Question 1

When a boat sails from fresh water to salt water, the boat will float

Accepted Answer

A) lower in the water. 
B) higher in the water. 
C) at the same water level. 
A) lower in the water. 
B) higher in the water. 
C) at the same water level.

Question 2

An important underlying feature of hydraulic devices is the conservation of

Accepted Answer

A) pressure. 
B) momentum. 
C) energy. 
D) all of the above 
E) none of the above 
A) pressure. 
B) momentum. 
C) energy. 
D) all of the above 
E) none of the above

Question 3

Which is greater, the buoyant force that acts on an elephant, or on a helium-filled party balloon? Explain then, why the balloon rises in air and the elephant doesn't.

Accepted Answer

The buoyant force exerted by the atmosph

Question 4

Atmospheric pressure is caused by the

Accepted Answer

A) density of the atmosphere. 
B) weight of the atmosphere. 
C) temperature of the atmosphere. 
D) effect of the Sun's energy on the atmosphere. 
A) density of the atmosphere. 
B) weight of the atmosphere. 
C) temperature of the atmosphere. 
D) effect of the Sun's energy on the atmosphere.

Question 5

Lobsters live on the bottom of the ocean. Compared with the density of seawater, the density of a lobster is

Accepted Answer

A) greater. 
B) the same. 
C) less. 
A) greater. 
B) the same. 
C) less.

Question 6

Buoyant force is greatest on a submerged 1 cubic centimeter block of

Accepted Answer

A) lead. 
B) aluminum. 
C) same on each 
A) lead. 
B) aluminum. 
C) same on each

Question 7

Compared with the buoyant force of the atmosphere on a 1-kg helium-filled balloon, the buoyant force of the atmosphere on a nearby 1-kg solid iron block is

Accepted Answer

A) considerably less. 
B) considerably more. 
C) the same. 
A) considerably less. 
B) considerably more. 
C) the same.

Question 8

Strictly speaking, gas pressure inside an inflated stretched balloon is

Accepted Answer

A) less than air pressure outside the balloon. 
B) equal to air pressure outside the balloon. 
C) slightly greater than air pressure outside the balloon. 
A) less than air pressure outside the balloon. 
B) equal to air pressure outside the balloon. 
C) slightly greater than air pressure outside the balloon.

Question 9

A fish normally displaces its own

Accepted Answer

A) volume of water. 
B) weight of water. 
C) both 
D) neither 
A) volume of water. 
B) weight of water. 
C) both 
D) neither

Question 10

An empty jar is pushed open side downward into water so that air trapped inside can't escape. As it is pushed deeper, the buoyant force on the jar

Accepted Answer

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

Question 11

If the part of an iceberg that extends above the water were suddenly removed, the

Accepted Answer

A) iceberg would sink. 
B) buoyant force on the iceberg would soon decrease. 
C) density of the iceberg would change. 
D) pressure on the bottom of the iceberg would increase. 
E) none of the above 
A) iceberg would sink. 
B) buoyant force on the iceberg would soon decrease. 
C) density of the iceberg would change. 
D) pressure on the bottom of the iceberg would increase. 
E) none of the above

Question 12

Pumice is a volcanic rock that floats. Compared with the density of water, its density is

Accepted Answer

A) less. 
B) the same. 
C) more. 
A) less. 
B) the same. 
C) more.

Question 13

Buoyant force acts upward on a submerged object because

Accepted Answer

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

Question 14

If the mass of an object were to double with no change in volume, its density would

Accepted Answer

A) be half. 
B) double. 
C) unchanged. 
A) be half. 
B) double. 
C) unchanged.

Question 15

When gas in a container is squeezed to half its volume at constant temperature, the gas pressure

Accepted Answer

A) is half. 
B) doubles. 
C) quadruples. 
D) remains the same. 
A) is half. 
B) doubles. 
C) quadruples. 
D) remains the same.

Question 16

Blood pressure is normally greater in your

Accepted Answer

A) ears. 
B) feet. 
C) same in each. 
A) ears. 
B) feet. 
C) same in each.

Question 17

Why is an umbrella in danger of being turned inside out on a windy day?

Accepted Answer

Because of the umbrella's curvature, air

Question 18

An iron ball is placed in a pie pan that floats in a bucket. The water level is marked at the side of the bucket. Then the iron ball is removed and allowed to sink in the bucket. The water line at the side of the bucket is

Accepted Answer

A) lower. 
B) the same. 
C) higher. 
A) lower. 
B) the same. 
C) higher.

Question 19

Compared with the buoyant force of the atmosphere on a 1-L helium-filled balloon, the buoyant force of the atmosphere on a nearby 1-L solid iron block is

Accepted Answer

A) considerably less. 
B) considerably more. 
C) the same. 
A) considerably less. 
B) considerably more. 
C) the same.

Question 20

When gas in a container expands to twice its volume, its density

Accepted Answer

A) is half. 
B) doubles. 
C) quadruples. 
D) remains the same. 
A) is half. 
B) doubles. 
C) quadruples. 
D) remains the same.

Exam 5: Fluid Mechanics

When a boat sails from fresh water to salt water, the boat will float

An important underlying feature of hydraulic devices is the conservation of

Which is greater, the buoyant force that acts on an elephant, or on a helium-filled party balloon? Explain then, why the balloon rises in air and the elephant doesn't.

Atmospheric pressure is caused by the

Lobsters live on the bottom of the ocean. Compared with the density of seawater, the density of a lobster is

Buoyant force is greatest on a submerged 1 cubic centimeter block of

Compared with the buoyant force of the atmosphere on a 1-kg helium-filled balloon, the buoyant force of the atmosphere on a nearby 1-kg solid iron block is

Strictly speaking, gas pressure inside an inflated stretched balloon is

A fish normally displaces its own

An empty jar is pushed open side downward into water so that air trapped inside can't escape. As it is pushed deeper, the buoyant force on the jar

If the part of an iceberg that extends above the water were suddenly removed, the

Pumice is a volcanic rock that floats. Compared with the density of water, its density is

Buoyant force acts upward on a submerged object because

If the mass of an object were to double with no change in volume, its density would

When gas in a container is squeezed to half its volume at constant temperature, the gas pressure

Blood pressure is normally greater in your

Why is an umbrella in danger of being turned inside out on a windy day?

An iron ball is placed in a pie pan that floats in a bucket. The water level is marked at the side of the bucket. Then the iron ball is removed and allowed to sink in the bucket. The water line at the side of the bucket is

Compared with the buoyant force of the atmosphere on a 1-L helium-filled balloon, the buoyant force of the atmosphere on a nearby 1-L solid iron block is

When gas in a container expands to twice its volume, its density

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Timereading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: the Nature of Science

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