how to calculate frequency and period?

Question

science hw. formulas are T(seconds)=1/f(frequency/hertz) is formula for period for frequncy formula is f(frequency hertz)=1/T(period seconds)
questions
1. a string vibrates at a frequency of 20 Hz.What is the period?
2. A swing has a period of 10 sec. what is it Frequency?
plese tell me how you did it and answer thanks alot

Answer 1

Period and frequency are simply the inverse of the other.



T=1/f or f=1/T



1. Frequency = 20 hz. The period is thus 0.05 seconds.



2. Period = 10 seconds. The frequency is thus 0.1 hz.

Answer 2

Frequency is inverse of period, and vice vera.

1. Period is 50mS

2. Frequency is 0.1 hz.

Answer 3

T (era of wave) = a million / F (frequency) 7 mm = 0.7 cm (significant, distinctive values in any different case) velocity = Frequency x Lambda (wavelength) Frequency = Lambda / velocity F= 0.7 / 60 F= 0.012 Hz T = a million / 0.012 T = 80 3. 3 seconds