00:01
Okay, so we're given a wave with some characteristics that give us the measurements like 8 .26 and 5 .2 and a frequency of 49 .6.
00:10
And for part a, we're looking for the amplitude.
00:12
Now, amplitude is the distance between the equilibrium position and the top or bottom of the wave.
00:21
So they're actually giving us double the amplitude.
00:23
Let me write this clearly here.
00:26
Double the amplitude is 8 .26.
00:29
We want to know just from.
00:31
The midpoint there to the bottom or the midpoint to the top.
00:34
So if i divide by two on both sides, i'm going to get 4 .13 centimeters for my amplitude.
00:41
So that would be my answer for part a.
00:44
For part b, we want to know the wavelength.
00:45
Now, they give you another measurement on the picture here, and that's this 5 .2 centimeters.
00:52
Now, this is not a full wavelength.
00:53
The wavelength is going to go from crest to crest, and this is our wavelength.
00:59
So the way that i would think about this is they're giving us half the wavelength.
01:04
Half the wavelength is equal to 5 .2 centimeters.
01:09
So we're going to need to multiply by two on both sides, and that's going to give us 10 .4 centimeters for our wavelength...