Whats its wavelength?

Question

the frequency of a certain sound is 440hz. what is the wavelength of the sound when the temperature is:

a. 20 degrees celsius

b. 30 degrees celsius

»i forgot the formula.. pls help, n pls show the solution..

tnx!

Answer 1

v=λ*f

v:The speed of sound

λ:the wavelength

so λ=v/f

The speed of sound describes how much distance such a wave travels in a certain amount of time. In dry air at 20 °C (68 °F), the speed of sound is 343 m/s (1235 km/h, or 770 mph, or 1129 ft/s, or approximately 5 seconds per mile).

Answer 2

studenthelper-

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Answer 3

* The length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next; it is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency.

*velocity = wavelength x frequency

*For sound waves in air, this is the speed of sound, 345 m/s (1238 km/h) in air at room temperature and atmospheric pressure

* v = 331 m/s + (0.6 m/s/C)•T

where T is the temperature of the air in degrees Celsius.

*Using this equation to determine the speed of a sound wave in air at a temperature of 20 degrees Celsius yields the following solution.

v = 331 m/s + (0.6 m/s/C)•T

v = 331 m/s + (0.6 m/s/C)•(20 C)

v = 331 m/s + 12 m/s

v = 343 m/s