Question 1

When you blow air between a pair of closely-spaced Ping-Pong balls suspended by strings, the balls will swing

Accepted Answer

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

Question 2

Consider two mercury barometers, one with twice the cross-sectional area of the other. Neglecting capillarity, compared with the wider tube, mercury in the smaller tube will rise

Accepted Answer

A) to the same height. 
B) twice as high. 
C) four times as high. 
D) more than four times as high. 
E) none of the above 
A) to the same height. 
B) twice as high. 
C) four times as high. 
D) more than four times as high. 
E) none of the above

Question 3

Atmospheric pressure is caused by the

Accepted Answer

A) density of the atmosphere. 
B) weight of the atmosphere. 
C) temperature of the atmosphere. 
D) solar energy on the atmosphere. 
A) density of the atmosphere. 
B) weight of the atmosphere. 
C) temperature of the atmosphere. 
D) solar energy on the atmosphere.

Question 4

When water is turned on in a shower, the shower curtain moves towards the water spray. This partly involves

Accepted Answer

A) capillary action. 
B) surface tension. 
C) pressure changes in moving fluids. 
D) none of the above 
A) capillary action. 
B) surface tension. 
C) pressure changes in moving fluids. 
D) none of the above

Question 5

The depth to which an inverted drinking glass must be pushed beneath the water surface to squeeze the enclosed air to half its volume is

Accepted Answer

A) 76 cm. 
B) 10.3 m. 
C) 14.7 m. 
D) 20.6 m. 
E) 29.4 m. 
A) 76 cm. 
B) 10.3 m. 
C) 14.7 m. 
D) 20.6 m. 
E) 29.4 m.

Question 6

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 the above 
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 the above

Question 7

A swimmer cannot snorkel more than a meter deep because air

Accepted Answer

A) in the lungs cannot easily be expelled. 
B) tends to liquefy in the snorkel tube. 
C) is buoyed up leaving the swimmer breathless. 
D) at the surface will not freely enter the higher-pressure region in the compressed lungs. 
E) all of the above 
A) in the lungs cannot easily be expelled. 
B) tends to liquefy in the snorkel tube. 
C) is buoyed up leaving the swimmer breathless. 
D) at the surface will not freely enter the higher-pressure region in the compressed lungs. 
E) all of the above

Question 8

Most of the matter in our galaxy is in the

Accepted Answer

A) solid phase. 
B) liquid phase. 
C) gaseous phase. 
D) plasma phase. 
E) none of the above 
A) solid phase. 
B) liquid phase. 
C) gaseous phase. 
D) plasma phase. 
E) none of the above

Question 9

A buoyant force acts on

Accepted Answer

A) gas-filled balloons. 
B) you and your classmates. 
C) both of these 
D) neither of these 
A) gas-filled balloons. 
B) you and your classmates. 
C) both of these 
D) neither of these

Question 10

A helium-filled balloon released in the atmosphere will rise until

Accepted Answer

A) the pressure inside the balloon equals atmospheric pressure. 
B) atmospheric pressure on the bottom and top of the balloon are equal. 
C) the balloon and surrounding air have equal densities. 
D) all of the above 
E) none of the above 
A) the pressure inside the balloon equals atmospheric pressure. 
B) atmospheric pressure on the bottom and top of the balloon are equal. 
C) the balloon and surrounding air have equal densities. 
D) all of the above 
E) none of the above

Question 11

The buoyant force of the atmosphere on a body is equal to the

Accepted Answer

A) weight of air displaced. 
B) volume of air displaced. 
C) mass of the air displaced. 
D) all of the above 
E) none of the above 
A) weight of air displaced. 
B) volume of air displaced. 
C) mass of the air displaced. 
D) all of the above 
E) none of the above

Question 12

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

Accepted Answer

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

Question 13

When a gas in a container is squeezed to half its volume, its density

Accepted Answer

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

Question 14

The air in your classroom 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

Question 15

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

Accepted Answer

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

Question 16

The principle of continuity states that for fluid flow to be continuous it must

Accepted Answer

A) speed up in narrow regions of flow. 
B) slow down in wide regions of flow. 
C) both of these 
D) neither of these 
A) speed up in narrow regions of flow. 
B) slow down in wide regions of flow. 
C) both of these 
D) neither of these

Question 17

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

Accepted Answer

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

Question 18

A spinning tossed baseball veers off course in the direction of

Accepted Answer

A) reduced air pressure on the ball. 
B) increased air pressure on the ball. 
C) non-crowded streamlines. 
A) reduced air pressure on the ball. 
B) increased air pressure on the ball. 
C) non-crowded streamlines.

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

Question 20

When boarding an airplane you bring a bag of chips. While in flight the bag puffs up, because

Accepted Answer

A) air pressure in the air-tight bag is greater than cabin air pressure. 
B) suction is occurring. 
C) air pressure is affected by the Bernoulli principle. 
D) all the above 
E) none of the above 
A) air pressure in the air-tight bag is greater than cabin air pressure. 
B) suction is occurring. 
C) air pressure is affected by the Bernoulli principle. 
D) all the above 
E) none of the above

Exam 14: Gases and Plasmas

When you blow air between a pair of closely-spaced Ping-Pong balls suspended by strings, the balls will swing

Consider two mercury barometers, one with twice the cross-sectional area of the other. Neglecting capillarity, compared with the wider tube, mercury in the smaller tube will rise

Atmospheric pressure is caused by the

When water is turned on in a shower, the shower curtain moves towards the water spray. This partly involves

The depth to which an inverted drinking glass must be pushed beneath the water surface to squeeze the enclosed air to half its volume is

A plasma differs from a gas in that

A swimmer cannot snorkel more than a meter deep because air

Most of the matter in our galaxy is in the

A buoyant force acts on

A helium-filled balloon released in the atmosphere will rise until

The buoyant force of the atmosphere on a body is equal to the

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

When a gas in a container is squeezed to half its volume, its density

The air in your classroom has

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

The principle of continuity states that for fluid flow to be continuous it must

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

A spinning tossed baseball veers off course in the direction of

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

When boarding an airplane you bring a bag of chips. While in flight the bag puffs up, because

About Science

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