. [Tipler5 15.P.049.] A sound wave in air produces a pressure variation given by the following formula, where p is in pascals, x is in meters, and t is in seconds.(adsbygoogle = window.adsbygoogle || []).push({});

p(x,t) = 0.70 cos /2 (x - 330t)

(a) Find the pressure amplitude of the sound wave.

correct check mark Pa

(b) Find the wavelength.

wrong check mark m

(c) Find the frequency.

wrong check mark Hz

(d) Find the speed.

m/s

The only part i got is (a) which is obvious 0.70....

i cant get the other ones and i only have 1 more go at them. I tried frequency = w=2(pi)f so w/2(pi) = f... but that didnt work... also 330 by itself didnt work? i tought the frequency in a wave was determined by the number before t? =\ Im really confused and i read over the book 3 times already and i cant figure it out? (theres only half a page on pressure and waves)

Any help appreciated... thanks a lot!

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# Homework Help: Wave Changing Air Pressure (should be easy, help please!)

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