Question

1) A speaker vibrates at a frequency of 2500 Hz. What is its period?

2) A swing has a period of 15 seconds. What is its frequency?
Please help, thank you!

Answer 1

It's easier for you to solve these than to try and read my solutions if I solve them.

Use this magic formula:

(period) · (frequency) = 1

If you handle the magic formula carefully and correctly, you can get these facts out of it:

-- Period = 1 / frequency

-- Frequency = 1 / period

Use the first one to solve #1.

Use the second one to solve #2.