00:01
And here, this question, you look at two little questions.
00:02
You ask you to the uncertainty of quantity when there's some uncertainty, it's available.
00:10
For example, first one is about kinetic energy e.
00:13
So uncertainty is what we look at here.
00:17
Right? so the first question we're looking at actually is the kinetic energy, which let me see is an e equals mv squared over two, right? now imagine you have some uncertainty in the mass, which is data m.
00:32
And you have some velocity, uncertain, which is data v.
00:36
And what's uncertain in data e, right? so the data e, of course, is simply given by, you just demonstrate this expression.
00:44
You will get just a v squared over two times data m plus obviously v times m data v.
00:53
So you plug in the data m and data v into this operation...