P12.1-4

Question 1

mechanical vs electromagnetic waves

Answer 1

sound waves, water waves, waves on springs and ropes, and seismic
waves produced by earthquakes. These are all examples of mechanical
waves, which are vibrations that travel through a medium (a substance).

light waves, radio waves, and microwaves. These are all examples of
electromagnetic waves, which can all travel through a vacuum at the same speed (300km/s), no medium needed

Question 2

transverse vs longitudinal waves

Answer 2

t: oscillations perpendicular to d. travel
l: oscillations parallel to d. travel

Question 3

Answer 3

Question 4

time period

Answer 4

time taken for one complete wave to pass a point

Question 5

amplitude, wavelength, grequency

Answer 5

A: the maximum displacement of a point on the wave from its undisturbed position
W: distance from a point on the wave to the equivalent point on the adjacent wave
F: number of waves passing a fixed point every second

Question 6

wavespeed

Answer 6

f x wavelength
(or distance / time)

Question 7

how to measure speed of sound in air

Answer 7

Question 8

why is human hearing limited

Answer 8

Within the ear, sound waves cause the ear drum and other parts to vibrate which causes the sensation of sound. The conversion of sound waves to vibrations of solids works over a limited frequency range. This restricts the limits of human hearing.

Question 9

investigating waves using a ripple tank

Answer 9

Question 10

investigating sound waves RP

Answer 10