chapter 12 Flashcards
What the 2 differnt ways waves can move called
transverse and longitudinal
What is the differnce between the 2 different types of waves
a longitudinal waves vibrations move paralel to the direction of wave travel. In transverse waves the vibrations are at a right angle to the direction of travel
Whats the definition of amplitude
the maxium displacement of the wave from its undisturbed position
whats the defonition of wave length
the distance from a point on the wave to the equivalent point on the adjacent wave
whast the defonition of frequency
the number of waves passing past a fixed point per second
whats the equation for freuency
time=1/frequency
whats the equation for wave speed
wavespeed=frequency*wavelength
whats the defonition of a wave
the transfer of energy from one point to another
Whats a mechanical wave
a wave that vibrated through a medium
whats a electrostatic wave
waves that can travel through a vacuum (no medium is needed)
what are sound waves
vibrations that travel through a medium
Why cant sound travel in a vacuum
sound needs particles to travel
how do we hear sound
sound waves vibrate the ear drum
what is the frequency range humans can hear
20hz-20khz
what does refaction do to the wave
change its direction
what 3 things happen to light when it hits a boundry
reflected,transmitetd and absorbed
what are some uses of ultra sound
pre natal scanning and cleanign jewlerary
what 3 things happen when sound hits a boundry
reflect absorbed and transmitted(pass through)
when workign out an echo what do you need to remember to do
divide by 2
whats an x rays main disadvantage
ionising radiaition
how are seismic waved produced
in an earthquake
whats the epicentre
the nearest point on the surface to where the earthquake orginates
what type of wave is a P-wave
longitudinal
what type of wave is a S-wave
transverse
