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Fluid Mechanics

Authored by Edmer Frio-Aguilar

Science

12th Grade

Used 1+ times

Fluid Mechanics
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30 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A solid cube is fully submerged in water. Which of the following determines the magnitude of the buoyant force acting on the cube?

The mass of the cube

The volume of water displaced by the cube

The density of the cube material

The depth at which the cube is submerged

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two objects have identical volumes but different masses. When both are completely submerged in the same liquid, how do their buoyant forces compare?

The denser object experiences greater buoyant force

The less dense object experiences greater buoyant force

Both experience equal buoyant forces

The buoyant forces depend on the shape of each object

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A ship floats on saltwater while carrying cargo. When the ship enters a freshwater river, what happens to the ship's draft (depth of submersion)?

The draft decreases because freshwater is less dense than saltwater

The draft increases because freshwater is less dense than saltwater

The draft remains unchanged because buoyancy is independent of fluid density

The draft increases because the ship becomes heavier

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A spherical balloon filled with helium is submerged underwater and held in place by a string. Which statement best explains why the balloon pulls upward on the string?

Helium molecules repel water molecules

The buoyant force exceeds the weight of the balloon and helium combined

Water pressure creates an upward force on the balloon's surface

The balloon's material is naturally buoyant

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An object is placed in a container of water, and the water level rises from 500 mL to 625 mL. Based on this observation, what can be determined about the buoyant force?

The buoyant force equals the weight of 125 mL of water

The buoyant force cannot be determined without knowing the object's mass

The buoyant force depends on how long the object remains submerged

The buoyant force is greater than the object's weight

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A wooden block floats in water with 70% of its volume submerged. If this same block were placed in a denser fluid, what would likely happen?

A) A smaller percentage of the block would be submerged

B) A larger percentage of the block would be submerged

C) The entire block would sink regardless of fluid density

D) The percentage submerged would remain exactly 70%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An ice cube floats in fresh water, partially submerged. When it melts, what happens to the water level in the container?

The water level rises because the melted ice occupies more space

The water level drops because the melted ice occupies less space

The water level remains essentially unchanged because the buoyant force equals the ice's weight

The water level rises significantly, then drops as the water warms

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