Unit 1 Test Prep: Part 3 (Flashcards)

Front

The pressure in a fluid increases with depth because of the __________ of the fluid above.

Back

Weight

Front

Which of the following correctly describes how pressure in a liquid behaves?

A. It decreases with depth.
B. It is the same at all depths.
C. It increases with depth.
D. It only depends on the shape of the container.

Back

C. It increases with depth.

Front

The principle that states any change in pressure applied to a confined fluid is transmitted undiminished throughout the fluid.

Back

Pascal’s principle

Front

Which of the following factors affect the buoyant force on an object submerged in a fluid? (Select all that apply.)

A. The volume of the object
B. The density of the fluid
C. The mass of the object
D. The depth at which the object is submerged

Back

A. The volume of the object
B. The density of the fluid

Front

Explain why objects sink or float based on Archimedes' principle.

Back

• An object submerged in a fluid experiences a buoyant force equal to the weight of the fluid displaced.

• If the buoyant force is greater than the object’s weight, the object floats.

• If the object’s weight is greater than the buoyant force, it sinks.

• The buoyant force depends on the volume of fluid displaced, not the object’s weight.

Front

Rank the following objects in order of increasing buoyant force when fully submerged in water:

1. 1. A 5-liter wooden box.

2. 2. A 2-liter metal can.

3. 3. A 1-liter plastic bottle.

Back

3 < 2 < 1

Front

A person uses a hydraulic lift by applying a small force on a small piston. What happens to the large piston, and why?

Back

• The large piston moves upward.

• Pascal’s principle states that the pressure applied to the small piston is transmitted equally to the large piston.

• Since the large piston has a greater area, the force on it is larger, allowing heavy objects to be lifted with minimal effort.

Front

Correct this statement:

"According to Bernoulli’s principle, as the velocity of a fluid increases, the pressure in the fluid increases."

Back

Corrected statement:

"According to Bernoulli’s principle, as the velocity of a fluid increases, the pressure in the fluid decreases."

Front

Compare the behavior of fluids in a narrow pipe versus a wide pipe, based on Bernoulli’s principle.

Back

• Narrow pipe: As the fluid flows through a narrower section, its velocity increases and the pressure decreases.

• Wide pipe: In a wider section, the velocity decreases, and the pressure increases.

• This relationship between velocity and pressure is explained by Bernoulli’s principle.

Front

Which of the following is true according to Archimedes’ principle?

A. The buoyant force on an object is equal to the volume of the fluid displaced.
B. The buoyant force is always equal to the object’s weight.
C. The buoyant force on an object is equal to the weight of the fluid displaced by the object.
D. The buoyant force depends on the shape of the object.

Back

C. The buoyant force on an object is equal to the weight of the fluid displaced by the object.