Question 1

Assuming no change in temperature,as a freely expanding helium-filled balloon rises in the atmosphere,the buoyant force that acts on it

Accepted Answer

A)  increases.
B)  decreases.
C)  remains nearly the same for a long way. C

Question 2

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

Accepted Answer

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

Question 3

In a vacuum a marshmallow becomes

Accepted Answer

A)  larger.
B)  smaller.
C)  flat.
D)  a hollow shell.
E)  none of the above choices

Question 4

What is the approximate mass of a 1-square-centimeter column of air that extends from sea level to the top of the atmosphere?

Accepted Answer

A)  1 gram
B)  1 kilogram
C)  10 kilograms
D)  100 kilograms

Question 5

When water is turned on in a shower,the shower curtain moves towards the water.This has to do with

Accepted Answer

A)  capillary action.
B)  surface tension.
C)  heat capacity.
D)  pressure of a moving fluid.
E)  none of these

Question 6

As a woman holding her breath swims deeper and deeper beneath the water's surface,her density

Accepted Answer

A)  increases.
B)  decreases.
C)  remains the same.

Question 7

As a helium-filled balloon rises in the air,it becomes

Accepted Answer

A)  bigger.
B)  more dense.
C)  heavier.
D)  all of these
E)  none of these

Question 8

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

Accepted Answer

A)  the same height as in the larger tube.
B)  twice as high as mercury in the larger tube.
C)  four times as high as mercury in the larger tube.
D)  more than four times as high as in the larger tube.
E)  none of these

Question 9

Use the following figure to answer the question: 
-The depth to which an inverted drinking glass must be pushed beneath the surface of water so that the volume of enclosed air is squeezed to half is

Accepted Answer

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

Question 10

Most of the matter in the universe is in the

Accepted Answer

A)  solid state.
B)  liquid state.
C)  gaseous state.
D)  plasma state.
E)  none of these

Question 11

Gas pressure inside an inflated stretched balloon is actually

Accepted Answer

A)  less than air pressure outside the balloon.
B)  equal to air pressure outside the balloon.
C)  greater than air pressure outside the balloon.
D)  impossible to determine without knowing the type of gas. C

Question 12

The energy source responsible for the motion of molecules that make up the atmosphere is

Accepted Answer

A)  their own natural kinetic energy.
B)  the pressure caused by the weight of air.
C)  atmospheric tides.
D)  solar power.

Question 13

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 mercury in it,the height of the mercury 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.

Question 14

The air in this room has

Accepted Answer

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

Question 15

The Bernoulli effect causes passing ships to be drawn together when the ships are close and moving in

Accepted Answer

A)  the same direction.
B)  opposite directions.
C)  either the same or opposite directions.

Question 16

Compared to all liquids,solids,and gases in the universe,plasmas are the most

Accepted Answer

A)  abundant.
B)  rare.
C)  We don't have enough information at this time.

Question 17

When a common fluorescent lamp is on,the mercury vapor inside is actually in a

Accepted Answer

A)  gaseous state.
B)  liquid state.
C)  plasma state.
D)  solid state.
E)  none of these

Question 18

Airplane flight best illustrates

Accepted Answer

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

Question 19

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 of the balloon equals atmospheric pressure on the top of the balloon.
C)  the balloon and surrounding air have equal densities.
D)  all of these
E)  none of these

Question 20

If you release a ball inside a freely falling elevator,it stays in front of you instead of "falling to the floor" because you,the ball,the elevator,and the air in the elevator are all in free fall.If you similarly release a helium-filled balloon,the balloon will

Accepted Answer

A)  also stay in front of you.
B)  press against the ceiling.
C)  press against the floor.
D)  slowly rise.
E)  slowly fall. A

Exam 14: Gases and Plasmas

Assuming no change in temperature,as a freely expanding helium-filled balloon rises in the atmosphere,the buoyant force that acts on it

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

In a vacuum a marshmallow becomes

Correct AnswerverifiedShow Answer

What is the approximate mass of a 1-square-centimeter column of air that extends from sea level to the top of the atmosphere?

Correct AnswerverifiedShow Answer

When water is turned on in a shower,the shower curtain moves towards the water.This has to do with

Correct AnswerverifiedShow Answer

As a woman holding her breath swims deeper and deeper beneath the water's surface,her density

Correct AnswerverifiedShow Answer

As a helium-filled balloon rises in the air,it becomes

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Use the following figure to answer the question: -The depth to which an inverted drinking glass must be pushed beneath the surface of water so that the volume of enclosed air is squeezed to half is

Correct AnswerverifiedShow Answer

Most of the matter in the universe is in the

Correct AnswerverifiedShow Answer

Gas pressure inside an inflated stretched balloon is actually

Correct AnswerverifiedC

The energy source responsible for the motion of molecules that make up the atmosphere is

Correct AnswerverifiedShow Answer

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 mercury in it,the height of the mercury column would be

Correct AnswerverifiedShow Answer

The air in this room has

Correct AnswerverifiedShow Answer

The Bernoulli effect causes passing ships to be drawn together when the ships are close and moving in

Correct AnswerverifiedShow Answer

Compared to all liquids,solids,and gases in the universe,plasmas are the most

Correct AnswerverifiedShow Answer

When a common fluorescent lamp is on,the mercury vapor inside is actually in a

Correct AnswerverifiedShow Answer

Airplane flight best illustrates

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If you release a ball inside a freely falling elevator,it stays in front of you instead of "falling to the floor" because you,the ball,the elevator,and the air in the elevator are all in free fall.If you similarly release a helium-filled balloon,the balloon will

Correct AnswerverifiedA

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C

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C

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A