# Physics Quicksheets - Fluids and Solids

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 Author: awc1990 ID: 227860 Filename: Physics Quicksheets - Fluids and Solids Updated: 2013-07-23 12:08:06 Tags: Physics Quicksheets Fluids Solids Folders: Description: Kaplan Quicksheets - Chapter 5 Show Answers:

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1. Density (ρ)

[SI units: kg/m3]
2. Specific Gravity
Specific Gravity =   =      [No Units]

ρwater = 103 kg/m3
3. Weight (W)
W = ρgV
4. Pressure:
a scalar quantity defined as force per unit area:

[SI Units: Pascal = N/m2]

5. Pressure of a Static Fluid:
For static fluids of uniform density in a sealed vessel, pressure:

P = ρgh
6. Absolute Pressure
in a fluid due to gravity somewhere below the surface is given by the equation

P = P0 + ρgh

Absolute pressure is zero-referenced against a perfect vacuum, so it is equal to gauge pressure plus atmospheric pressure.
7. Gauge Pressure
Gauge pressure is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure. Negative signs are usually omitted.

Pg = Pabs - Penvironment
8. Continuity Equation
V1A1 = V2A2
9. Bernoulli's Equation:
P + ρv2 + ρgh = constant
10. Archimedes's Principle
difference between object's weight in air and weight in fluid:

Fbuoyant = ρfluidgVsubmerged

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