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Chemistry: 3.8 Density, Cont. 46 Views
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Description:
Ever wondered how dense you are? No, we're not leading you into some cruel joke. We mean literally. Today's video will show you how density can be calculated. We're talking mass and volume here, not intelligence, we promise.
Transcript
- 00:04
Wanda the wondrous is about to perform her greatest escape [Wanda preparing to perform magic trick]
- 00:07
trick ever not only is she going to get out of her straight jacket while totally
- 00:11
submerged in the tank of water but while she's in there she's going to figure out
- 00:15
her own body density it should be enough to thrill fans of magic and science
- 00:20
alike well after being dropped into the tank Wanda has to work fast first she [Wanda dropped into a tank of water]
Full Transcript
- 00:25
needs to dislocate her right shoulder so she can maneuver her arm into a position [Wanda dislocates her right shoulder]
- 00:30
where she'll be able to reach the first few buckles, that's the easy
- 00:34
part and now for the density calculation she knows that the tank was filled to
- 00:38
the five thousand liter mark before she entered the picture now that Wanda is [Wanda suspended in tank of water]
- 00:42
totally submerged she looks up and notices that the water's risen to the
- 00:47
5050 liter mark well using some pretty advanced calculus, Wanda realizes that [Person using calculator]
- 00:52
because of displacement her body must have a volume of 50 litres because like
- 00:58
5050 - 5000 in California anyway equals 50 litres and already she's halfway
- 01:03
there now she has to think back to earlier that morning when she stepped on a [Wanda steps on weighing scale]
- 01:08
scale to determine her mass well she weighed 60 kilograms and next because
- 01:14
the formula for density is mass divided by volume we can take Wandas mass 60
- 01:19
kilogram and divide it by her volume 50 liters to get 1.2 kilograms per liter
- 01:26
and that's the measure of Wanda's body density boom done she comes up with this
- 01:31
answer just before freeing himself from her bonds and kicking her way to the [Wanda jumps out of tank of water]
- 01:34
surface the audience is impressed by her aquatic escape ability but not nearly as
- 01:38
impressed as they are by her willingness to voluntarily do math... now that's [Wanda points to her body density on chalkboard]
- 01:43
magical
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