Everything Science Grade 10

8.7 CHAPTER 8. TRANSVERSE WAVES

11. Study the following diagram and answer the questions:

Ab

Bb

Cb

bD

bE

Fb

b

G

bH

Ib

Jb

Kb

bL

bM

Nb

b

O

bP

bQ

a. Identify two sets of points that are in phase.

b. Identify two sets of points that are out of phase.

c. Identify any two points that would indicate a wavelength.

12. Tom is fishing from a pier and notices that four wave crests pass by in 8 s

and estimates the distance between two successive crests is 4 m. The tim-

ing starts with the first crest and ends with the fourth. Calculate the speed

of the wave.

More practice video solutions or help at http://www.everythingscience.co.za

(1.) 0039 (2.) 003a (3.) 003b (4.) 003c (5.) 003d (6.) 003e

(7.) 003f (8.) 003g (9.) 003h (10.) 003i (11.) 003j (12.) 003k

Chapter 8 | Summary

See the summary presentation ( Presentation: VPguj at http://www.everythingscience.co.za)

• A wave is formed when a continuous number of pulses are transmitted through a
  medium.


• A crest is the highest point a particle in the medium rises to.


• A trough is the lowest point a particle in the medium sinks to.


• In a transverse wave, the particles move perpendicular to the motion of the wave.


• The amplitude (A) is the maximum distance from equilibrium position to a crest (or
  trough), or the maximum displacement of a particle in a wave from its position of
  rest.

154 Physics: Waves, Sound and Light