Chapter 15: Mechanical Waves

Question 1

Define: Transverse Waves

Answer 1

A wave that oscillates perpendicularly to the direction of propagation

Question 2

Define: Propagation

Answer 2

Transmission of motion, light, sound in a particular direction or through a medium

Question 3

Define: Medium

Answer 3

The intervening substance (ex. Air, Materials, Liquids)

Question 4

Define: Longitudinal Wvaes

Answer 4

A wave that oscillates parallel to the direction of propagation

Question 5

Define: Wavelength ( λ )

Answer 5

The horizontal distance from crest to crest

Question 6

Define: Crest

Answer 6

The highest point above a waves’ surface (positive amplitude)

Question 7

Define: Trough

Answer 7

The lowest point on a wave (negative amplitude)

Question 8

Formula: v ( wave speed )

Answer 8

( Δx / Δt ) OR ( λ / T ) OR ( λ f ) OR ( ω / k )

Question 9

Wave Function (when wave starts at y=0 )

Answer 9

y( x , t ) = A sin ( k x ± ωt )

Question 10

Wave function (when wave starts y=±A)

Answer 10

y( x , t ) = A cos ( k x ± ωt )

Question 11

Formula: k (wavenumber)

Answer 11

k = 2π / λ

Question 12

Transverse Velocity of Waves (starts at y=0)

Answer 12

v_T(x , t)= ± ωA cos (k x ± ω t)

Question 13

Transverse Velocity of Waves (starts at y=