00:01
In this problem on the topic of waves and sound, we are given the tension in a string and its linear density.
00:06
We are then told that a wave on the string travels in the minus x direction with a given amplitude and frequency.
00:14
We want to calculate the speed of the wave as well as its wavelength and then write down a mathematical expression for the wave.
00:23
So we know that the speed of the wave on a string is given by the following equation.
00:29
The speed v is equal to the square.
00:31
Of the tension of the string divided by the mass per unit length of the string.
00:41
And this is equal to the square root of, we are given these values, so the tension, we won't call it t, we'll call it f.
00:54
So the tension f over the mass per unit length, the tension is given to be 15 new, and the mass per unit length, 0 .85 kilograms per meter.
01:07
Or the linear density...