Properties of Fluids

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1.  Which of the following statements explain why a steel ship will float on water but a bar of steel will sink:
A. Because of the air in the ship’s hull, the overall density of the ship is less than the density of water.
B. The buoyant force on the ship is greater than the weight of the ship.
C. The densest part of the ship is the part that is out of the water.
D.When rolled into a sheet, steel is less dense than water.

2.  Force that acts over a certain area is called:
A. density.
B. pressure.
C. drag.
D. thrust.

3.  A submarine surfaces by:
A. Increasing its density.
B. Taking in more water.
C. Decreasing its density.
D. Decreasing its drag.

4.  The buoyant force of a fluid is equal to:
A. The weight of the object.
B. The weight of the fluid displaced by the object.
C. The pressure of the object.
D. The volume of the fluid.

5.  The relationship between buoyant force and weight of displaced fluid was stated by:
A. Archimedes.
B. Bernoulli.
C. Pascal.
D.Einstein.

6.  The flight of a bird is an example of:
A. A hydraulic system.
B. Bernoulli’s Principle.
C. Archimedes’ Principle.
D. Pascal’s Principle.

7.  The resistance of a liquid to flow is called:
A. buoyancy.
B. pressure.
C. viscosity.
D. density.

8.  An object will float in a fluid if the __ of the object is less than that of the fluid:
A. pressure.
B. drag.
C. buoyancy.
D. density.


Grade exam.