Suppose a photon with an energy of 1.60 ev strikes a piece of metal. if the electron that it hits loses 0.800 ev leaving the metal, what is the kinetic energy of the electron once it has broken free of the metal surface?

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.