Show:
Grab Bag
Wave Characteristics
Sound
Standing Waves
Speed of Waves
100
What is a periodic disturbance that transfers energy?
a wave
100

When the speed of a wave is doubled, the wavelength is......

Doubled

100
What type of wave are sound waves?
longitudinal (mechanical)
100

Position of Maximum Displacement

Antinode

100
When the speed of a wave doubles, the freqency....

stays the same

200
What is the physical environment that waves occur in?
medium
200

What is the lowest point of a wave?

trough

200
What is the measure of how high or how low a wave sounds?
pitch
200

Standing waves are the result of _________________________. (a property of waves)

Interference/Superposition and Reflection



200

When the frequency of a wave doubles, the wavelength 

is halved

300
What are waves the require a medium (such as sound)?
mechanical waves
300

What does the wavelength of a wave depend on?

Frequency AND speed

300

Waah Waah Waah Waah Sound when two frequencies are played close together. 

Beat Frequency

300

The distance between an antinode, and the next node is ________ of a wavelength

one fourth.

300

Dave yells into a canyon and hears his echo 2 seconds later.  How far away is the canyon wall? (assume 340m/s) 

340m 

400
What are waves where the particles move perpendicular to the direction of motion?
transverse waves
400

A standing wave has 5 nodes and 4 antinodes. How many wavelengths long is it?

2 wavelengths

400

Find the fundamental frequency of a CLOSED pipe 50cm long. 

170 Hz

400

A guitar string is 40cm long.  How long is the wavelength for the fundamental frequency. 

80cm

400

On a very cold day, the speed of sound slows to 333m/s,  What is the temperature? 

5 degrees celsius

500

What direction of polarization should sunglasses have to block glare from a puddle of water

Vertical

500

What is the time it takes for a wave to complete one cycle?

period

500

What causes sound waves?

vibrations

500

A guitar string is 30cm long. When it is plucked, it vibrates at a frequency of 500Hz.  Calculate the speed of the waves in the string. 

300m/s

500
A 512 Hz tuning fork resonates a closed pipe when it is 16cm long.  What is the temperature in the room? 

-4C

600

 If all light waves from a source have a single orientation, it is referred to as ____________

Polarized. 

600

When objects are approaching one another, the observed frequency of a wave will be _______ than the source.

Higher

600

If a single bird song has a sound level of 20dB, how loud would 1000 Birds sound?

50dB


1000 times as intense = 10*10*10 --->

Decibel Level: 20+10 +10 +10 = 50

600

A closed pipe resonator is 30cm long.  What is the fundamental frequency 

285Hz

700

The conditions for Resonance

Forced Vibration = Natural Frequency

700

A tuning is played along side a piano string at the same time.  The tuner hears a beat freqency of 2Hz.  If the tuning fork is 512 Hz....What frequencies could the piano be vibrating with? 

510 or 514

700

A closed pipe is 30cm long. An open pipe is 59cm long.  What is the beat frequency that would be heard if they are played at the same time?

5 Hz

CLOSED: F1 = 283Hz

Open: F1 = 288Hz

Beat Frequency: 288-283 = 5Hz

700

A closed pipe resonator has a first OVERTONE (first resonant frequency higher than the fundamental frequency ) of 900 Hz . How long is the pipe? 

0.286m long