0:00
Hello.
00:02
So we're going to need some constants.
00:03
The first one is going to be the coefficient of linear expansion of brass.
00:08
That's 1 .9 times 10 to the negative 5 per degrees celsius.
00:17
The germ modulus of brass is 9 to the 10 pascal.
00:27
So we're going to be using the linear expansion formula.
00:30
So the change in l, b.
00:32
By alpha times the initial length and it's changing temperature.
00:39
So that's going to be 1 .9 times 10 to the negative 5.
00:46
The emission length is 1 .85.
00:52
Changing temperature is 120 minus 10.
00:56
The change in length is going to be 4 .07 times 10 to the minus 3 meters.
01:06
Okay, so that's the change of length.
01:08
We are not done.
01:08
We need a force.
01:10
We're going to get them from the your modulus formula but before that let's get the area okay so here the cross -sectional area is secular this is going to be using pi r squared which is also pi d squared over four because we have the diameter we're going to have pi times the diameter 0 .016 squared...