Mix & Flow

Read on Your own

• Pages 8 to 17

A fluid is a anything that doesn’t have a fixed shaped and can flow.

Some gases at certain temperatures adhere to this definition

Fluids often transport something.

Log drives, O2 & CO2 in blood, sewage, slurpees

Fluids help refine a process.

Oils lubricate, water drills, steam to move turbines

Pure Substances & Mixtures

Pure substances are elements. You can’t separate them anymore. Anything else is a mixture.

Untitled Slide

Mechanical mixtures - think gravel.
Heterogeneous too.

Solutions, suspensions or colloids

Suspension - spring runoff
Colloid - milk
Solution - vinegar

Concentration is the g/ml

The measure of solute in solvent.

Water is considered the universal solvent (all other solvents are jealous).

Homeopathy is a very questionable, but fashionable, treatment involving increasingly lower concentrations of solute in solvent. To the point when there is a higher concentration of solute in tap water.

Saturation - when no more solute can be dissolved (the opposite of homeopathy).

Supersaturation - when you convince the solute to take a bit more (heating).

Solubility
Temperature, agitation, type of solute/solvent,

Viscosity is the internal friction

Cold honey is viscous
Glass is very viscous
Time is relatively, less viscous.

Buoyancy is the density of one material in another.

As temperature alters density, the bouyancy of a thing changes with both temperature and the solution it’s in.

Hot air balloon & high pressure day, boat in salt water

Buoyancy = weight in air - weight in water

Gases compress

Liquids not so much

Solids forgetaboutit

Pressure = F/A

10N/2msquared = 5 Pa

Pascal’s Law
Force is transmitted in a closed system equally

Pneumatic is gas

Hydraulic is liquid