You hang a thin hoop with radius r over a nail at the rim of the hoop. you displace it to the side (within the plane of the hoop) through an angle \betaβ from its equilibrium position and let it go. what is its angular speed when it returns to its equilibrium position? assume the \beta = 60 \degreeβ=60°, r = 1 mr=1m.

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.