5.6 Demo - squirting water column

[cid:image001.jpg@01CC88EF.74EC5B70]
· The bottom hole squirts water the furthest
· Because the water at the bottom has the greatest pressure
· Because in the formula ∆p = h × ρ × g, ρ is constant, g is constant and h is large
· So ∆p = large

5.6

· 5.6 recall and use the relationship for pressure difference:

pressure difference = height × density × g
∆p = h × ρ × g

∆p = pressure of the fluid (N/m2 or Pa)
h = height of the fluid (m)
ρ = density of the fluid (kg/m3)
g = gravitational field strength (N/kg)

5.5 Demo 2 - Collapsing Bottle

· Collapsing Bottle

[cid:image001.jpg@01CC88ED.9E7F20A0]

5.5 Demo 1 - Magdeburg Hemispheres

· Magdeburg Hemispheres

[cid:image001.jpg@01CC88ED.8C0B76D0]
· And here are the horses I was talking about! http://www.youtube.com/watch?v=7bJkaFByiA0&feature=related

5.5

5.5 understand that the pressure at a point in a gas or liquid which is at rest acts equally in all directions

5.4 Harder questions on Pressure

5.4 Harder questions on Pressure

07 October 2011

16:30

·         Collins, p.107, Q.4.

1^st person à p= Force/area = 400N/0.0025=160’000 Pa = 160kPa

Elephant à p = Force/area = 5000N/(piex10^2)

                                                       = 5000/0.0314=159’000 Pa = 159 kPa

2^nd Person à p= Force/area=400N/0.00005= 8’000’000 Pa =8000 kPa

5.4 Model answers to Written questions

<<Answers to written questions.ppt>>

See the full gallery on Posterous

Answers to written questions.ppt Download this file