Check your test using the answer sheet of the version of the test you made.
Slide 3 - Slide
Sound — Calculations
Calculating the speed of sound in different circumstances.
Slide 4 - Slide
Sound — Calculations
The speed of sound in air is 330 m/s. A person shoots a gun in a mountain valley. 2,5 seconds later he hears the echo. How far away is the nearest mountain from him? Write out your calculation.
Slide 5 - Slide
The speed of sound in air is 330 m/s. A person shoots a gun in a mountain valley. 2,5 seconds later he hears the echo. How far away is the nearest mountain from him? Write out your calculation.
v = 330 m/s
t = 2,5 s / 2 = 1.25 s
d = v • t = 1,25 x 330 = 412,5 m
v=td
d=v⋅t
Slide 6 - Slide
Sound — Calculations
The speed of sound in air is 330 m/s. A person shoots a gun in a mountain valley. 2,5 seconds later he hears the echo. How far away is the nearest mountain from him? Write out your calculation
v = d/t d = v • t
v = 330 m/s
t = 2,5 s / 2 = 1.25 s
d = v • t = 1,25 x 330 = 412,5 m
Slide 7 - Slide
Sound — Calculations
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.
Hint
frequency: the amount of waves per second
Wavelength: the length of one wave
Slide 8 - Slide
Sound — Calculations
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.
400 waves per second.
One wave has a length of 5,65 meter.
In one second the sound travels a distance of 440 • 5,65 meters — 400 • 5,65 = 2260 m.
