Objectives - phys161

chapter 10

Vocabulary

Density, Pressure, Hydrostatic Equilibrium, Buoyancy, Bouyancy Force, Barometer, Viscosity, Continuity, Pascal (unit of pressure), Streamline, Flow Tube.

Objectives. At this point in the course, the student should

1. Use an object's density to relate its mass and volume.
2. Determine the force exerted by a fluid on an object given the pressure of the fluid and the area of contact.
3. Use Pascal as a unit of pressure.
4. Recognize that the atmosphere exerts a pressure, which decreases with height, and has a value of about 100,000 Pa at sea-level.
5. Recognize that a fluid exerts the same pressure in all directions at a given point.
6. Apply the principle that the pressure is the same at all points along a horizontal plane in the fluid.
7. Apply hydrostatic balance (balance between weight and the vertical gradient in pressure) to predict the pressure at any depth in a fluid.
8. Explain how a mercury barometer works and how the depth of the fluid in the barometer depends on its density.
9. Determine the buoyancy force on an object immersed in a fluid.
10. Recognize that the net force on a floating object is zero, so the weight must balance the buoyancy force.
11. Apply Achimedes' principle.
12. Predict whether an immersed object will rise or sink.
13. Apply the equation of continuity to determine the change in speed of a fluid given a change in cross-sectional area.
14. Utilize conservation of energy (Bernoulli's equation) to predict the change in speed of a fluid given the change in height and/or change in applied pressure.