00:01
Hi everyone in this question we are going to calculate the tension musty have just in 15 cm long as strand of silk so they have given the diameter of the silk which is d equal to 0 .002 millimeter we can write it as meter which is 0 .002 times 10 to the power minus 3 meter and density of the silk so we are i denote it capital d, which is the density of the silk.
00:37
This is 1 ,300 kilogram per meter cube.
00:45
And then resonance frequency, which is f equal to 130 hertz.
00:53
And they given the length of the spider, l, which is equal to 15 centimeter long.
00:59
So we can write it as meter, which is 15 times 10 to the power minus 2 meter.
01:04
So, expression for the linear moss density is given by, so linear moss density mu which is equal to row a.
01:18
So we can write it as row a which we know pi or square.
01:25
Otherwise they given that by d squared divided by 2.
01:30
So d by 2 the whole square can write it as and substitute the value and we get the the new value which is mu equal to row.
01:45
This is the density.
01:46
You can write it as row also.
01:50
Density symbol, row.
01:56
The 1 ,300 multiply with pi times this is 0 .002.
02:14
So multiply with 10 power minus 3 divided by to the whole square...
