Lesson 11 — 1st online lesson


Sound calculations
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Slide 1: Diapositive
speed calculationsVoortgezet speciaal onderwijsLeerroute 2

Cette leçon contient 16 diapositives, avec quiz interactifs, diapositives de texte et 1 vidéo.

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Sound calculations

Slide 1 - Diapositive

Slide 2 - Vidéo

Learning goals
  • Learn to calculate the speed of sound using distance and time

  • Learn to calculate the speed of sound using wavelength and frequency

Slide 3 - Diapositive

Two formulas to calculate the speed of sound

Slide 4 - Diapositive

Two formulas to calculate the speed of sound
speed=timedistance

Slide 5 - Diapositive

Two formulas to calculate the speed of sound
speed=timedistance
speedofsound=wavelengthfrequency

Slide 6 - Diapositive

speedofsound=wavelengthfrequency
  • Frequency: The amount of waves in one second

  • Wavelength: the length of one wave

  • Frequency • wavelength = the distance traveled in one second

Slide 7 - Diapositive

speed=timedistance
v=td
  • v: speed in m/s
  • d: distance in m
  • t: time in s

Slide 8 - Diapositive

speed=timedistance
v=td
  • v: speed in m/s
  • d: distance in m
  • t: time in s

3=26

Slide 9 - Diapositive

  • vs: the speed of sound (m/s)
  • λ: wavelength (m)
  • f: frequency (Hz)

speedofsound=wavelengthfrequency
v= λ • f

Slide 10 - Diapositive

  • vs: the speed of sound (m/s)
  • λ: wavelength (m)
  • f: frequency (Hz)

speedofsound=wavelengthfrequency
v= λ • f
6=23

Slide 11 - Diapositive


 Someone makes a yell in a mountain valley. The closest mountain is at a distance of 411,6 meters away from them. The speed of sound in air is 343 m/s.  How long will it take before they hear the echo?
A
4,8 seconds
B
3 seconds
C
5 seconds
D
2,4 seconds

Slide 12 - Quiz

Given:
  • v = 343 m/s
  • d = 411,6 m x 2 = 823,2 m

Asked:
  • How long will it take before they hear the echo?

Formula:
  •  v = d/t     —>       t = d/v

Calculation:
  •  t = 823,2 / 343 = 2,4 s
 Someone makes a yell in a mountain valley. The closest mountain is at a distance of 411,6 meters away from them. The speed of sound in air is 343 m/s. How long will it take before they hear the echo?

Slide 13 - Diapositive


A sound wave traveling through copper has a frequency of 400Hz. It has a wavelength of 5,65m. 

Calculate the speed of sound in copper.


A
70.8 m/s
B
600 m/s
C
2260 m/s
D
2460 m/s

Slide 14 - Quiz

Given:
  • Frequency = 400 Hz
  • Wavelength = 5.65 m

Asked:
  • Calculate the speed of sound in copper

Formula:
  •  Speed of sound = wavelength • frequency

Calculation:
  •  Speed of sound = 400 x 5,65 = 2260 m/s
A sound wave traveling through copper has a frequency of 400 Hz. It has a wavelength of 5,65 m. Calculate the speed of sound in copper.

Slide 15 - Diapositive

Learning goals
  • Learn to calculate the speed of sound using distance and time

  • Learn to calculate the speed of sound using wavelength and frequency

Slide 16 - Diapositive