Identifying the target population or target audience occurs during which step of the engineering design loop a identified the need b research the problem or c develop possible solutions

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..

a skateboard rolling across the street - apex