Question

Sry again :/ Physics. Medal + Fan Thanks :')
A drum vibrates 180 times in 2 seconds. If the speed of sound is 340m/s, what is the period, frequency and wavelength of the waves produced by the drum? The speed of light is 3 X 10^8m/s.

Answer 1

as you said in the previous problem, frequency = 180/2 =90

Answer 2

period= 1/f = 1/90

Answer 3

= 0.01

Answer 4

and the wavelength is calculated by
\[v=\dfrac{\lambda}{period} \\\lambda = v *period\]
you force me look up my physics book which I "swear" I never touch after I passed the course. hehehe
@dan815 he is engineer expert

Answer 5

:D tanks :;)