Question 1

An ice cube floating in a glass of water contains many air bubbles. When the ice melts, the water level

Accepted Answer

A) rises. 
B) falls. 
C) remains unchanged. 
A) rises. 
B) falls. 
C) remains unchanged.

Question 2

Two equal-sized buckets are filled to the top with water. One of the buckets has a piece of wood floating in it, making its total weight

Accepted Answer

A) less than the weight of the other bucket. 
B) equal to the weight of the other bucket. 
C) more than the weight of the other bucket. 
A) less than the weight of the other bucket. 
B) equal to the weight of the other bucket. 
C) more than the weight of the other bucket.

Question 3

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 4

The pressure in a liquid depends on liquid

Accepted Answer

A) density. 
B) depth. 
C) both 
D) neither 
A) density. 
B) depth. 
C) both 
D) neither

Question 5

Suspend a pair of Ping-Pong balls from two strings so there is a small space between them. If you blow air between the balls, they will swing

Accepted Answer

A) toward each other. 
B) apart from each other. 
C) away from the airstream, but not necessarily toward or apart from each other. 
A) toward each other. 
B) apart from each other. 
C) away from the airstream, but not necessarily toward or apart from each other.

Question 6

Which has the greater density, a lake full of water or a cupful of lake water?

Accepted Answer

A) the cupful of lake water 
B) the lake 
C) both have the same density 
A) the cupful of lake water 
B) the lake 
C) both have the same density

Question 7

Compared to the density of water, the density of a fish is

Accepted Answer

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

Question 8

The density of air at room temperature is about 1.2 grams/cm3. This is the same as

Accepted Answer

A) 12 kg/m3. 
B) 120 kg/m3. 
C) 1200 kg/m3. 
A) 12 kg/m3. 
B) 120 kg/m3. 
C) 1200 kg/m3.

Question 9

An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, we conclude that

Accepted Answer

A) egg-shell calcium is repelled by sodium chloride. 
B) the density of salt water exceeds the density of the egg. 
C) buoyant force does not always acts upward. 
D) salt sinks to the bottom. 
E) none of the above 
A) egg-shell calcium is repelled by sodium chloride. 
B) the density of salt water exceeds the density of the egg. 
C) buoyant force does not always acts upward. 
D) salt sinks to the bottom. 
E) none of the above

Question 10

When you stand on tiptoes on a bathroom scale, there is an increase in

Accepted Answer

A) weight reading. 
B) pressure on the scale, not registered as weight. 
C) both weight and pressure on the scale. 
D) none of the above 
A) weight reading. 
B) pressure on the scale, not registered as weight. 
C) both weight and pressure on the scale. 
D) none of the above

Question 11

Suppose you stand on a weighing scale and all of a sudden the atmosphere vanishes. The reading on the scale would

Accepted Answer

A) increase. 
B) decrease. 
C) remain the same. 
A) increase. 
B) decrease. 
C) remain the same.

Question 12

A lobster crawls onto a bathroom scale submerged on the ocean bottom. Compared to its weight above the surface, its apparent weight under water is

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

In a vacuum, an object 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 15

If air speed is greater along the top surface of a bird's wings, pressure of the moving air there is

Accepted Answer

A) unaffected. 
B) less. 
C) more. 
D) turbulent. 
A) unaffected. 
B) less. 
C) more. 
D) turbulent.

Question 16

If a loaf of bread is compressed, its

Accepted Answer

A) molecules decrease in size. 
B) density decreases. 
C) density increases. 
D) none of the above 
A) molecules decrease in size. 
B) density decreases. 
C) density increases. 
D) none of the above

Question 17

A boat loaded with a barrel of water floats in a swimming pool. When the barrel of water is poured overboard, the pool level

Accepted Answer

A) rises. 
B) falls. 
C) remains unchanged. 
A) rises. 
B) falls. 
C) remains unchanged.

Question 18

The density of air at room temperature is about 1.2 grams/cm3. Estimate the mass of air inside an average automobile.

Accepted Answer

A) 2 grams 
B) 2 kg 
C) 20 kg 
D) 200 kg 
E) 2000 kg 
A) 2 grams 
B) 2 kg 
C) 20 kg 
D) 200 kg 
E) 2000 kg

Question 19

A boat loaded with wood floats in a swimming pool. When the wood is thrown overboard, the pool level

Accepted Answer

A) rises. 
B) falls. 
C) remains unchanged. 
A) rises. 
B) falls. 
C) remains unchanged.

Question 20

The air in this room has

Accepted Answer

A) mass. 
B) weight. 
C) energy. 
D) all of the above 
E) none of the above 
A) mass. 
B) weight. 
C) energy. 
D) all of the above 
E) none of the above

Exam 5: Fluid Mechanics

An ice cube floating in a glass of water contains many air bubbles. When the ice melts, the water level

Two equal-sized buckets are filled to the top with water. One of the buckets has a piece of wood floating in it, making its total weight

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

The pressure in a liquid depends on liquid

Suspend a pair of Ping-Pong balls from two strings so there is a small space between them. If you blow air between the balls, they will swing

Which has the greater density, a lake full of water or a cupful of lake water?

Compared to the density of water, the density of a fish is

The density of air at room temperature is about 1.2 grams/cm3. This is the same as

An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, we conclude that

When you stand on tiptoes on a bathroom scale, there is an increase in

Suppose you stand on a weighing scale and all of a sudden the atmosphere vanishes. The reading on the scale would

A lobster crawls onto a bathroom scale submerged on the ocean bottom. Compared to its weight above the surface, its apparent weight under water is

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

In a vacuum, an object has no

If air speed is greater along the top surface of a bird's wings, pressure of the moving air there is

If a loaf of bread is compressed, its

A boat loaded with a barrel of water floats in a swimming pool. When the barrel of water is poured overboard, the pool level

The density of air at room temperature is about 1.2 grams/cm3. Estimate the mass of air inside an average automobile.

A boat loaded with wood floats in a swimming pool. When the wood is thrown overboard, the pool level

The air in this room has

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

Filters

The density of air at room temperature is about 1.2 grams/cm³. This is the same as

The density of air at room temperature is about 1.2 grams/cm³. Estimate the mass of air inside an average automobile.