If y = 0.02 sin (30x – 200t) (si units), the frequency of the wave is

31.831 Hz.

Explanation:

Given:

The vertical displacement of a wave is given in generalized form as

where,

On comparing the generalized equation with the given equation of the displacement of the wave, we get,

therefore,

It is the required frequency of the wave.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid