00:01
Hi there, so for this problem we have a 2 meters long string, so the length l is given 2 meters and it has a mass, so let's call this the mass of the string, ms, and that is a plus 1 .5 grams.
00:22
And we are also told that b plus 25 grams mass is attached.
00:31
Let's call this just simply the mass m and that is equal to b plus 25 grams.
00:40
Mass that is attached to the string and hung over a pulley.
00:46
Now the end of the string is then vibrated at a frequency.
00:50
So the frequency is also given that frequency is 125 plus c.
00:58
And this in hearse.
01:01
We need to find the wavelength.
01:03
For the wave generated.
01:05
Now, you need to give your answer in centimeters and with three significant figures.
01:12
Now, we are given that a is equal to 21.
01:18
B is equal to 399.
01:26
And c is also given, and that is just simply 9.
01:31
Now, with these values, we can determine the mass of the string because that is going to be 21 plus 1 .5, so that will give us the value of 22 .5 grams.
01:45
That's the mass of the string.
01:47
Now, the mass of the block that is attached to this string, so that will be the value given for b, which is 399 plus 25, so that will give us a value of 400.
02:04
124 grams.
02:07
And the other value that we are given is the frequency, though, so that will be 125 plus c, which is 9.
02:15
So that will give us a value of 134 hertz.
02:21
So these are the values that we have in here.
02:24
And now what we need to obtain is the wavelength.
02:30
And to obtain that, we know that that the wavelength is related with the speed in the stream because we know that the speed is equal to the frequency times the wavelength.
02:43
Now, since we want to obtain the wavelength, we just need to simply divide the speed in the, in this stream divided by the frequency that we are given...