. [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. 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!