00:03
All right, welcome back for this problem.
00:06
We are going to be finding the number of souls in a hummingbird and in a human.
00:10
And we're going to do this in a roundabout way, just so that we can get some practice, finding with, familiar with using orders of magnitude and such.
00:23
So to start, we are given in your textbook that the mass of a bacteria, the bacterium is 1 times 10 to the negative 15.
00:34
Kilograms.
00:39
So that is the mass of a bacterium.
00:44
All right.
00:45
And this average size, mass of a cell of a hummingbird or human is about 10 times that size.
00:52
So if we do 10 to the negative 15 kilograms, we're going to multiply that by 10 to the 1.
00:59
So 10 times that size.
01:01
We can add the exponents right there.
01:03
So negative 15 plus one, that is going to give us 10 to the negative 14 kilograms.
01:09
And that is the average mass of a cell.
01:14
Average cell mass.
01:18
All right.
01:20
So the mass of a hummingbird, i'll just write mass hummingbird is 10 to the negative, oops, 10 to the negative 2 kilograms.
01:33
And all right...