A dolphin uses echo location to find fish. The fish are 22.5m away. a- What is the speed of sound in water if it is 0.03s between the dolphin emitting and
receiving the sound wave?

yall pls help me out here I got an exam tomorrow

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Distinguish between linear momentum and angular momentum

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.