Show:
Types of Waves
Parts of Waves
Sound
Labs
Potpourri
100
True or false, a rope tied to a pole that is being forced to move is an example of a compressional wave.
What is false.
100
The highest point of energy of a wave is know as this.
What is a crest.
100
True or False, an echo is caused by the reflection of a sound wave off of a surface.
What is true.
100
When we played a tuning fork over an air column in the speed of sound lab, the pitch got louder. What concept does this represent?
What is resonance.
100
True or False, repeated exposure to loud sound can cause arthritis.
What is false, but it can cause hearing loss.
200
The type of wave in which the medium vibrates at right angles to the direction of the energy movement is what?
What is a transverse wave.
200
The normal position of the energy of a wave is know as this (when there is no energy in the wave).
What is the rest position.
200
Frequency is measured in this.
What is hertz
200
What is the proper lab apparatus to strike a tuning fork correctly?
What is a "sounder"
200
True or false, bats can hear higher pitches than humans?
What is true.
300
In a longitudinal wave, an area of high concentration is called what?
What is a point of compression
300
As the amplitude of a wave increases, what happens to its energy?
What is it increases.
300
Sound travels fastest in what type of medium?
What is a solid such as steel.
300
Which has a higher frequency, a thick rubber band or a thin rubber band?
What is a thin rubber band.
300
If there are 5 waves occuring in 1 second, what is the frequency of this wave?
What is 5 Herz.
400
What type of wave cannot travel through a vacuum?
What is a sound wave.
400
The volume of a sound is determined by which part of a wave?
What is its amplitude.
400
What is the range of frequencys that people can hear sound?
What is 20 Hz to 20,000 Hz
400
If you blow into a graduated cylinder with lots of water in it, will you hear a high pitch or a low pitch?
What is a high pitch.
400
What are frequencies of sound above 20,000 Hz known as?
What are ultrasonic frequencys.
500
What type of a wave is a sound wave?
What is a longitudinal or a compressional wave
500
As the wavelength of a wave increases, what happens to its frequency?
What is it decreases.
500
The intensity of sound is measured in what?
What are Decibels.
500
In the speed of sound lab, a 512 Hz tuning fork produced resonance when the air column was 17 cm long. What is the speed of sound for this setup?
wavelength = 17cm * 4 = 68 cm, frequency = 512 Hz, velocity = frequency * wavelength = 512 Hz * 68 cm = 34,816 cm/s
500
What is the doppler effect?
What is an apparent change in the frequency due to the motion between a source and an observer.