t waves and sound jeopardy t today’s topics are…

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Waves and SoundJeopardy

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Today’s topics are….

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Basics

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Sound Off

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Encounters

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Resonate Me…

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Wildcard

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Basics Sound Off Encounters Resonate Me… Wildcard

FJ

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This is the source of all wave motion…

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What is a vibration?

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This is defined as the distance

between successive points

on a wave.

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What is wavelength?

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This is why breaking a brick over your

head is safer than bouncing the brick

off your head.

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This is the time needed for a wave to

complete one full cycle.

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What is period?

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This is the region on a longitudinal wave

that corresponds to a trough on a

transverse wave.

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What is a rarefaction?

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Quadrupling the distance from a

source of sound will do this to the intensity.

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This is why breaking a brick over your

head is safer than bouncing the brick

off your head.

T The wave below was produced when a girl sings for 0.04 seconds. Assuming the speed of sound is

320 m/s, this is the wave’s frequency and wavelength.

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What is frequency = 300 Hz

and wavelength = 1.07 m?

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Sound is this type of

mechanical wave.

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What is a longitudinal

wave?

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This is the greatest determining factor for the speed of

sound in a medium.

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What is the elasticity of the

medium?

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This is roughly how many times faster than the

speed of sound the plane below is traveling.

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What five times?

T A singer produces a sound wave that has a distance of

6.4 meters between successive crests. If it takes 0.02 seconds for a full wave

to pass a listener in the audience, this is the wave’s

frequency and velocity.

T This is the direction the source of sound is moving during the Doppler Shift.

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What is to the right?

T A singer produces a sound wave that has a distance of

6.4 meters between successive crests. If it takes 0.02 seconds for a full wave

to pass a listener in the audience, this is the wave’s

frequency and velocity.

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What is frequency = 50 Hz

and velocity = 320 m/s?

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This is the type of collision that one or

more bodies are deformed and heat is

lost.

TThis is what will happen when the two waves below meet.

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What is destructive

interference?

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This what bats use to find food.

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What is ultrasonic radar (sonar, echo,

reflection)?

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This is the type of interference the

creates a standing waves

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What are both constructive and

destructive interference.

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Daily Double!

T A 1134-Hz tuning fork is sounded at the same time

a piano note is struck. You hear three beats per

second. This is the frequency of the piano

string.

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What is 1131 Hz or 1137 Hz??

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This is the number of full waves, nodes and

antinodes tin the following standing wave.

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What is 2 waves, 5

nodes and 4 antinodes?

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This is what forcing a body to vibrate at

its own natural frequency is called.

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What is resonance?

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This bridge collapsed in large part due to

resonance.

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What is the Tacoma Narrows

Bridge?

T This is the work needed and power exerted by

500 kg Stay Puff Marshmallow Man to

climb a 200m high building in 10 seconds.

Assume g =10 m/s2

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This type of resonance tube has an antinode on

either end when it is resonating.

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What is W = 1.0 x106 J and

P = 1.0 x 105 W?

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What is an open tube?

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This is a sketch of an open tube

experiencing its 3rd level of resonance.

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What is 340 Hz?

T What isL = 3/2

f = v/(2/3L) = 3f1

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A 15 centimeter closed tube resonates at 480 Hz. This will be the next tube length that will resonate with the same 480 Hz.

T This is the work needed and power exerted by

500 kg Stay Puff Marshmallow Man to

climb a 200m high building in 10 seconds.

Assume g =10 m/s2

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This is the level of resonance for this

resonating closed tube.

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What is the 3rd level of

resonance?

T This is the number of antinodes shown in the

following standing wave.

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What is 2?

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This is how increasing frequency and the

amplitude of a sound wave will effect what a

listener will hear.

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What is:Increasing frequency

means a higher pitch and increasing amplitude

means a louder sound?

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This type of mechanical wave vibrates the material is passes

through perpendicular to the direction the waves

is traveling in.

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What is a transverse wave?

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This type of interference occurs

when the crests of two waves encounter one

another.

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What is constructive interference?

T This observer hears the louder sound.

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What is the both do?

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Final Jeopardy

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Some of a wave's energy is always

being dissipated as heat. In time, this

will reduce the wave's…

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What is amplitude?