Karteikarten
Sound
Karten in diesem Stapel (10)
- 1What type of waves are sound waves? Light Transverse LongitudinalSound waves are longitudinal waves. They vibrate in the same direction of travel.
- 2Which do sound waves travel fastest through? Solid Gas LiquidSound waves travels fastest through solids because the particles are closest together.
- 3What are the areas where particles are pulled further apart in sound waves called? Compression Vacuum RarefactionThe areas where particles are pulled further apart in sound waves are called areas of rarefaction.
- 4What is the name given to the range above human hearing? Infrasound Ultrasound InfraredSounds above the human range of hearing are called ultrasound. This is about 20,000 hertz.
- 5What is the speed of sound in air? 300 000 km/s 340 m/s 340 miles per hourThe speed of sound in air is about 340 m/s.
- 6Which of these is the correct order for the speed of waves starting with the fastest? Sound, light, water Light, water, sound Light, sound, waterWaves travel fastest in light, then sound and finally water.
- 7Which of these is the correct equation for speed? speed = distance ÷ time speed = distance × time distance = speed × timeThe correct equation for speed is speed = distance ÷ time.
- 8Where is SONAR used? In hospitals to find broken bones In fishing boats to find fish In hospitals to look at unborn babiesSONAR is used in fishing boats to identify shoals of fish to catch.
- 9What are the units of frequency? Joules Decibels HertzThe units of frequency are hertz.
- 10What is the correct scientific term for pitch? Frequency Amplitude WavelengthFrequency is the correct scientific term for pitch.