A sound wave is passing by a student 250 times every second. What is the frequency of the sound wave?

25 s

1 second

250 Hz

1/250 Hz

My answer i believe is simply 250 Hz, because sounds or vibrations travel in 1 cycle/second, meaning the number of cycles, in your case 250, divided by the time, 1 second, will ultimately be 250 Hertz. For every Cycle/second it will equal 1 Hz, so 250/1 = 250Hz