Question 1

A block of styrofoam floats on water while a same size block of lead lies submerged in the water. The buoyant force is greatest on the

Accepted Answer

A)   styrofoam.
B)   lead.
C)   is the same for both

Question 2

The depth to which an inverted drinking glass must be pushed beneath the surface of water so that the volume of enclosed air is squeezed to half is

Accepted Answer

A)   76 cm.
B)   29.4 m.
C)   10.3 m.
D)   20.6 m.
E)   14.7 m.

Question 3

A helium-filled balloon released in the atmosphere will rise until

Accepted Answer

A)   atmospheric pressure on the bottom of the balloon equals atmospheric pressure on the top of the balloon.
B)   the pressure inside the balloon equals atmospheric pressure.
C)   the balloon and surrounding air have equal densities.
D)   all of these
E)   none of these

Question 4

The Bernoulli effect causes passing ships to be drawn together when the ships are close and moving in

Accepted Answer

A)   opposite directions.
B)   the same direction.
C)   either the same or opposite directions.

Question 5

Wind blowing over the top of a hill

Accepted Answer

A)   increases atmospheric pressure there.
B)   decreases atmospheric pressure there.
C)   does not affect atmospheric pressure there.

Question 6

The faster a fluid moves, the

Accepted Answer

A)   greater its internal pressure.
B)   internal pressure is unaffected.
C)   less its internal pressure.

Question 7

A bubble of air released from the bottom of a lake

Accepted Answer

A)   alternately expands and contracts as it rises.
B)   becomes larger as it rises.
C)   rises to the top at constant volume.
D)   becomes smaller as it rises.
E)   none of these

Question 8

In drinking soda or water through a straw, we make use of

Accepted Answer

A)   surface tension.
B)   Bernoulli's principle.
C)   capillary action.
D)   atmospheric pressure.
E)   none of these

Question 9

What is the approximate mass of a 1-square-centimeter column of air that extends from sea level to the top of the atmosphere?

Accepted Answer

A)   100 kilograms
B)   1 kilogram
C)   1 gram
D)   10 kilograms

Question 10

A liter-sized block of ordinary wood floats in water. The amount of water displaced is

Accepted Answer

A)   1 liter.
B)   less than 1 liter.
C)   more than 1 liter.
D)   depends on the water density
E)   none of these

Question 11

As a high-altitude balloon sinks lower and lower into the atmosphere, it undergoes a decrease in

Accepted Answer

A)   density.
B)   volume.
C)   mass.
D)   weight.
E)   none of these

Question 12

When gas in a container is squeezed to half its volume and the temperature remains the same, the gas pressure

Accepted Answer

A)   doubles.
B)   remains the same.
C)   quadruples.
D)   halves.

Question 13

The pressure at the bottom of a jug filled with water does NOT depend on

Accepted Answer

A)   the acceleration due to gravity.
B)   surface area of the water.
C)   the height of the liquid.
D)   water density.
E)   none of these

Question 14

Airplane flight best illustrates

Accepted Answer

A)   Bernoulli's principle.
B)   Boyle's law.
C)   Pascal's principle.
D)   Archimedes' principle.

Question 15

A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of
The bucket

Accepted Answer

A)   falls.
B)   rises.
C)   remains the same.

Question 16

Water pressure is greatest against the

Accepted Answer

A)   sides of a submerged object.
B)   top of a submerged object.
C)   bottom of a submerged object.
D)   is the same against all surfaces
E)   none of these

Question 17

As a woman holding her breath swims deeper and deeper beneath the water's surface, her density

Accepted Answer

A)   remains the same.
B)   decreases.
C)   increases.

Question 18

Buoyant force is greatest on a submerged

Accepted Answer

A)   1-kg block of lead.
B)   1-kg block of aluminum.
C)   is the same on each

Question 19

The reason that buoyant force acts upward on a submerged object is that

Accepted Answer

A)   if it acted downward, nothing would float.
B)   the weight of fluid displaced reacts with an upward force.
C)   upward pressure against the bottom is greater than downward pressure against the top of the submerged object.
D)   it acts in a direction to oppose gravity.

Question 20

Gas pressure inside an inflated stretched balloon is actually

Accepted Answer

A)   greater than air pressure outside the balloon.
B)   less than air pressure outside the balloon.
C)   equal to air pressure outside the balloon.
D)   impossible to determine without knowing the type of gas.

Exam 7: Fluid Mechanics

A bubble of air released from the bottom of a lake

Correct AnswerverifiedShow Answer

A block of styrofoam floats on water while a same size block of lead lies submerged in the water. The buoyant force is greatest on the

Correct AnswerverifiedShow Answer

A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of The bucket

Correct AnswerverifiedShow Answer

The Bernoulli effect causes passing ships to be drawn together when the ships are close and moving in

Correct AnswerverifiedShow Answer

The pressure at the bottom of a jug filled with water does NOT depend on

Correct AnswerverifiedShow Answer

The faster a fluid moves, the

Correct AnswerverifiedShow Answer

Airplane flight best illustrates

Correct AnswerverifiedShow Answer

The reason that buoyant force acts upward on a submerged object is that

Correct AnswerverifiedShow Answer

The depth to which an inverted drinking glass must be pushed beneath the surface of water so that the volume of enclosed air is squeezed to half is

Correct AnswerverifiedShow Answer

Gas pressure inside an inflated stretched balloon is actually

Correct AnswerverifiedShow Answer

Buoyant force is greatest on a submerged

Correct AnswerverifiedShow Answer

As a high-altitude balloon sinks lower and lower into the atmosphere, it undergoes a decrease in

Correct AnswerverifiedShow Answer

Wind blowing over the top of a hill

Correct AnswerverifiedShow Answer

A helium-filled balloon released in the atmosphere will rise until

Correct AnswerverifiedShow Answer

As a woman holding her breath swims deeper and deeper beneath the water's surface, her density

Correct AnswerverifiedShow Answer

When gas in a container is squeezed to half its volume and the temperature remains the same, the gas pressure

Correct AnswerverifiedShow Answer

Water pressure is greatest against the

Correct AnswerverifiedShow Answer

What is the approximate mass of a 1-square-centimeter column of air that extends from sea level to the top of the atmosphere?

Correct AnswerverifiedShow Answer

A liter-sized block of ordinary wood floats in water. The amount of water displaced is

Correct AnswerverifiedShow Answer

In drinking soda or water through a straw, we make use of

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified