waves

Question 0

Which of the following will sound not travel through

• air in bruner
• water in lake
• the space between the Earth and the Moon

Answer 0

• the space between the Earth and the Moon

Question 1

In a longitudinal wave, in what direction are the vibrations relative to the direction of wave travel?

Answer 1

back and forth in the same direction

Question 2

When a source of sound approaches you, you detect an increase in its..

• speed
• frequency
• wavelength

Answer 2

frequency

Question 3

Which of the following does not belong in the same group?

• water waves
• TV waves
• light waves
• microwaves

Answer 3

water waves

Question 4

If the sky preferentially scattered red light, a sun set would appear..

Answer 4

blue-purple

Question 5

Consider dipping your fingers repeatedly into water and making waves. If you dip your fingers more frequently, the wavelength of waves..

• lengths
• shortens

Answer 5

shortens

Question 6

The Doppler effect can be observed for..

• sound waves only
• light waves only
• either a or b
• neither a or b

Answer 6

either a or b

Question 7

Sound is generally a ____ wave.

Answer 7

longitudinal wave

Question 8

During a single period, the distance a wave travels is..

• 1/2 the wavelength
• the wavelength
• twice the wavelength
• independent of the wavelength

Answer 8

the wavelength

Question 9

The greenish-blue (cyan) color of water is due to the..

• absorption of yellow light
• absorption of blue light
• absorption of red light

Answer 9

red light

Question 10

Some springs are connected to a bar. One is pulled back and allowed to vibrate. Other springs, similar to the first begin to vibrate. This is an example of..

• forced vibrations
• sympathetic resonance

Answer 10

sympathetic resonance

Question 11

If an electron vibrates vertically up and down, what direction will be polarized?

• longitudinal
• transverse, vertical
• transverse, horizontal

Answer 11

transverse, vertical

Question 12

Most color printers only have magenta, yellow, and cyan inks. How can we get blue to print.

• mix magenta and cyan
• mix magenta and yellow
• mix yellow and cyan

Answer 12

mix magenta and cyan

Question 13

The sky is blue because of air molecules in the sky act as tiny..

• scatters of high frequency light
• scatters of low frequency light
• prisms
• incandescent blue-hot sources of light

Answer 13

scatters of high frequency light

Question 14

Bob stimulates a large motion in a flagpole by regularly pushing on it at its natural frequency. This phenomena is..

• flourescence
• forced vibrations
• resonance

Answer 14

resonance

Question 15

On planet W, they have beautiful oceans of liquid stuff. We know that liquid stuff slightly absorbs blue light. What color are the beautiful oceans?

Answer 15

yellowish

Question 16

Polarization is a property of

• transverse waves
• longitudinal waves
• both
• neither

Answer 16

transverse waves

Question 17

Light from a regular light bulb is viewed through two polarizers. The first polarizer has its transmission axis vertical. How should the second polarizer be placed to have zero light transmitted.

• vertical
• horizontal

Answer 17

horizontal

Question 18

Of the following, which has a wavelength about the length of your arm (1 meter)?

• Microwaves
• Ultraviolet light
• TV and FM radio waves

Answer 18

TV and FM radio waves

Question 19

An ampere is a unit of electrical..

• pressure
• resitance
• current
• all of these

Answer 19

current

Question 20

Compared to a single lamp connected to a battery, two lamps connected in parallel to the same battery will carry..

• more current
• less current
• the same current

Answer 20

more current

Question 21

Compared to a single lamp connected to a battery, two identical lamps connected in series to the same battery will carry..

• more current
• less current
• the same current

Answer 21

less current

Question 22

When we say an appliance “uses up” electricity, we really are saying that.

• current disappears
• electric charges are dissipated
• electron kinetic energy is changed into heat

Answer 22

electron kinetic energy is changed into heat

Question 23

When astronomers observe the su, they see light coming from one edge having a higher frequency than from the other edge. This is due to..

Answer 23

the Doppler effect for light

Question 24

A difference between electric forces and gravitational forces is that electrical forces include..

• separation distance
• repulsive interactions
• infinite range

Answer 24

repulsive interactions

Question 25

In an electrically neutral atom the number of protons in the nucleus is equal to the number of..

• electrons that surround the nucleus
• neutrons that surround the nucleus
• both of these

Answer 25

electrons that surround the nucleus