# Unit 5 Concepts Quiz

10 Questions | Total Attempts: 118  Settings  • 1.
While swimming near the bottom of a pool, you let out a small bubble of air.  As the bubble rises toward the surface, what happens to its diameter?
• A.

Bubble diameter decreases

• B.

Bubble diameter stays the same

• C.

Bubble diameter increases

• 2.
Imagine holding two identical bricks in place under water.  Brick 1 is just beneath the surface of the water, while brick 2 is held about 2 feet down.  The force needed to hold brick 2 in place is:
• A.

Greater

• B.

The same

• C.

Smaller

• 3.
An object floats in water with 3/4 of its volume submerged.  What is the ratio of the density of the object to that of water?
• A.

1/4

• B.

3/4

• C.

4/3

• D.

1/2

• 4.
Water flows through a 1-cm diameter pipe connected to a 1/2-cm diameter pipe.  Compared to the speed of the water in the 1-cm pipe, the speed in the 1/2-cm pipe is:
• A.

one quarter

• B.

One half

• C.

The same

• D.

Double

• E.

Four times

• 5.
A person’s blood pressure is generally measured on the arm, at approximately the same level as the heart.  How would the results differ if the measurement were made on the person’s leg instead?
• A.

The blood pressure would be lower

• B.

The blood pressure would be higher

• C.

The blood pressure would stay the same

• 6.
Density is...
• A.

Proportional to both mass and volume

• B.

Proportional to mass and inversely proportional to volume.

• C.

Inversely proportional to mass and proportional to volume

• D.

Inversely proportional to both mass and volume

• 7.
Substance A has a density of 3.0 g/cm3 and substance B has a density of 4.0 g/cm3.  In order to obtain equal masses of these two substances, the ratio of the volume of A to the volume of B will be equal to
• A.

1:3

• B.

4:3

• C.

3:4

• D.

1:4

• 8.
Consider three drinking glasses.  All three have the same area base, and all three are filled to the same depth with water.  Glass A is cylindrical.  Glass B is wider at the top than at the bottom, and so holds more water than A.  Glass C is narrower at the top than at the bottom, and so holds less water than A.  Which glass has the greatest liquid pressure at the bottom?
• A.

Glass A

• B.

Glass B

• C.

Glass C

• D.

All Equal

• 9.
50 cm3 of wood is floating on water, and 50 cm3 of iron is totally submerged.  Which has the greater buoyant force on it?
• A.

The wood

• B.

The iron

• C.

Both have the same buoyant force

• D.

Cannot be determined without knowing their densities

• 10.
A 10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead.  Which has the greater buoyant force on it?
• A.

The aluminum

• B. Back to top