Unit Test — Unit test Answers

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1
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If a pitch from a moving vehicle sounds lower to a hearer, where is the vehicle in relation to the hearer?

A
past the hearer
B
before the hearer
C
above the level of the hearer’s ear
D
below the level of the hearer’s ear
2
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Which process would correctly calculate the frequency of a wave?

A
dividing speed by wavelength
B
dividing frequency by wavelength
C
multiplying frequency by period
D
dividing wavelength by period
4

Which statement best compares the speed of a sound wave moving through a pot of boiling water and the water vapor above the pot?

A
The sound wave would move faster through the water than through the water vapor.
B
The sound wave would move slower through the water than through the water vapor.
C
The sound wave would move the same speed through the water and the water vapor.
D
The sound wave would move through the water and water vapor at the same speed, but decrease in speed at the transition point.
6

Yolanda is studying two waves. The first wave has an amplitude of 2 m, and the second has an amplitude of 3 m.

A
She can use destructive interference to generate a wave with an amplitude of 3.1 m.
B
She can use constructive interference to generate a wave with an amplitude of 1.5 m.
C
She can use destructive interference to generate a wave with an amplitude of 0 m.
D
She can use constructive interference to generate a wave with an amplitude of 3.5 m.
7

Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. Simon says that the clay appears red because it allows red wavelengths to pass through it.Which statement best explains who is correct?

A
Ingrid is correct. The clay appears red because it reflects red wavelengths.
B
Ingrid is correct. The clay appears red because it is a type of matter.
C
Simon is correct. The clay appears red because it allows red wavelengths to pass through it.
D
Simon is correct. The clay appears red because it is a solid.
8

Hamish is studying what happens when he sends a sound wave through different mediums, and he records his data in a table.

Question illustration
A
Wave 1 will move the fastest.
B
Wave 2 will move the slowest.
C
Wave 3 will move the slowest.
D
Wave 4 will move the fastest.
9

The waves created by two speed boats in a lake interact to form larger waves. This is an example of

A
constructive interference.
B
destructive interference.
C
absorption
D
transmission
10

Noe is studying Wave A and Wave B. Wave A is rated at 100 dB, and Wave B is rated at 90 dB. Which statement can be made about the waves?

A
Wave A has fewer decibels than Wave B.
B
Wave A is louder than Wave B.
C
The intensity of both waves is the same.
D
The amplitude of both waves is the same.
11

Which of these most directly affects what happens to white light when it hits an object?

A
the properties of the object
B
the source of the light
C
the speed at which the light travels
D
the distance of the object from the light
14

Tanner is running his finger around the top of a crystal glass with a natural frequency of 1100 hertz. If Tanner can cause the glass to resonate, it could create a high-pitched sound and shatter.

A
vibrate the glass at 550 hertz
B
vibrate the glass at 1100 hertz
C
increase the loudness of the vibration
D
decrease the loudness of the vibration
15

Which statement can be made about the amplitude of any transverse wave?

A
It is the length from the midpoint to the crest.
B
It is half the length from the midpoint to the trough.
C
It is the length of the wavelength.
D
It is half the length of the wavelength.

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