sound
- Created by: cookieshypiggy
- Created on: 10-05-13 13:00
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- sound
- a form of energy
- longitudinal wave
- produced by vibrating medium
- push or pull on adjacent air
- causes small, rapid changes in the air pressure
- cannot be produced in vacuum
- push or pull on adjacent air
- pushing of air molecules are compressions and the layer of air has high pressure
- pulling of air molecules are rarefactions and the layer of air has low pressure
- factors
- temperature
- humidity
- density of media
- speed of sound
- v=d/t
- echo
- reflected sound waves off hard surfaces
- greater amplitude, louder sound
- higher frequency, higher pitch, waves closer together
- humans:20Hz-20000Hz
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