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# Fluids

### Introduction to Fluids

Density EQ Density = (mass)/(volume) = m/v
Pressure EQ Pressure = (Force acting on a surface)/(Area of that surface) = P = F/A; units are Pascals; 1 Pa = 1 N/m^2; also lb/in^2
Boyle’s Law EQ (pressure)(volume) = constant PV = constant
Buoyancy (1) An upward force due to the difference in pressures in a submerged object
Buoyancy (2) The force acting upward on an object in a fluid equals the weight of the fluid displaced
Boyle’s Law The product of the (pressure of a gas)(volume of gas) is constant
Atmospheric Pressure Caused by the molecules being drawn downward by gravity of the earth creating a surface pressure; 15 lb/in^2
Barometer a device for measuring atmospheric pressure;
Pascal’s Principle The pressure on a confined fluid is equal at all points
Bernoulli’s Principle The pressure in a flowing fluid is inversely proportional to the speed.
Created by: brownglarry