Calc Yu Yu Hakusho Feats - Artifacts of Darkness Collection

Goki's Physical Might and Durability

In which Goki snaps a pair of trees

So, here's the first feat and second feat

Now scaling


Yusuke Half Arm Span = 669 pixels
Tree Diameter = 436 pixels
Tree Destruction Height = 769 pixels

Tree Diameter/Yusuke Half Arm Span = 0.652
Tree Destruction Height = 1.149

Yusuke Half Arm Span = 0.85 meters
Tree Diameter = 0.554 meters
Tree Destruction Height = 0.977 meters

Volume = PIr^2*H

r = Tree Diameter/2
H = Tree Destruction Height

Tree Destruction Volume = 0.235 m^3

8.34 j/cc

This pair of videos actually seems to corroborate our values for those staring incredulously at the numbers wood is deriving (mind you, the direction of compression is different, so the comparison isn't exactly 1:1, but eh)

Goki's Physical Might = 1,959,900 joules or 468.427 grams

Next one


Yusuke Half Armspan = 286 pixels
Tree Diameter = 142 pixels
Tree Damage Height = 231 pixels
Goki Height = 1012 pixels
Goki Arm = 583 pixels
Goki Torso = 516 pixels

Tree Diameter/Yusuke Half Armspan = 0.497
Tree Damage Height/Yusuke Half Armspan = 0.808
Goki Height/Yusuke Half Armspan = 3.538
Goki Arm/Yusuke Half Armspan = 2.038
Goki Torso/Yusuke Half Armspan = 1.804

Yusuke Half Armspan = 0.85 meters
Tree Diameter = 0.422 meters
Tree Damage Height = 0.687 meters
Goki Height = 3.007 meters
Goki Arm = 1.723 meters
Goki Torso = 1.533 meters

Cylinder Volume = PIr^2*H

r = Tree Diameter/2
H = Tree Damage Height

Tree Damage Volume = 0.096 m^3

8.34 j/cc

Goki's Physical Might = 800,640 joules or 191.358 grams

So at least he's consistent

Notable being Yusuke does survive something of a beating from Goki in his second fight (only Goki's two hits to land in the first fight are arguably strikes Yusuke partially dodged)

Could have looked at Goki smacking Yusuke with part of a tree, but getting a KE for that is kind of impossible without assuming Goki's arm speed.

Goki leaping requires knowing how far the kid ran to even try to get something accurate.

However?

Goki has steel tough skin, thus I'm be using square cube law to get his skin's volume and then applying our fracture value for steel to that *shrugs*

So let's try it.

So, Square-Cube Law and such fun shit

So, apparently the average adult has about 3.6 kilograms of skin. 1.7 meters as an average height will thus be used for the theoretical human sized Goki.

I didn't derive Goki's full height (only about 3.007 meters of it to the bottom of his calf), but I got most of it and that will be what is represented here.

Just divide the mass of skin by around water density (1,000 kg/m^3) to get the volume (not exact, but I can't find a skin density in kg/m^3).

Goki's Skin Volume = 0.0036(3.007/1.7)^3 = 0.02 m^3

208 j/cc

Energy Needed to Harm Goki's Steel Tough Skin = 4,160,000 joules or 994.264 grams

That's... fairly in line with his feats actually

Either way, Kurama and Hiei are beyond Goki so anything he did here they can do better.

Next?

Artifacts of Darkness Yusuke's Reigan Speed

The Feat

Now, you're probably asking... how?

Notice, Yusuke's basically shot the Reigan through Goki's mouth, through his spinal cord or the nerves connected to it, and out the other side. Ergo, the nerve signals that travel to his brain that would keep his ass standing, his arms up in the air, essentially anything keeping Goki from falling over? Those signals have effectively been cut off.

Ergo, however fast those nerve signals would be traveling determine how fast the Reigan is relative to how far they have to travel.


Image 1

Goki Arm = 475 pixels
Reigan Travel = 1423 pixels

Reigan Travel/Goki Arm = 2.996

Reigan Travel = 5.162 meters

Image 2

Goki Torso = 1270 pixels
Nerve Impulse Travel (Green Line) = 902 pixels
Nerve Impulse Travel (Blue Line) = 826 pixels

Nerve Impulse Travel (Green Line)/Goki Torso = 0.71
Nerve Impulse Travel (Green Line)/Goki Torso = 0.65

Nerve Impulse Travel (Green Line) = 1.088 meters
Nerve Impulse Travel (Blue Line) = 0.996 meters

Reigan Travel/Nerve Impulse Travel (Green Line) = 4.744
Reigan Travel/Nerve Impulse Travel (Blue Line) = 5.183

For nerve speeds? Look here. The appropriate nerves would probably be the ones listed in the top most part of the chart. Someone more knowledgeable on anatomy can correct me though.

Low End Muscle Nerve Speed = 80 m/s
High End Muscle Nerve Speed = 120 m/s

Artifacts of Darkness Yusuke's Reigan Speed (Green Line; Low End) = 379.52 m/s or mach 1.115
Artifacts of Darkness Yusuke's Reigan Speed (Blue Line; Low End) = 414.64 m/s or mach 1.218

Artifacts of Darkness Yusuke's Reigan Speed (Green Line; High End) = 569.28 m/s or mach 1.673
Artifacts of Darkness Yusuke's Reigan Speed (Blue Line; High End) = 621.96 m/s or mach 1.828

Nothing of particular note happens in the Hiei fight other than Yusuke's Reigan cooking his back enough to cause it to burn/smoke (I honestly don't know how to do that... maybe raising body temperature by some number of degrees as a low end?) and Hiei dodging it (hence why looking at the speed feat with Goki would be worth something)

At least Yusuke by Hiei's fight scales to Kurama's feat from Two Shot, the prequel. He's arguably not too much slower than Jagan Form Hiei that dodged his Reigan either, able to throw a punch in the time it took Hiei to get behind him would be little more than 2 times slower really.

Next?

King Enma's Wrath

Here's the raw

Here's the scanlation

Here's the Viz

Here's an Earthquake Magnitude calculator (the number we'll be using is for the Moment Magnitude Scale)

And here's my original poke at this

Essentially, due to past precedent of observing his father's anger and how it effects Earth, Koenma fears the kind of collateral that'll occur in the world of the living should Enma learn of and become pissed that his son was doing a shit enough job a trio of D Class demons could waltz into their treasury and steal valuable artifacts.

Now, what's doing?

Let's focus on the Great Kanto Earthquake for a start as a low end.

I don't advocate the low end, as the Great Kanto Earthquake didn't cause Mount Fuji to erupt, but let's start there as the basement

Wikipedia lists 3 different moment magnitude values at 7.9, 8.0, and 8.2 (the 8.0 and 8.2 being from scholarly articles... shame they're in fucking Japanese, but you can at least ctrl+F 8.0 and 8.2 respectively in each to find their mention)

The 7.9 MMS yields 8.729714 * 10^20 joules or 208.645 gigatons

The 8.0 MMS yields 1.233105 * 10^21 joules or 294.719 gigatons

The 8.2 MMS yields 2.460368 * 10^21 joules or 588.042 gigatons

Like I said though, Mount Fuji didn't erupt, so this would be the low end ignoring the full context.

So, what would it take to theoretically cause the dormant Fuji to Erupt?
The Hoei Earthquake of 1707 is suggested to have potentially caused Fuji to erupt... 49 days after the earthquake occurred.

So still seems kind of like a low end given that's something of a lack of immediate urgency.

Hoei's MMS ranges from 8.7 to a 9.3 apparently. So there seems to be a toss up between it and the Tohoku Earthquake as japan's worst I suppose *shrugs*

Using the calculator above?

The 8.7 MMS yields 1.383566 * 10^22 joules or 3.307 teratons

The 9.3 MMS yields 1.099006 * 10^23 joules or 26.267 teratons

Either figure could be justified

And Enma's basically just an A Class in terms of power.

So that's fun