Why are telephone numbers seven digits

Consider: Bestselling books feature it in their titles, (e.g., The Seven Habits of Highly Effective People), articles use it to intrigue readers (e.g., Seven Characteristics of Emotionally Strong People), and the mere sight of three sevens standing side-by-side can make us shriek with excitement—especially if we happen to be standing by a slot machine with a plastic bucket of quarters.

Explanation:

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..