Flashcards
Waves
Cards in this deck (29)
- 1What is a wave?A regular disturbance in a material or medium (means of communication)
- 2What are the two types of waves?Transverse and longitudal
- 3Name an example of a longitudal waveSound waves
- 4In longitudal waves, the vibrations travel in the same direction as what?The energy transfer
- 5What is the wavelength?The distance between two identical points on a wave in metres
- 6What is the amplitude?The height of the wave
- 7What is the frequency?The number of waves passing a point in one second, measured in Hertz
- 8What is the velocity (speed)?How far a crest travels in one second, measured in m/s
- 9How do we work out the velocity, wavelength and frequency?velocity = wavelength x frequency
- 10What is ultrasound?An acoustic (sound) energy with a frequency above the human hearing range
- 11Name two things ultrasound can be used fr medicallyPre-natal scans and the removal of kidney stones
- 12What are the proper names for Primary and Secondary waves?Primary=Longitudal
Secondary=Transverse - 13What can longitudal (primary) waves travel through?Solids and liquids
- 14What can transverse (secondary) waves trvale through?Just solids
- 15What word describes an empty space where there is no air?Vacuum
- 16What is the useful energy transfer in a battery?chemical ---> electrical
- 17What is the useful energy transfer in an electrical bell?electrical ---> sound
- 18Why can you not hear sound in a vacuum?There are no particales in a vacuum, so sound waves cannot be transmitted
- 19What do you do to make sound quieter?Decrease the amplitude
- 20What do you do to make the sound higher pitched?Increase the frequency
- 21What do you do to make the sound lower pitched?Decrease the frequency
- 22What do you do to make sound louder?Increase the amplitude
- 23Primary waves travel .................. than secondary wavesFaster
- 24When ................ waves travel aross water, the disturbance is at .............. angles to the direction in which the wave is travellingTransverse
Right - 25When ................ waves travel through air, the disturbance is .................. to the direction in which the wave is travellingLongitudal
Parallel - 26What type of wave can travel through vacuum?Electro-magnetic waves
- 27Whta happens when waves move through a gap? What is this called?They spread out. This is called diffraction
- 28How could the position of a flaw during an ultrasound be calculated?Time the reflections then use distance = speed of ultrasonic waves x time
- 29Name three uses of optical fibresCable TV, telephones and lighting/decorations
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- GCSE Physics (Waves) Flashcards on Waves, created by potet13 on 30/05/2016.
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- potet13
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