Define frequency:

the distance from the rest position to a crest or a trough; the more energy, the greater the amplitude

a repeated back-and-forth or up-and-down motion.

the part of a longitudinal wave where the particles are far apart

the number of waves that pass a set point in a certain amount of time

the number of waves that pass a set point in a certain amount of time

Explanation:

Frequency (f) is the number of cycles a wave can complete in one second. The standard unit of frequency is Hertz (Hz).

Mathematically, frequency of a wave is inversely proportional to its period (T)

i.e F = 1/T

the contamination

we are putting to many trash.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.