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4.2 flashcards
Cards in this deck (20)
- 1what does compression mean?when particles are close together.
- 2what does transverse wave mean?A wave in which the vibration is at right angle to the direction the wave is travelling.
- 3what does frequency mean?The number of waves passing a point every second.
- 4what are sound waves?Regions of high and low pressure originating from a vibrating object and transmitted through a medium.
- 5what are two ways a wave carries energy from one point to another ?The energy carried by waves at a beach moves horizontally, but the particles making up the wave move in a vertical direction.
- 6The unit used to measure frequency wavelength and speed of soundhertz [Hz]
mertz [m]
mater/sound [m/s] - 7Movement of altering compression and refraction.sound wave
- 8Energy carried by the wave moves in the same direction as the wave particleslongitude
- 9Distance a particle in a wave moves from its rest positionwave length
- 10what is the speed of sound in air at 18 degrees Celsius ?342 m/s
- 11what is the source of vibration in a flute?The moving of the lips
- 12what are longitudinal waves?A wave in which a vibration is in the same direction as the waves is travelling.
- 13why does sound travel faster in solids?They are closely packed together,then the compressions and rarefactions will travel quickly as a result, sound travels faster through solids.
- 14what is a reflection?The bouncing of light off something.
- 15what is refraction?The bending of light as it passes from one substance into another.
- 16what is a echo?A sound that is reflected and heard a second time.
- 17what is reverberation?Length of time a sound can be heard.
- 18what is sound energy transmitted through?It is transmitted through a material as longitudinal waves.
- 19How can u hear people in the next room if there noisy?This happens because sound passes through thin walls and is transmitted short distance through most materials.
- 20How is wave length measured?It is measured in meters. a loud sound has a sound wave with steep peaks [greater amplitude as a soft sound has a wave with less steep peaks [ lower amplitude].
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- Flashcards on 4.2 flashcards, created by Rana Nabhan on 29/07/2019.
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- Rana Nabhan
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