t waves and sound jeopardy t today’s topics are…
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T Today’s topics are….TRANSCRIPT
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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
$100 $100 $100 $100 $100
$200 $200 $200 $200 $200
$300 $300 $300 $300 $300
$400 $400 $400 $400 $400
$500 $500 $500 $500 $500
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?