Question 1

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) neither of these 
A) pulled to the wall by the vacuum. 
B) pushed to the wall by the atmosphere. 
C) both of these 
D) neither of these

Question 2

Which of the following bodies is comprised mostly of plasma?

Accepted Answer

A) Earth 
B) Moon 
C) Sun 
D) all of these 
E) none of these 
A) Earth 
B) Moon 
C) Sun 
D) all of these 
E) none of these

Question 3

If a strong wind from the west breaks a window in the north wall of a house,most of the glass will fall

Accepted Answer

A) upward. 
B) inside the house. 
C) outside the house. 
A) upward. 
B) inside the house. 
C) outside the house.

Question 4

The faster a fluid moves,the

Accepted Answer

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

Question 5

The flight of a blimp best illustrates

Accepted Answer

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

Question 6

A balloon is buoyed up with a force equal to the

Accepted Answer

A) weight of air it displaces. 
B) density of surrounding air. 
C) atmospheric pressure. 
D) weight of the balloon and contents. 
E) all of these 
A) weight of air it displaces. 
B) density of surrounding air. 
C) atmospheric pressure. 
D) weight of the balloon and contents. 
E) all of these

Question 7

Compared to the buoyant force of the atmosphere on a 1-liter helium-filled balloon,the buoyant force of the atmosphere on a nearby 1-liter 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

An umbrella tends to move upwards on a windy day principally because

Accepted Answer

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

Question 9

Compared to the buoyant force of the atmosphere on a 1-kilogram helium-filled balloon,the buoyant force of the atmosphere on a nearby 1-kilogram 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 10

Two vertical tubes of equal cross-sectional areas are filled with water and mercury.If water is filled to a depth of 10.3 m and mercury to a depth of 0.76 m,both liquids have equal

Accepted Answer

A) volumes. 
B) densities. 
C) weights. 
D) viscosity. 
E) none of these 
A) volumes. 
B) densities. 
C) weights. 
D) viscosity. 
E) none of these

Question 11

A common 5-liter metal can will float in air if it is

Accepted Answer

A) evacuated of air. 
B) filled with a very large amount of helium. 
C) thrown high enough. 
D) A can will not float in air unless the displaced air weighs more than the can and its contents. 
A) evacuated of air. 
B) filled with a very large amount of helium. 
C) thrown high enough. 
D) A can will not float in air unless the displaced air weighs more than the can and its contents.

Question 12

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

Question 13

Most of the mass of material that makes up a plasma is

Accepted Answer

A) electrically neutral. 
B) always positively charged. 
C) always negatively charged. 
A) electrically neutral. 
B) always positively charged. 
C) always negatively charged.

Question 14

When a gas is heated and becomes a plasma,its electric charge is usually

Accepted Answer

A) balanced. 
B) negative. 
C) positive. 
D) non-existent. 
E) none of these 
A) balanced. 
B) negative. 
C) positive. 
D) non-existent. 
E) none of these

Question 15

Alcohol is less dense than water.If alcohol is used to make a barometer on a day when atmospheric pressure is normal,the height of the alcohol column would be

Accepted Answer

A) less than 10.3 m. 
B) more than 10.3 m. 
C) 10.3 m. 
A) less than 10.3 m. 
B) more than 10.3 m. 
C) 10.3 m.

Question 16

As a balloon rises higher and higher into the atmosphere,its

Accepted Answer

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

Question 17

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

Question 18

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

Accepted Answer

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

Question 19

Estimate the mass of air inside an average automobile.

Accepted Answer

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

Question 20

About how high can water be theoretically lifted by a vacuum pump at sea level?

Accepted Answer

A) less than 10.3 m 
B) more than 10.3 m 
C) 10.3 m 
A) less than 10.3 m 
B) more than 10.3 m 
C) 10.3 m

Exam 14: Gases and Plasmas

A suction cup sticks to a wall.It is

Which of the following bodies is comprised mostly of plasma?

If a strong wind from the west breaks a window in the north wall of a house,most of the glass will fall

The faster a fluid moves,the

The flight of a blimp best illustrates

A balloon is buoyed up with a force equal to the

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

An umbrella tends to move upwards on a windy day principally because

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

Two vertical tubes of equal cross-sectional areas are filled with water and mercury.If water is filled to a depth of 10.3 m and mercury to a depth of 0.76 m,both liquids have equal

A common 5-liter metal can will float in air if it is

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

Most of the mass of material that makes up a plasma is

When a gas is heated and becomes a plasma,its electric charge is usually

Alcohol is less dense than water.If alcohol is used to make a barometer on a day when atmospheric pressure is normal,the height of the alcohol column would be

As a balloon rises higher and higher into the atmosphere,its

Wind blowing over the top of a hill

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

Estimate the mass of air inside an average automobile.

About how high can water be theoretically lifted by a vacuum pump at sea level?

About Science

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