Waves

Which wave in the diagram has the greatest frequency?

• 1
• 2
• 3
• 4

Which letter(s) represent the trough of the wave?

• A

• B & D

• D

• C & G

Which letter(s) represent the crest of the wave?

• A

• B & D

• B & F

• F

How many waves are in this wave chain?

• 6
• 3
• 4
• 5

A tennis coach paces back and forth along the sideline 10 times in 2 minutes. The frequency of her pacing is 

• 5 Hz
• 5 s
• 0.08 Hz
• 0.08 s

The blue-throated hummingbird flaps its wings 300 times a minute.  What is its frequency?

• 5 hz
• 300 hz
• 300/60 
• a lot?

1.  Frieda the fly flaps its wings back and forth 121 times each second. The period of the wing flapping is 

• 0.008 Hz
• 0.008 s
• 121 Hz
• 121 s

The frequency of violet light is 7.5x10¹⁴ Hz. What is its wavelength?

• 4.0x10^-7 m

• 4.0x10⁷ m

• 2.25x10²³m

• 2.25x10²³ Hz

The unit for measuring frequency is the ---

• Joule

• Hertz

• Gram

• Newton

_______ is the number of waves that pass a certain point at an specific time. 

• Frequency 
• Pitch
• Amplitude
• I don't know