Equations Unit 6

Question 1

Frequency (hz)

Answer 1

Period / Time

Question 2

Wave velocity

Answer 2

Wavelength / time or
wavelength * frequency

Question 3

Decibels

Answer 3

10 * log10 * (intensity / 1e-12)

Question 4

Beat

Answer 4

|frequency of wave 1 - frequency of wave 2|

Question 5

Wavelength

Answer 5

2 * string length

Question 6

Doppler effect

Answer 6

observed frequency = actual frequency * ((speed of sound + speed of observer) / (speed of sound - speed of source))

If the observer is moving toward the source: vo​ is positive

If the source is moving toward the observer: vs​ is positive

If they are moving away, use negative signs accordingly