Lecture 01&02 PHYS122

Lecture 01&02 PHYS122 - Bertrand Dano Bertrand Dano...

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Unformatted text preview: Bertrand Dano Bertrand Dano Topic#1: Fluid sciences Bertrand Dano Different phases of matter? Solid Solid Solid Gas Gas Gas Liquid Liquid Liquid Plasma Plasma Bertrand Dano Solids Have definite volume Have definite shape Molecules are held in specific locations by electrical forces vibrate about equilibrium positions Can be modeled as springs connecting molecules Bertrand Dano Liquid Has a definite volume No definite shape Exist at a higher temperature than solids The molecules wander through the liquid in a random fashion The intermolecular forces are not strong enough to keep the molecules in a fixed position Bertrand Dano Gas Has no definite volume Has no definite shape Molecules are in constant random motion The molecules exert only weak forces on each other Average distance between molecules is large compared to the size of the molecules Bertrand Dano Plasma A plasma is typically an ionized gas "Ionized" means that at least one electron has been dissociated from a proportion of the atoms or molecules. The free electric charges make the plasma electrically conductive so that it responds strongly to electromagnetic fields. Bertrand Dano Question What weighs more: a ton of feathers or a ton of bricks? A ton of feathers A ton of bricks Bertrand Dano Fluid Mass and Weight: Density V m = The density of a fluid is defined as mass per unit volume....
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Lecture 01&02 PHYS122 - Bertrand Dano Bertrand Dano...

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