Fluids LN.docx

# Fluids LN.docx - 1 Fluids(= liquids or gases Two...

• Notes
• 4

This preview shows 1 out of 3 pages.

1 Fluids (= liquids or gases) Two definitions: , F = force perpendicular to area, [p] = N / m 2 = pascal (Pa) [ ] = kg / m 3 or gram / cm 3 = g / cm 3 , "specific gravity" = = 1 water 7.9 iron 11.9 Pb 2.7 Al _____________________________ * ___________________________________ Consider a bucket of water. What is the pressure at the bottom of the bucket due to the weight of the water ? Will now show that p = g h , More generally, , where h is the change in the depth below the surface of the water. This derivation assumes that density = constant, which it is for the case of water, be- cause water is incompressible. area A h = |  total mass m A h V = A h

Subscribe to view the full document.

2 Air consists mostly of oxygen and nitrogen molecules. At room temperature, the molecules have thermal energy and are moving around rapidly (speed 400 m/s), colliding with each other and with every exposed surface. The pounding of the air molecules on a surface, like the pitter-pat of rain on the roof, adds up to a large force per area: p atm = 14.7 psi. At a given depth, a fluid exerts the same pressure in every direction.
You've reached the end of this preview.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern