This preview shows page 1. Sign up to view the full content.
Unformatted text preview: molecules in every cubic centimeter moving about at speeds of hundreds of meters per second , so yes, they are going to bump into each other! At the Earth's surface at sea level there is about 100 kilopascals of pressure exerted all over your body. For planet atmospheres, scientists will usually use a unit called a " bar " equal to 100 kilopascals, so the Earth's surface pressure at sea level is about 1 bar. That pressure is equivalent to about 1 kilogram pressing down in one Earth gravity on every square centimeter. If an adult pinky is about 1 centimeter in width (more or less), your body has quite a lot of square centimeters of surface area. So why do you not feel all that weight pushing you down at the Earth's surface? As described in the figure below, the air pressure pushes in all directions equally and the pressure of the fluid in your body pushing outward balances the air pressure....
View Full Document
This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.
- Fall '10