Calc Request

[VegetaFan756]

an explosion is at the center and bottom of a facility that is 100km squared. The explosion utterly torn apart several hardened steel doors, which google tells me take a little under 1000 tons of tnt, and this is throughout the whole facility.
so how many tons of TNT is required to destroy something that required 1000 tons of TNT, from nearly 100km away?

 

[LaserPrecision]

Under the assertion that it takes 1000 Tons of TNT to completely destroy a steel door (It would need to be a PRETTY big door) from 100 kilometers away (100 km squared doesn't mean it's 100 km away, but for the sake of the question, I'll answer anyway), we can find the strength of the blast's origin using Inverse Square Law.

Since the blast takes place on the ground, we'll use the surface area of a hemisphere.

2*3.14159*50000^2 = 15707950000 m^2

What you didn't give is the dimensions of the door, so I'll make assumptions. For a steel door to take 1000 tons of TNT (A Kiloton) to completely destroy, it must be pretty big to require that kind of power. So I'll assume a length of 3 meters, a width of 1, and a height of 0.5 meters which would be quite a hefty steel door.

This gives us a surface area of 10 m^2. Honestly even THIS door wouldn't withstand close to 1000 Tons of TNT as far as I know, but it's already pretty tanky, so I don't want to inflate the Door's size TOO much.

Inverse square formula is Surface Area of Explosion/Surface Area of Object*Energy required to break object.

15707950000/10*1000 = 1.5 Teratons of TNT (Small Country level).

The result would likely be a couple of tiers lower had I taken the time to calculate the volume of the door to require exactly 1000 Tons of TNT to violently shatter it, but I don't have the time for that right now.

 

[It_is_i_wyatt]

yeah i highly doubt this door would require a kiloton to blow down, unless its utterly massive

 

[Arceus0x]

yeah i highly doubt this door would require a kiloton to blow down, unless its utterly massive

i mean, depends on the destruction method

 

[Arceus0x]

when it comes to the destruction of an steel door of the size 90*4*200 in cm

fragmentation 14976000 joules 9-B
vfrag 40932000 joules 9-A
pulverization 72000000 9-A
atomization 4285918800 or ~1 ton of tnt 8-C
sub-atomization 4.826448e+17 joules or 115354875.7 tons of tnt or 7-A

 

[LaserPrecision]

While it's true that things like atomization and sub-atomization would yield very impressive results, based on the method of destruction described 'tore apart several hardened steel doors' I imagine it's violent fragmentation at most.

You'd need an exceedingly large door or several moderately large doors to require 1000 tons of tnt to only violently fragment them.

 

[It_is_i_wyatt]

can we get more specifics of the feat

 

[VegetaFan756]

I have realized that it may be inapplicable since of the way the explosion works...
I was referring to the Resonance Cascade from Half-Life, I am trying to get an upgrade for Gordon Freeman surviving the blunt of it, but I don’t know if it can work.

 

[Arceus0x]

seems wonk

 

[It_is_i_wyatt]

can i see a video of the feat

 

[Diamond_Drone]

can i see a video of the feat

can we get more specifics of the feat

Pretty sure This is what he's referring to. It does cause an Explosion that fills a Room with it's beam, but it's the only "Explosion" thing about it (and probably not even the main point the guy was trying to make).

It did also make Portals that can cause damage to the Environment, there is a possibility of it destroying a steel bridge (but unseen) here or these collapsed Pipes and Debris (Also unseen). Both of these happen at 20-50m (Pretty decent overview here), while the Area of the Facility is somewhere around 4000m^2 or WAY less than 100km^2 (The Diagonal is at least 300ft or 91.44m)

The only notable feat is the actual Explosion by the Beam (which Gordon actually has to bypass, though it seems to have weakened), meaning the Destruction caused by Portals is irrelevant (That situation is never encountered in a way that causes actual harm to Gordon). Though I doubt it's of any use as a feat.

As far as I'm aware, there are no steel doors actually destroyed by the "Feat starter".