Wave Speed

Review: What is the frequency of a wave?

• How fast the wave moves from one point to the next

• The time it takes for one wave to happen

• The length of a wave

• How many waves pass a fixed point in 1 second

Tags

NGSS.HS-PS4-1

Review: Frequency and period are reciprocally related. Therefore, if the frequency of a wave is 5 Hz, then the period is__________.

• 5 sec

• 1/5 sec

• 50 sec

• 1/2 sec

Tags

NGSS.HS-PS4-1

Review: frequency and period are reciprocally related. Therefore, if the period is 1/2 seconds, then the frequency is ___________.

• 2 Hz

• 1/2 Hz

• 2 sec

• 5 Hz

Tags

NGSS.HS-PS4-1

As the frequency of a wave increases, then what happens to the wavelength?

• Gets bigger / increases

• Gets smaller / decreases

Tags

NGSS.HS-PS4-1

Which material would sound travel fastest in?

• Air

• Water

• Steel

Tags

NGSS.MS-PS4-2

Why does sound travel faster in water than in air?

• The particles in water are more tightly packed together

• The particles in water are more spaced apart

Tags

NGSS.MS-PS4-2

 $V=f\lambda$  
If the frequency is 5 Hz and the wavelength is 2 m, then what is the wave's velocity?

• 10 m/s

• 5/2 m/s

• 2/5 m/s

• 7 m/s

Tags

NGSS.HS-PS4-1

 $V=f\lambda$  
If the wave velocity is 20 m/s and the wavelength is 2 m, then what is the frequency?

• 10 Hz

• 40 Hz

• 0.1 Hz

Tags

NGSS.HS-PS4-1

 $V=f\lambda$   $f=\frac{1}{T}$  
If the time period of a wave is 2 seconds and the wavelength is 4 m long, then what is the wave's velocity?

• 2 m/s

• 8 m/s

• 1/2 m/s

Tags

NGSS.MS-PS4-1

 $V=f\lambda$  
If the velocity of the wave is 10 m/s and the frequency is 5 Hz, then what is the wavelength?

• 2 m

• 50 m

• 5 m 

• 15 m

Tags

NGSS.HS-PS4-1