Calculations
Types and properties of waves.
Wave Interference
Standing Waves and Sound
Amplifying sound
100
What is the frequency of a pendulum with a period of 2 seconds.
0.5 (1/2)
100
This type of wave has an up and down motion.
What is a transverse wave
100
This type of intereference is caused when waves are in phase.
What is constructive interference
100
What part of a standing wave can a student hold without affecting it?
What is the node.
100
What is an object's natural frequency?
The natural vibrations of an object.
200
What is the beat frequency of 246 Hz and 243 Hz waves?
What is 3
200
This type of wave oscillates along the path parallel to it's direction.
What is a longitudinal wave.
200
This type of interference is caused when waves are out of phase.
What is destructive interference.
200
What is the highest point of the standing wave called (part that moves)?
What is the antinode
200
What happens when an external vibration matches the natural frequency of another object?
You create resonance which increases the amplitude of the vibration.
300
What is the speed of a wave if its frequency is 5 Hz and the wavelength is 10 m.
What is 50 m/s
300
The distance from crest to crest of a wave.
What is the wavelength
300
What is the affect when two sound waves with slightly different frequencies come together?
Beats
300
The low pressure part of a sound wave is called a _______and the high pressure part is called a _____
rarefaction, compression
300
What is the difference between loudness and intensity?
Intensity is measurable (objective) while loudness depends on each person (subjective).
400
What is the frequency of sound if the wave is 170 meters long. (speed is 340 m/s)
What is 2 Hz.
400
How fast must an object move in order to create a bow wave?
What is faster than the speed of the wave.
400
What is the amplitude of the resulting wave if two waves come together in phase, one with an amplitude of 3 m and the other with an amplitude of 4 m.
What is 7 m.
400
Sound travels fastest in which object: putty, water, air, metal
What is metal
400
How much more intense is a 140 dB sound compared to a 120 dB sound?
What is 100.
500
What is the wavelength of a kitchen microwave with a frequency of 2450 megahertz (2,450,000,000 Hz). (speed of light is 300000000 m/s)
What is .12 m or 12 cm
500
Scientists discovered that galaxies are travelling away from each other because of this due to the Doppler effect.
What is red shift. The light is being seen at a lower frequency.
500
This type of wave is created when waves bouncing back cause constructive and destructive interference at certain areas of the wave.
What is a standing wave.
500
What is the wavelength of a standing wave's first harmonic on a 3 meter long rope?
What is 6 meters
500
What is the purpose of a sound board.
The sound board is forced to vibrate. The larger area of the sound board will make it louder.
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