00:02
Hi there.
00:03
In this question, we are trying to determine the density of this metal cylinder.
00:09
And the formula for density that we're going to need to use is mass divided by volume.
00:18
Density is a derived unit.
00:20
We need to do a calculation to obtain a density.
00:24
Well, we need to do this stepwise.
00:27
And the first step wants us to determine the volume.
00:29
The mass is given to us, but the volume is determined by water displays.
00:35
And what that means is you have a graduated cylinder that has some water in it.
00:46
Specifically, we are told that the water, if we measure it from the bottom of the meniscus, the water has a volume of 15 .4 milliliters.
01:01
And that is the water only.
01:05
Then we add the cylinder.
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So we place the metal cylinder here, and we notice that the volume of the water.
01:15
Water goes up.
01:18
And it's going to go up an amount that is equal to the volume of the cylinder.
01:21
The new volume is now 17 .2 milliliters.
01:29
So that is the water plus the metal cylinder...