A speed cause it would slow down meeting eachother
The period T is time it takes for one complete cycle or from "trough to trough" so the reverse is trough per sec = 1/T = frequency
I changed my undershorts. The elastic on the old ones I put on that day was deteriorated, and it completely failed when I dripped lab coffee on it, causing falldown.
Answer:
1995 and 2000 , 4 trillions
Explanation:
A would be the wavelength, C would be a crest, D would be the amplitude, leaving B which is the trough.
