Uploaded March 2021 | Updated September 2026, 1 week ago
Last time, we extended our Law of Relative Density to include vector notation:
youtu.be/A2tqLZNGiHY
Now that we've got an equation to describe Relative Density, let's break that down an really look at what it says mathematically.
jump ahead:
0:18 Review the Law of Relative Density
2:26 Math is a language... a very precise language
4:48 Drawing "down" on an X-Y axis, and writing that mathematically
7:18 Looking at the k in the equation
8:48 Looking at the Relative Density part
10:23 Looking at the Vo in the equation
10:58 Plug in the numbers for the stone we measured in Science 4 Skeptics #2
13:05 Let's combine the units
14:09 Multiply a vector times a scalar (multiply that k vector into the equation)
15:04 Draw the force vector onto our X-Y axis
15:49 This matched the measurement we took in the kitchen
16:16 Wrap-Up
Last time, we extended our Law of Relative Density to include vector notation:
youtu.be/A2tqLZNGiHY
Now that we've got an equation to describe Relative Density, let's break that down an really look at what it says mathematically.
jump ahead:
0:18 Review the Law of Relative Density
2:26 Math is a language... a very precise language
4:48 Drawing "down" on an X-Y axis, and writing that mathematically
7:18 Looking at the k in the equation
8:48 Looking at the Relative Density part
10:23 Looking at the Vo in the equation
10:58 Plug in the numbers for the stone we measured in Science 4 Skeptics #2
13:05 Let's combine the units
14:09 Multiply a vector times a scalar (multiply that k vector into the equation)
15:04 Draw the force vector onto our X-Y axis
15:49 This matched the measurement we took in the kitchen
16:16 Wrap-Up
