Question 1

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 2

A key feature of the Falkirk Wheel in Scotland is that opposite caissons have the same weight when both are brim-full of water

Accepted Answer

A) and boats in each have about equal weights. 
B) and at least one boat is in each caisson. 
C) regardless of the weights of boats or no boats in each. 
D) none of the above 
A) and boats in each have about equal weights. 
B) and at least one boat is in each caisson. 
C) regardless of the weights of boats or no boats in each. 
D) none of the above

Question 3

When an object is partly or wholly immersed in a liquid,it is buoyed up

Accepted Answer

A) by a force equal to its own weight. 
B) by a force equal to the weight of liquid displaced. 
C) and floats because of Archimedes' principle. 
D) but sinks. 
E) none of the above 
A) by a force equal to its own weight. 
B) by a force equal to the weight of liquid displaced. 
C) and floats because of Archimedes' principle. 
D) but sinks. 
E) none of the above

Question 4

Fill a U-tube with water and the level in both ends is the same.Water seeks its own level.Why?

Accepted Answer

The water in one side of the filled U-tu

Question 5

The pair of water-filled caissons of the Falkirk Wheel have equal weights whenever

Accepted Answer

A) they carry equal-weight floating boats. 
B) one carries a heavy floating boat and the other only water. 
C) they carry unequal weights of floating boats. 
D) all of the above 
E) none of the above 
A) they carry equal-weight floating boats. 
B) one carries a heavy floating boat and the other only water. 
C) they carry unequal weights of floating boats. 
D) all of the above 
E) none of the above

Question 6

The internal pressure of a fluid that gains speed

Accepted Answer

A) increases. 
B) remains unchanged. 
C) decreases. 
A) increases. 
B) remains unchanged. 
C) decreases.

Question 7

If the volume of an object doubles with no change in mass,its density would be

Accepted Answer

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

Question 8

A large block of wood and a small block of iron each register 2000 N on a weighing scale.Taking buoyancy of air into account,which has the greater mass?

Accepted Answer

A) wood 
B) iron 
C) both the same 
A) wood 
B) iron 
C) both the same

Question 9

An object in a vacuum has no

Accepted Answer

A) buoyant force. 
B) mass. 
C) weight. 
D) temperature. 
E) all of the above 
A) buoyant force. 
B) mass. 
C) weight. 
D) temperature. 
E) all of the above

Question 10

The block that displaces the greatest volume of water when submerged is a

Accepted Answer

A) 1-kg block of aluminum. 
B) 1-kg block of iron. 
C) 1-kg block of lead. 
D) all the same 
A) 1-kg block of aluminum. 
B) 1-kg block of iron. 
C) 1-kg block of lead. 
D) all the same

Question 11

What is the approximate density of a fish,compared with the density of water? Defend your answer.

Accepted Answer

The density of a fish is the same as the

Question 12

The buoyant force acting on a 1-ton blimp hovering in air is

Accepted Answer

A) zero. 
B) 1 ton. 
C) less than 1 ton. 
D) greater than 1 ton. 
A) zero. 
B) 1 ton. 
C) less than 1 ton. 
D) greater than 1 ton.

Question 13

An umbrella tends to jerk upward on a windy day principally because

Accepted Answer

A) air gets trapped under the umbrella,which warms,and rises. 
B) buoyancy increases with increasing wind speed. 
C) air pressure is reduced over the curved top surface. 
D) all of the above 
A) air gets trapped under the umbrella,which warms,and rises. 
B) buoyancy increases with increasing wind speed. 
C) air pressure is reduced over the curved top surface. 
D) all of the above

Question 14

Airplane lift is achieved when air pressure on the bottom of its wings is

Accepted Answer

A) greater than pressure on top. 
B) less than pressure on top. 
C) the same as pressure on top. 
A) greater than pressure on top. 
B) less than pressure on top. 
C) the same as pressure on top.

Question 15

Compared to the buoyant force on you when floating in fresh water,buoyant force on you when floating in the dense water of the Dead Sea is

Accepted Answer

A) less because volume displacement is less. 
B) more because of the greater density of fluid displaced. 
C) the same. 
A) less because volume displacement is less. 
B) more because of the greater density of fluid displaced. 
C) the same.

Question 16

If you lie on a bed of nails your back will encounter pressure due to contact with the nails.Nail pressure on your back will be less if the bed has

Accepted Answer

A) fewer nails. 
B) more nails. 
C) both of the above 
D) none of the above 
A) fewer nails. 
B) more nails. 
C) both of the above 
D) none of the above

Question 17

Life jackets help you float because

Accepted Answer

A) the jacket causes you to weigh less. 
B) the jacket has the same density as an average human. 
C) the jacket repels water. 
D) if you sink,the jacket sinks. 
E) the combined density of you and the jacket is less than your density alone. 
A) the jacket causes you to weigh less. 
B) the jacket has the same density as an average human. 
C) the jacket repels water. 
D) if you sink,the jacket sinks. 
E) the combined density of you and the jacket is less than your density alone.

Question 18

When a suction cup sticks to a wall it is

Accepted Answer

A) pulled to the wall by the vacuum. 
B) pushed to the wall by the atmosphere. 
C) both of these 
D) none of the above 
A) pulled to the wall by the vacuum. 
B) pushed to the wall by the atmosphere. 
C) both of these 
D) none of the above

Question 19

We know that any body more dense than water will sink in water.Why?

Accepted Answer

If a body is more dense than water,it wi

Question 20

A marshmallow in a vacuum becomes

Accepted Answer

A) larger. 
B) smaller. 
C) does not change. 
A) larger. 
B) smaller. 
C) does not change.

Exam 5: Fluid Mechanics

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

A key feature of the Falkirk Wheel in Scotland is that opposite caissons have the same weight when both are brim-full of water

When an object is partly or wholly immersed in a liquid,it is buoyed up

Fill a U-tube with water and the level in both ends is the same.Water seeks its own level.Why?

The pair of water-filled caissons of the Falkirk Wheel have equal weights whenever

The internal pressure of a fluid that gains speed

If the volume of an object doubles with no change in mass,its density would be

A large block of wood and a small block of iron each register 2000 N on a weighing scale.Taking buoyancy of air into account,which has the greater mass?

An object in a vacuum has no

The block that displaces the greatest volume of water when submerged is a

What is the approximate density of a fish,compared with the density of water? Defend your answer.

The buoyant force acting on a 1-ton blimp hovering in air is

An umbrella tends to jerk upward on a windy day principally because

Airplane lift is achieved when air pressure on the bottom of its wings is

Compared to the buoyant force on you when floating in fresh water,buoyant force on you when floating in the dense water of the Dead Sea is

If you lie on a bed of nails your back will encounter pressure due to contact with the nails.Nail pressure on your back will be less if the bed has

Life jackets help you float because

When a suction cup sticks to a wall it is

We know that any body more dense than water will sink in water.Why?

A marshmallow in a vacuum becomes

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 Time - Reading 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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