How are wavelength and frequency of a wave related?

The product of

           (wavelength) x (frequency)

is always the same number.  It's the speed of the wave.

So if either number changes, the other will always change by the
same factor in the opposite direction, in order to keep their product
constant.

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

Sound energy is produced when an object vibrates. examples are 1- a balloon popping2-a whistle3- a waterfall