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Physics: Chapter 12: Sound
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- 1What type of wave is Sound Waves?Longitude waves
- 2How is sound Produced?Sound is produced by the vibration of particles in a medium (substance a wave travels through)
- 3What does the vibrations mean?Means the sound waves travel in a series of compressions (where medium is squashed together) are rarefractions (medium is stretched apart).
.... . .. ... . . . .. .. - 4What is the units for frequency?Hz
- 5What is the Human hearing range?20Hz - 20000Hz
- 6How do we hear sounds?Our ears detect vibrations then the sound wave travels up the auditory nerve to our brain which interprets the signals.
- 7What is Ultrasound?Sound with a frequency above 20,000Hz
- 8What are some examples of Ultrasound?Dog whistles
Doctors- use ultrasound to preform scans of developing foetus' - looking at organs - 9How does compressing a medium affect its sound?The more compressed the medium is the slower the speed of sound.
- 10How does the rigidness of a medium affect its sound?The more rigid a medium is the higher the peed of sound.
- 11What are the properties of a Liquid that affect its speed of sound?More rigid and less compressible than gases so speed is higher than gases.
- 12What are the properties of a Solid that affect its speed of sound?Significantly more rigid than liquids and gases, very hard to compress so speed of sound is much higher than in liquids or gases.
- 13What are the properties of a Gas that affect its speed of sound?Easily compressed so speed of sound in gas is slow.
- 14What is a signal GeneratorCan produce a sound
- 15What do you use to observe a wave, what does it show?Oscilloscope
Measures amplitude and frequency of sound wave. - 16What is the Oscilloscope Trace for a sound that is quiet and low pitched, quiet and high pitched, loud and low pitched an loud and high pitched?
- 17What does a higher frequency = in oscilloscope traces?Higher pitch (shorter wavelength)
- 18What does a larger amplitude mean?Higher volume of sound
- 19What can sound be? changedDiffracted
Reflected
Refracted - 20What is the equation for Wavelength? Word, units and symbolWavelength = wave speed / wave frequency
m = m/s / Hz
- 21How do you calculate the wave frequency?Number of oscillations / time taken
- 22What is compression?The high pressure section of the wave
- 23What is Rarefaction?The low pressure section of the wave.
- 24Label a wave
- 25Label a wave in rarefaction and compressions
- 26What is the equation for speed?Speed = distance / time
- 27How can you measure the speed of sound in air?Echo - speed equation
- 28Give speed of sound in concrete, pure water and air - just for reference of speed of sound in solids liquids and gases.Concrete - 5000m/s
Pure water - 1400m/s
Air - 330 m/s - 29What is another equation for frequency?F = 1/ t
Frequency = 1/ period of the vibration (time)
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- (Physics) GCSE Science Fichas sobre Physics: Chapter 12: Sound, creado por HRYN red el 08/06/2020.
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