A note of frequency 375Hz is sounded in air at temp of -5degrees celcious. Find its wavelength?

Question

its about physics.....physics 112................i need the wave length in the question

Answer 1

wavelength = speed of sound / frequency

c at -5C is 323 m/s (wiki link) They give you freq. Plugnchug.

Edit: if you want to calculate c yourself, use

c = sqrt (gamma pressure / density) = sqrt (gamma R T / M)

T in Kelvin, look up R, gamma is very nearly 7/5 for air, which is mostly diatomic gas O2 N2. M is the avg molecular weight of air.

Answer 2

to find the wave length divide the frequency into 300 the 300 represents the speed of light, you do not need to use all the noughts. therefore 300 divided .375= 800 metres. I have put the decimal point in as it under 1 megz.

as another example for you.300 devided 3.5 mhz =85.7metres. hope this of help. as a radio ham i do not have to take temp. into the sum.

Answer 3

Always write out the variables and any formulas that might be relevant. This in itself can really help you answer the question.

c = f * (lambda) where symbol lambda = wavelength

f = 375 Hz

c = ?
wavelength = ?

You have to calculate the speed of sound in air at temp of -5 Celsius before you can use the above formula. Your textbook should help you figure this out: It helps to actually open it.

Answer 4

Wave length should be 8.0 x 10 to the fifth meters.

Answer 5

245 miles and 3 inches

Answer 6

Previous answer contains a mistake - speed of sound in air at -5C is 328.3m/s, so the answer is 875.467 mm

Answer 7

f=1/t Where f = frequency and t = wavelength

Answer 8

velocity of sound is in air

v= 331+0.5*t(celsius ) so v (-5) =331-0.5*5 =328.5m/s

wavelength = velocity/frequency=328.5/375=0.876m