Question 1

A one-ton blimp hovers in the air.The buoyant force acting on it is

Accepted Answer

A) zero. 
B) one ton. 
C) less than one ton. 
D) more than one ton. 
A) zero. 
B) one ton. 
C) less than one ton. 
D) more than one ton.

Question 2

The weight of a 1-square-meter column of air that extends from sea level to the top of the atmosphere is

Accepted Answer

A) 101 N. 
B) 10,100 N. 
C) 101,000 N. 
D) 101,000,000 N. 
A) 101 N. 
B) 10,100 N. 
C) 101,000 N. 
D) 101,000,000 N.

Question 3

Use the following figure to answer the question:  
-It would be easier to pull evacuated Magdeburg hemispheres apart when they are

Accepted Answer

A) held upside down. 
B) at sea level. 
C) 20 km beneath the ocean surface. 
D) 20 km above the ocean surface. 
E) none of these 
A) held upside down. 
B) at sea level. 
C) 20 km beneath the ocean surface. 
D) 20 km above the ocean surface. 
E) none of these

Question 4

A large block of wood and a smaller block of iron on weighing scales both register the same weight - 1 ton.Taking buoyancy of air into account,which has the greater mass?

Accepted Answer

A) wood 
B) iron 
C) Both have the same mass. 
D) More information is needed. 
A) wood 
B) iron 
C) Both have the same mass. 
D) More information is needed.

Question 5

In a vacuum,an object has no

Accepted Answer

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

Question 6

A bubble of air released from the bottom of a lake

Accepted Answer

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

Question 7

Glowing plasma is evident in the light from

Accepted Answer

A) a fluorescent lamp. 
B) the aurora borealis (northern lights). 
C) an incandescent lamp. 
D) Choices A and B are both correct. 
E) Choices A and C are both correct. 
A) a fluorescent lamp. 
B) the aurora borealis (northern lights). 
C) an incandescent lamp. 
D) Choices A and B are both correct. 
E) Choices A and C are both correct.

Question 8

Suppose you are standing on a weighing scale and all of a sudden the atmosphere vanished.The reading on the scale would

Accepted Answer

A) increase. 
B) decrease. 
C) remain the same. 
D) quickly reduce to zero. 
A) increase. 
B) decrease. 
C) remain the same. 
D) quickly reduce to zero.

Question 9

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 10

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

Question 11

Atmospheric molecules do not fly off into outer space because of

Accepted Answer

A) their relatively high speeds. 
B) their relatively low densities. 
C) Earth gravitation. 
D) cohesive forces. 
A) their relatively high speeds. 
B) their relatively low densities. 
C) Earth gravitation. 
D) cohesive forces.

Question 12

About what percentage of the molecules that make up the atmosphere are below an aircraft that flies at an altitude of 6 kilometers?

Accepted Answer

A) 20% 
B) 30% 
C) 40% 
D) 50% 
E) more than 50% 
A) 20% 
B) 30% 
C) 40% 
D) 50% 
E) more than 50%

Question 13

The main difference between gases and plasmas has to do with

Accepted Answer

A) the kinds of elements involved. 
B) interatomic spacing. 
C) electrical conduction. 
D) fluid pressure. 
E) the proportion of matter to antimatter in the universe. 
A) the kinds of elements involved. 
B) interatomic spacing. 
C) electrical conduction. 
D) fluid pressure. 
E) the proportion of matter to antimatter in the universe.

Question 14

A plasma differs from a gas in that

Accepted Answer

A) its molecules are farther apart. 
B) it is hotter than a gas. 
C) it is electrically conducting. 
D) its atoms are boosted to higher atomic numbers. 
E) all of these 
A) its molecules are farther apart. 
B) it is hotter than a gas. 
C) it is electrically conducting. 
D) its atoms are boosted to higher atomic numbers. 
E) all of these

Question 15

The weight of air in a bathtub (about 1/3 cubic meter)is about the same as the weight of

Accepted Answer

A) a pea. 
B) an egg. 
C) a small apple. 
D) a pound of butter. 
E) a 10-pound sack of potatoes. 
A) a pea. 
B) an egg. 
C) a small apple. 
D) a pound of butter. 
E) a 10-pound sack of potatoes.

Question 16

A car with closed windows makes a left hand turn.A helium-filled balloon in the car will

Accepted Answer

A) move to the right. 
B) move to the left. 
C) move to the front. 
D) move to the back. 
E) not move. 
A) move to the right. 
B) move to the left. 
C) move to the front. 
D) move to the back. 
E) not move.

Question 17

A column that extends from sea level to the top of the atmosphere contains a certain mass of air.If the same column instead had the same mass of water in it,the height of the water column would be

Accepted Answer

A) 1/13.6 times the height of the atmosphere. 
B) about 3/4 meter. 
C) 10.3 meters. 
D) about 5.6 kilometers. 
A) 1/13.6 times the height of the atmosphere. 
B) about 3/4 meter. 
C) 10.3 meters. 
D) about 5.6 kilometers.

Question 18

Plasmas are a central part of power generation in

Accepted Answer

A) MHD generators. 
B) turbo generators. 
C) both 
D) neither 
A) MHD generators. 
B) turbo generators. 
C) both 
D) neither

Question 19

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

Accepted Answer

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

Question 20

An empty jar is pushed open-side downward into water so that air trapped in it cannot get out.As it is pushed deeper,the buoyant force on the jar

Accepted Answer

A) increases. 
B) decreases. 
C) increases,then decreases. 
D) decreases,then increases. 
E) remains the same. 
A) increases. 
B) decreases. 
C) increases,then decreases. 
D) decreases,then increases. 
E) remains the same.

Exam 14: Gases and Plasmas

A one-ton blimp hovers in the air.The buoyant force acting on it is

The weight of a 1-square-meter column of air that extends from sea level to the top of the atmosphere is

Use the following figure to answer the question: -It would be easier to pull evacuated Magdeburg hemispheres apart when they are

A large block of wood and a smaller block of iron on weighing scales both register the same weight - 1 ton.Taking buoyancy of air into account,which has the greater mass?

In a vacuum,an object has no

A bubble of air released from the bottom of a lake

Glowing plasma is evident in the light from

Suppose you are standing on a weighing scale and all of a sudden the atmosphere vanished.The reading on the scale would

Atmospheric pressure is caused by the

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

Atmospheric molecules do not fly off into outer space because of

About what percentage of the molecules that make up the atmosphere are below an aircraft that flies at an altitude of 6 kilometers?

The main difference between gases and plasmas has to do with

A plasma differs from a gas in that

The weight of air in a bathtub (about 1/3 cubic meter)is about the same as the weight of

A car with closed windows makes a left hand turn.A helium-filled balloon in the car will

A column that extends from sea level to the top of the atmosphere contains a certain mass of air.If the same column instead had the same mass of water in it,the height of the water column would be

Plasmas are a central part of power generation in

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

An empty jar is pushed open-side downward into water so that air trapped in it cannot get out.As it is pushed deeper,the buoyant force on the jar

About Science

Newtons First Law of Motion: Inertia

Linear Motion

Newtons Second Law of Motion: Force and Acceleration

Newtons Third Law of Motion: Action and Reaction

Momentum

Energy

Rotational Motion

Gravity

Projectile and Satellite Motion

Atomic Nature of Matter

Solids

Liquids

Temperature,heat,and Expansion

Heat Transfer

Change of Phase

Thermodynamics

Vibrations and Waves

Sound

Musical Sounds

Electrostatics

Electric Current

Magnetism

Electromagnetic Induction

Properties of Light

Color

Reflection and Refraction

Light Waves

Light Emission

Light Quanta

The Atom and the Quantum

Atomic Nucleus and Radioactivity

Nuclear Fission and Fusion

Special Theory of Relativity

General Theory of Relativity

Filters