8.PS4.1 Wave Properties

Examine the diagram.

Two-Part Question

Part One: The number of waves that occur every second is called the _______?Part Two: For the wave shown in this diagram, what is the frequency?

• Part One:

  wavelength

  Part Two:

  1 wave/sec

• Part One:

  frequency

  Part Two:

  2 waves/sec

• Part One:

  2 waves/sec

  Part Two: 

  frequency

Tags

NGSS.MS-PS4-1

Use mathematics and computational thinking (compute frequency). If the speed of a wave is 260 m/s, and the wavelength is 20m, what is its frequency? (260/20=?)

• frequency is 240m

• frequency is 13 m/s

• frequency is 13 Hz

Tags

NGSS.MS-PS4-1

You are in your car waiting for the light to turn green at a traffic light. You hear loud music coming from the car in the next lane. The music is loud enough that you can see your rearview mirror shaking. What would happen to your rearview mirror if the amplitude of the sound waves from the other car was increased?

• Your mirror would shake more as more energy is transferred to your surroundings.

• Your mirror would shake at varying rates, faster and then slower. Then it would stop.

• Your mirror would shake less as the sound wave energy dissipates.

Tags

NGSS.MS-PS4-1

If you press down on a piano key, let's say middle C, it generates a sound wave. Now, imagine that you press it down much harder so that it still plays the same tone but more loudly. How would pressing the key down harder change the sound wave produced?

• The sound wave's amplitude would be larger.

• The sound wave's energy would decrease.

• The sound wave's frequency would increase.

Tags

NGSS.MS-PS4-1

 

Use mathematics and computational thinking (compute frequency). If the speed of a wave is 33 m/s, and the wavelength is 17Hz, what is its wavelength? (33/17=m?)

• wavelength is 1.94 Hz

• wavelength is 561 m

• wavelength is 1.94 m.

Tags

NGSS.MS-PS4-1

To play high pitch notes on a guitar, a musician must decrease the length of the strings by pressing down on the strings with his or her fingers as they are being plucked or strummed. Now imagine that a guitar string is cut into four pieces of different lengths as shown below.  Each piece is stretched between two supports to the same tightness. If each piece was plucked in the middle with the exact same amount of force, which of the pieces would have the highest number of wave oscillations during one second?

• A

• B

• C

Tags

NGSS.MS-PS4-1

Use mathematics and computational thinking (compute wave speed). If the frequency of a wave is 12Hz, and the wavelength is 7m, what is its speed? (12x7=Speed)

• wave speed is 1.714 m/s

• wave speed is 84 m/s

• waves speed is 84 Hz

Tags

NGSS.MS-PS4-1

Carefully examine the image below. Select the correct value for the wavelength of this wave, rounded to the nearest tenth of a centimeter.

• wavelength is 2.3 cm

• wavelength is 1.3 cm

• wavelength is 1 inch

Tags

NGSS.MS-PS4-1

Examine the diagram shown below. Select three choices that correctly match the letters shown in the diagram above?

• A- Wavelength

• B-Frequency

• B- Amplitude

• D- Trough

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NGSS.MS-PS4-1

Examine the patterns in the following graph. Select three choices below that accurately describe this graph.

• Both waves have the same wavelength.

• Both waves are electromagnet waves.

• Both waves have the same amplitude.

• Both waves have the same frequency.

Tags

NGSS.MS-PS4-1