Sound And Waves Flashcards
Transversal waves
A wave where vibrations are at 90 degrees to the direction of movement of wave length
Longitudinal waves
A wave whose vibrations are parallel to the direction of travel of wave energy
Wavelength
The distance between 2 successive crests
(Measured in meters)
Also called lamba
Amplitude
Maximum displacement from equilibrium position
Sound waves
Vibrations of sound that travel through the waves are called sound waves
Key points
Sound waves are caused by vibrations
Sound waves are longitudinal
Sound waves need a material to travel through
Sounds waves can travel through solids, liquids and gases
Speed of sound in air and water
330 m/s - air
1500 m/s -water
6000 m/s -solid
Speed of sound with different temp, pressure, materials
The speed of sound depends on the temperature of the air
(Sound travels faster in hot air than in cold air)
Speed of sound does not depend on the pressure of air
Speed of sound is different in different materials
Speed of sound formula
Speed =distance /time
Speed of an echo
Speed = distance x 2 /time
Frequency
The number of oscillations per second
Measured in hertz
High pitch
When u hear high frequencies or high notes
Low pitch
When you hear low frequencies or low notes
Wavelength formula
Wavelength = speed /frequency
