Question

The frequency of an AM radio is 1.4 x 106 hertz (cycles per second). Approximately, how many cycles are completed in a minute?

Answer 1

I guess the frequency is meant to read 1.4×10⁶Hz. In a minute we have 60 times as many: 84×10⁶=8.4×10⁷ cycles per minute.

Answer 2

`x=8.4x10^(7) cycles/min`

Explanation:

To answer the question we have to use the rule of three.

If in a second the radio wave does
`1.4x10^(6)` cycles, how many cycles would do per minute, that is, in 60 seconds?

`x=1.4x10^(6)(cycles)/(sec)(60 sec)/(1min)=84x10^(6) cycles/min \\x=8.4x10^(7) cycles/min`

Therefore, the frequency would be
`x=8.4x10^(7) cycles/min`