Physics sound

What is the first step to calculate l from this formula: 2π√(l/g)=T

Divide both sides by 2π

What is the first step to calculate g from this formula: 2π√(l/g)=T

Raise both sides to the power of 2

Sound

Our perception of a mechanical wave moving throughout a gas/liquid/solid

Mechanical wave

Mechanical oscillation propagating throughout space

Oscillation

Repetitive movement, vibration; 1 oscillation is 4 amplitudes

Pendulums

Small weights hung on a string

What are 3 quantities we use to describe oscillation?

Amplitude, Period, frequency

Amplitude

(x_m, m) maximum deviation of the body from the equilibrium position

Period

(T, s) duration of a swing (1 full oscillation)

Frequency

(f, Hz) number of oscillations in one second

Period formulas

T=t/n; 2π√l/g

Frequency formulas

f=n/t; f=1/T