Chapter
9
Solids,
Liquids, & Gases
Bernoulli's
Equation:
(11)
Bernoulli's
equation states that the sum of the pressure (P), the kinetic
energy per volume ()m,
and the potential energy per unit volume ()
has the same value at all points along a streamline.
(12)
Example
14
Using
the information from the previous example, suppose the pressure
in the fire hose is 350 kPa. What is the pressure in the nozzle?
Solution:
Example
15
Water
flows with constant speed through a garden hose that goes up
a step 20.0 cm high. If the water pressure is 143 kPa at the
bottom of the step, what is its pressure at the top of the step?
Solution:
Example
16
Repeat
the previous example with the following additional information:
(a) the crosssectional area of the hose at
the top of the step is half that at the bottom of the step, and (b) the
speed of the water at the bottom of the step is 1.20 m/s.
Solution:
Torricelli's
Result:
(13)
Venturi
Effect:
Rapidly
moving fluids sustain less pressure than slowly moving fluids.
Air
foils
On
to some more examples
