Question

If the number of crests that pass a point in a given time increases, what has increased?

intensity


wavelength


frequency


amplitude

Answer 1

I messed up on my first answer, I looked at the question wrong thinking that it said decreased not increased. And, indeed, frequency is correct. `:D

Step-by-step explanation:

Hope this helps!

Answer 2

The frequency increasing makes the crests pass more quickly.  Frequency is a count of how many times per second an event occurs.  In waves, this event is the passing of an entire cycle.  Once the cycle has passed, the wave repeats.  The faster the wave repeats, the higher the frequency.  For this reason, frequency has units of hertz, Hz.  The unit of hertz is 1/s or "per second"