00:01
Here we have length l is equal to 2 .50 meter, mn is equal to 49 kg, mn plus 1 is equal to 36 kg.
00:23
So in part a, let us say n is the number of nodes due to the 49 kg, and n plus 1 will be number of nodes due to 30 kg, and n plus 1 will be number of nodes due to 30.
00:40
So for standing waves, we know that lambda is equal to 2l divided by n and velocity v.
00:57
Square root of tension in the row divided by mu.
01:06
And we know that the frequency of the wave is equal to v divided by lambda.
01:12
So frequency f is equal to n divided by 2l into square root.
01:18
Of t divided by me.
01:25
Also, f is equal to n plus 1 divided by 2l into square root of t n plus 1 divided by me.
01:38
This is equation number 1 and this is equation number 2.
01:43
By taking the ratio, we get n divided by n plus 1 is equal to square root of t n plus 1 divided by t n plus 1 divided by t n.
01:56
So this is equal to square root of tension is equal to m into g.
02:02
So 36 into g divided by 49 into g.
02:08
So this is equal to 6 by 7.
02:12
By solving we get n is equal to 6...