Kevin completes his morning workout at the pool. he swims 4.00 × 10 3 m (80 laps in the 50.0-m-long pool) in 1.00 h. (a) what is the average velocity of kevin during his workout? (b) what is his average speed? (c) with a burst of speed, kevin swims one 25.0-m stretch in 9.27 s. what is kevin’s average speed over those 25 m?

you would expect a sound wave to speed up. - b)

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

i don't understand. explain it clearly