When your punch punches FAST ENOUGH, air got no time to flow around it, thus creating an air turrent that blows forward.
There you got it.
Now about what speed would be required for that ... 🤷*♀️🐧
When your punch punches FAST ENOUGH, air got no time to flow around it, thus creating an air turrent that blows forward.
There you got it.
Now about what speed would be required for that ... 🤷*♀️🐧
I said that it was insignificant. Air also compresses, so it won't just create a giant tunnel in front of your fist. It'll compress, then disperse in all directions, not just flow around your fist.
But let's play with this scenario (as if my fist was a perfect pump):
My fist is 4cm x 6cm in surface area and my arm length is 1m. That gives my arm a displacement volume of 2400cc assuming I punch air in a straight column and it perfectly displaces all that air in a forward thrust. What does 2.4L of air being suddenly displaced feel like?
Let's use something in real life that has a displacement of 2.4L, like a car engine. A 2.4L (typically 4-6 cylinder engine) will displace its engine capacity after 2 full revolutions. Note that 2.4L engine capacity refers to how much air it naturally aspirates prior to combustion. The exhausted volume is larger since it is heated and expanded.
In other words, the exhaust from your 2.4L engine after 2rpm actually overestimates a single punch's displacement. But let's forget that for a bit and say they're equal.
So then, a 2.4L engine revving at 7000rpm would displace the same amount of air from its exhaust as if you punched at 3500 punches per minute. That's some fast punching.
Now put a brick at the end of that exhaust. Not a large one, a small one will do. Now far does that brick move?
Yeah. Air movement during punching is insignificant.
Last edited by Buffalobiian; Wed, 01-15-2020 at 08:30 AM.
If it's not Isuzu-chan Mii~
Since this is one of the more active threads I'm going to use it a little bit for something else.
I couldn't access this site for like 4-5 days, now it works again all of a sudden
When I viewed the site for the first time in half a week, weird blue artifacts appeared all over for the first 30 seconds - several times.
The #gotwoot irc channel is dead or something? The link in there leads to a really fishy and most likely infected site too.
I'm confused (and a bit scared) - gotwoot.net was literally the only webpage I couldn't visit.
What the heck.
and...
Energy or heat or something.. or simply put, his power. It's probably among the most generic ways to travel mid-air in anime.Are you being serious..?
A jet engine generates thrust by ejecting something in the opposite direction. What was Izuku ejecting..?
On top of that, he's had the image of a flipping lightning bolt ever since he gained that aura ability and I think that this makes it clear that he doesn't just "hover" or fly at will in my book.
Last edited by KrayZ33; Wed, 01-15-2020 at 01:50 PM.
If we could spread the energy put into this posting equally over the forum, gotwoot would be well snd alive!Originally Posted by Buffalobiian
;p
Even if you do, nothing like that happens.
Nuclear bombs (specifically, ones that rely on fission) release large amounts of energy in the form of radiation.
This radiation heats up surrounding structures (such as air), which ends up expanding in rapid amounts.
Heated air expanding rapidly translates to kinetic energy, pumelling anything else in its way as it expands from its epicentre outwards.
The key here is that air blasts from bombs work because you've just rapidly "created" increased volumes of air by superheating it. The heated air has nowhere to go but outwards, which causes destruction. The volume of air you've just created and displaced is huge.
On the other hand, your punch displaces 2400cc of air.
-You don't magically cause explosions from punching.
-You don't create new volume of air to blow around.
-Air doesn't "stand still like a solid" in front of your fist just because you punched really really fast. Not like this.
As for punching "like a nuke", even if your muscles can generate that amount of force, you're not going to transfer that energy to the air. Numbers aside, transfer of energy from punching happens in the following way:
1) muscles provide force to accelerate your fist.
2) Your fist now carries kinetic energy
3) You transfer kinetic energy from your fist when it hits something else and decelerates.
--That ends up being a person/target if you hit.
-------If you hit early on in your swing and "follow through" with more muscles, you're pretty much giving them a push afterwards. General projectile/kinetic energy transfer formulas don't apply here.
--And when you whiff or hit air, it ends up being your own body's tendons and shoulder girdle.
I had some numbers about the velocity and acceleration your fist would end up sustaining if you applied 88 Terajoules of energy to it, which was the blast yield of Nagasaki's bomb (Fat Man), but in the end punching air fails because of force tranfer, not the numbers themselves so I'll spare you guys.
So like...
1) Fists aren't bombs. They don't create massive volumes of air with nowhere to go but out.
2) Fists don't transfer their kinetic energy to air when you whiff.
And as for
I totally enjoy watching shows. I accept that his flying right now is pretty bullshit and get on with it.Blasting off of thin air is something countless anime have done. If you can't get over it, I'm sorry your brain goblins keep you from enjoying things.
It doesn't stop me pointing out that if you believe that flying by kicking really hard at the air has basis in physics - it doesn't.
@Krayz33: the gotwoot IRC client is kind of dead, but the current irc channel is
irc://irc.rizon.net/gw
A few of us loiter there. Not sure why the website looked funny for you.
Last edited by Buffalobiian; Thu, 01-16-2020 at 05:05 AM.
If it's not Isuzu-chan Mii~
This.
To add, I've always complained about the nonsense physics and biology in this show, so the "what about this other absurd thing?" comment doesn't apply to me. Yes, they are all absurd to me and breaks my suspension of disbelief constantly. I still enjoy the other parts of this show though. I also understand people have varying tolerances for suspension of disbelief, and I am particularly sensitive myself.
Peace.
It does in the physics of this show.
His punches shoot wind. Wind strong enough to destroy buildings. The show established this a long time ago. Wind that strong can push someone through the air.
I have no idea why someone would try to measure superpowers with physics though (especially Deku's).
But... isn't the speed important too (not just mass)?
Just imagine what would happen if you punch at the speed of light.
It would basically result in nuclear fusion and nuclear explosions.
Air particles can't move out of the way, pressure rises - boom - explosion
Air is basically no longer "air" since the air molecules won't have time to "move around" your fist, you actually hitting them. At that point, shouldn't air be just like a wall?
Similar to how Water is basically concrete if you hit it fast enough.
edit: basically this! Came across this by googling "air punches"
https://what-if.xkcd.com/1/
since I'm curious now, wouldn't hitting air fast enough result in an explosive release of force/gust of wind when the air starts "expanding" in all directions again?
Or wouldn't hitting air that fast suffice as something you can "hit" and suffer recoil from, or how does that work.
Basically, what will happen if I punch at light speed forward and move my arm backwards at the same speed afterwards?
Last edited by KrayZ33; Thu, 01-16-2020 at 01:00 PM.
@Krayz33.
In baseball experiment you proposed, their example suggests that when you punch that fast, you are actually destroying the very atoms of the air as your fist travels through, causing nuclear fusion and release of radiation in a somewhat similar manner to nuclear explosions.
You ask what would happen if your fist travelled at the speed of light? Well.. ^ like that I guess.
A 25kg arm/fist travelling at the speed of light (say 3x10^8m/s) carries the kinetic energy of 1.2 million Terajoules (compared to 88 TJ of Nagasaki's Fat Man).
So.. yeah, I guess if you packed 13000x the power of a nuke into your punch and reached speeds to destroy atomic atoms you'd displace some air. Note that again, this becomes an exothermic nuclear reaction, not "punching air so hard it moves". The air in fact didn't move - that's the point of punching air so fast.
Don't forget Newton's 3rd law, which means that in order to generate that punch you would have sent a similar amount of energy into the ground. I don't know if that means you'll vaporize the ground, or shift the Earth's orbit or.. something hypothetical that I'm not smart enough to figure out.
Your shoes would be fucked though. I know that much.
Well in my previous car displacement example, I showed what'd happen if your fist was acting like a perfect cylindrical pump and displaced every bit of air it punched at 3500 punches per minute - it would move air, but it wouldn't move a brick.
That's very fast punching. All Might's fight against Nomu used 300+ punches total.
The other examples given here are talking about what'd happen if you punch fast enough to break aerodynamics and destroy the very air you punch.
Sure. No argument there then.
Since physics is about observing phenomena, coming up with rules which simulate and explain them in order to predict future case, then everything that happens in here is fine since it's "real" in this world.
Last edited by Buffalobiian; Thu, 01-16-2020 at 08:30 PM.
If it's not Isuzu-chan Mii~
I also agree with this. The "physics" or physical rules in the show are so flexible and vague it's really hard to say something clearly goes against it. Even then, there are some really questionable things, which everyone in this thread have brought up at one point or another.
Peace.
Episode 77
-------------------
Thoughts, MFauli?
If it's not Isuzu-chan Mii~
It only took 3-4 seasons for a single consequential death. Good.
On the other hand, the worst that the villain group has done so far is ... punishing another villain. We sure Shigaraki isn't a hero actually? 👀
Nah, you just forgot about all the other things.
Which is normal, considering the gaps between the seasons and all that.
Since my memory is rather fresh, since I started watching the whole thing 2-3 months ago, I remember that they sent these Nomu things to wreak havoc in the city (injuring who knows how many civilians) and the training camp arc rather well, where they crippled a pro hero (didn't recover yet), injured several other pro heroes (those were able to recover though) and are responsible for All Might's earlier than early retirement.
Last edited by KrayZ33; Sat, 01-18-2020 at 08:48 AM.
I believe the sand hero was killed as well during this attack, but deaths or lack thereof don't really bother me.
Shigaraki is showing his own growth here, is the important thing. He actually is commanding villains now, including the reluctant Spinner, and executing plans.
Also, he's wearing a cool coat now!
I was expecting them to just use the guy's own cure on him. I guess they're lucky his powers are localized to specific body parts.
I don't like that that cure is still around though...we've already pull the trigger on that particular chekov's gun. I don't need it to continue to be a thing going forward.
78:
Woah, sand guy is dead? Looks like season 3 is where BnHA actually gets villains doing villains things. Hope it keeps up.
Didn't like the random giant villain, though. "oh btw here's a super powerful guy, but we didn't show you because ... this is an anime!"
I don't know why the new OP has so much Earphone Jack, but I ain't complaining!
Dude looks like he's Red Riot's secret brother. Spikey red hair and rocky skin.
The PV to this season did pretty much explain that if you want to find out.
The giant scene was a bit stupid in my opinion. I mean, that thing wasn't exactly sneaking around and they (or more importantly, the observers that spotted the phantom gate guy)didn't see it until it was this close?
Last edited by KrayZ33; Sat, 01-25-2020 at 03:44 PM.
Unless it's going to be a filler arc, no, I don't want to find out.
Well, we don't know what all his powers are yet. Maybe he has camo or can move underground.
80
---
These sure am some low stakes.
Posting Permissions
Reply With Quote
