Physics help ?????????

Question

A sound wave of wavelength 0.70m and velocity 330m/s is produces for 0.5s.

A) what is the frequency of the wave ?

B) How many complete waves are emitted in this time interval ?

hint: use frequency = number of cycles per second

C) after 0.5 s, how far is the front of the wave from the source of the sound ?

Answer 1

A) velocity = f x wavelength

f = v/wavelength = 330/0.7 = 471.43 Hz

B) 471.43 waves in one second so in 0.5 there will be 431.43/2 =235.7 or 235 complete waves.

C) In 0.5 s wave travels 330/2 metres = 165m.

Answer 2

a)frequency = 1/0.5

   =2

b) 330 x 0.5 = 165

  165/0.7 =235.7

(i cant think of this)

c)165m?