectile motion b. objects in projectile motion can be noticeably slowed by air resistance. c. objects in projectile motion always accelerate vertically downward at g=9.8 m/s2. d projectile motion can occur in either one or two dimensions.

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.