PRESSURE NOTES
You should have
notes on and/or understand the following ideas, concepts or terms.
I have scanned some text book pages/notes in for you but you should have the
notes from the lessons.
If all else fails you could even resort to using a book, not very hi-tech
but I hear they are sometimes useful
Notes Page 1 [Liquid and gas pressure]
Notes Page 2 [Upthrust and floating]
Notes Page 3 [Fluid flow and viscosity]
Notes Page 4 [Laminar and turbulent flow,
continuity and Bernoulli]
Interactive animations: Hydrostatic pressure and Bouyancy
More comprehensive notes on Continuity Equation and Bernoulli's equation [WORD download]
Battleships
and bathtubs [WORD download question and solution]
Ice Cubes [WORD download question
and solution]
|
Concept |
|
|
| Pressure = Force / Area |
| Liquid Pressure = ρ g h |
| How this is calculated from a column of liquid (area A height h) |
| Gauge Pressure and absolute pressure; P = P 0 +ρ g h |
| Independence of shape on pressure |
| Hydraulic systems F 1 A 1 =F 2 A 2 |
| Flow of liquid through a pipe - the conservation of mass |
| Equation of continuity - A 1 v 1 =A 2 v 2 |
| Development of this idea combining conservation of energy to get Bernoulli equation |
| P 1 + ½ ρ v 1 2 + ρ g h 1 = P 2 + ½ ρ v 2 2 + ρ g h 2 (incompressible fluid) |
| The venturi meter used to measure pressure difference and hence speed of a flowing liquid. |
|
An
understanding of the following terms and quantities
|
| How aeroplanes fly and assorted nonsense including how to throw a curveball. |
| Why plumbing systems have a vent pipe (foul pipe) |
| Whether of not you can float a battleship in a bath and why |
| All about melting ice cubes that have nails in them |