Sound and Waves Jeopardy

Wave Properties

100

What is the one thing that affects the speed of a wave?

The Medium

200

A boat generates 20 crests in 8 seconds. Determine the frequency of the water wave. 

2.5 Hz

300

A wave has a frequency of 200 Hz and a wavelength of 2m. If the frequency becomes 100 Hz, what does the wavelength become?

1m

400

A standing wave on a 10m long spring creates 5 nodes and has a frequency of 2.5 Hz. Determine the speed of the standing wave

10 m/s

500

Mr.Farrell bounces a basketball 8 times in 2 seconds. Determine the period of this. 

0.25 seconds

Sound

100

Sound waves are a ________ type wave

Longitudinal

200

The temperature in the air is 20 degrees Celsius. What is the speed of sound?

343 m/s

300

Rank the following mediums from fastest speed of sound to slowest speed of sound:

1) Air

2) Concrete

3) Water

1) Concrete

2) Water

3) Air

400

A car horn has a frequency of 300 Hz, as it drives away from a bystander at a speed of 70 m/s, what frequency does the bystander hear?

Doppler

500

Find the mach number of a rocket traveling at 2500 km/h in 40 degree Celsius air.

S.o.S formula

Music

100

How man beats do a 337 Hz and 400 Hz tuning fork produce when sounded together?

3 beats

200

A string produces a frequency of 400 Hz when it vibrates with a tension force of 36N. The tension in the string is increased to 49N , what is the new frequency? 

544 Hz

300

Why does a guitar produce a musical sound that is loud, 

while a rubber band does not?

Resonance with body of instrument, and Overtones produced by guitar strings.

400

Flutes, Oboes, and Clarinets are similar to what type of air column? 

Open-Ended Air Column

500

If the frequency of a strings 3rd overtone is 300Hz, determine the frequency of the second overtone and the fundamental frequency

300 Hz = fo * 3

fundamental = 100 Hz

Second overtone = fo * 2 = 200 Hz

Waves in Medium/Other

100

Yes or no; does the speed of a wave change speed after it is reflected? 

No

200

When a crest travels from a slow medium to a fast medium, what is reflected? 

Crest

300

When a crest travels from a slow medium to a fast medium, what is reflected?

A Trough

400

Haunted houses and horror movies use this type of sound to unsettle people.

Infrasound

500

Does sound travel in the vacuum of space?

No

Resonance

100

What frequency does an object vibrate at when struck?

Natural Frequency

200

A closed end air column experiences resonance when it is 9 cm long. Determine the wavelength of the sound

36cm

300

Resonance in sound waves takes the form of what wave pattern?

Standing Waves

400

How many times louder is a 10dB sound compared to a 30dB sound? 

4 times as loud

500

An open ended air column is resonating at it's second resonant length. If the speed of sound is 341 m/s, what is the frequency emitted out of this column if it is 0.3m long? 

lambda = 0.3m 

f = v/lambda

f = 341/0.3

f = 1137 Hz