00:01
All right, so here we have problem 45 from chapter 9.
00:06
How much pressure is needed to compress the volume of an iron block by 0 .10 %? express your answer in nons per meter squared and compared to atmospheric pressure, which is 1 .0 times 10 to the 5 newts per meter squared.
00:23
Now, if we want to compress the volume of the iron block by a tenth, well, a hundredth of a tenth percent.
00:33
Now i should say, let's say the 0 .10%, right? so we want to take this and convert it to a number we can use.
00:42
So we know that when we multiply a ratio by 100, we can get the percent out of it.
00:48
So we should divide the percentage by 100 to get the number out.
00:54
That's for later anyway.
00:57
But here we're going to be using this equation, which relates volume to pressure via the bulk modulus.
01:05
And this equation can be found from, oh, i still have the eraser on...