You have a long pipe closed at one end and an electronic buzzer with which you can dial in different single frequency sounds. When you hold the buzzer near the end of the pipe, transmitting sound down the pipe, you determine that standing waves are established at frequencies of 66, 110, and 154 Hz. The frequency of 66 Hz is not necessarily the fundamental frequency. Determine the length of the pipe if the speed of sound in air is 343 m/s.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

How many atoms of nitrogen are in the chemical formula ni(w on

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.