Ch 15 slides

advertisement
Phases of matter
Higher order
solid
Lower order
liquid
gas
T
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Mesophases
some positional
and orientational
order
solid
Thermotropic
Liquid crystals
Smectic C
Smectic A
orientational
order
Nematic
liquid
T
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Straw Pressure
If you put your finger on top of a drinking straw
submerged in water, you can hold the water in the straw
when you draw it out of the water.
•
•
Draw a force diagram to show why this happens
If the water in the straw is 10cm high, what it the
pressure at the top and the bottom of the straw?
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Hydraulics
Consider a hydraulic lift, such as the one that lifts your car
at the repair shop. The system is in static equilibrium if
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Lifting a car
The hydraulic lift at a car repair shop is filled with oil. The car
rests on a 25-cm-diameter piston. To lift the car, a force is
applied to push down on a 6 cm diameter piston.
• What force will support a 1300 kg car level with the small
piston?
• If you lift the car up by 2m, by how much do you need to push
the small piston?
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Download
Related flashcards
Acoustics

37 Cards

Semiconductors

39 Cards

Create flashcards