An FM radio station broadcasts at 80.9MHz. Determine the period of the radio waves.

i know period is just 1/freq. so what would i convert 80.9 MHz into???

The period is the reciprocal of the frequency, as you stated.

80.9 MHz means 80.9*10^6 cycles per second

P = 1/f = 1/(80.9*10^6 s^-1)
= 1.24*10^-8 seconds

To determine the period of the radio waves, you need to convert the frequency from megahertz (MHz) to hertz (Hz).

1 MHz is equal to 1,000,000 Hz. So, to convert 80.9 MHz to Hz, you can multiply it by 1,000,000:

80.9 MHz * 1,000,000 = 80,900,000 Hz

Now that you have the frequency in Hz, you can calculate the period using the formula:

Period = 1 / Frequency

Period = 1 / 80,900,000 Hz

Therefore, the period of the radio waves is approximately 0.00000001235 seconds or 12.35 nanoseconds.