15.2

Question 1

Amplitude:

Answer 1

The amplitude of a wave is the maximum distance that the wave moves from its restitution.

Question 2

Frequency:

Answer 2

The number of wavelengths that pass by a point each second.

Question 3

Calculating a wave’s frequency:

Answer 3

Divide the number of wavelengths by the time. (use Hz)
As the frequency of a wave increases, the wavelength decreases.

Question 4

Calculating a wave’s speed:

Answer 4

multiply the wavelength by the frequency

Question 5

As the frequency of a wave _____, the wavelength ______.

Answer 5

1)increases
2)decreases

Question 6

Mechanical waves usually travel fastest in _____ and slowest in _____.

Answer 6

1)solids
2)gasses

Question 7

Electromagnetic waves move fastest in _____ _____and slowest in ____.

Answer 7

1)empty space
2)solids