Pretty impressive, right? He simply used the pressure of the air from his thrusts to break the stone. This means he was thrusting that sword really quickly to send them pretty much as bullets to break the rock. Now, there's no such thing as an air cutter, but I can approximate the speed at which the air was going using a water cutter.
What's my justification for using a water jet cutter?
A) The air as a result from the thrust has around the same cross-sectional area as the jet from a water cutter. So the pressures they would need to exert break the substance would be the same.
On the same page, the water is stated to be between 20000 psi to 55000 psi. I'll take a mid-end of 37500 psi which is 2.59e8 Pa.
And finally, the water density is around 1000 kg/m^3.
Meanwhile, the air that Kuno shot forward was at an atmospheric pressure of 101325 Pa and a density of 1.2 kg/m^3.
Let's use the Bernoulli's equation to approximate the velocity of the air to do the same amount of specific work as a water cutter. I neglected work done because there is no work being done on both fluids when they strike a surface, I neglect friction because it's a pain and would lower the velocity value anyhow since the air had to travel more distance so it's an underestimation, and finally, I neglect change of altitude since it's a negligent value here.
v^2/2+P/p = constant (for them to do the same amount of specific work)
(1020)^2/2+2.59e8/1000 = 779200 J/kg
Now, the water cutter is stated, on the same page, to be able to cut around 4 inches deep, which is about 10 cm.
I'll use the middle for the calculation because I'm not sure if Kuno penetrated the base. So 0.724/0.10 = 7.24. Kuno had to exert 7.24 times more energy to penetrate the monument.
v^2/2+101325/1.2 = (779200*7.24) v = 3333.76 m/s = Mach 9.72
So the bullets alone must have been that speed. Considering the loss of energy that occurred, the friction the air experienced during travel, and other factors, it wouldn't surprise to see an even higher speed for Kuno himself. Naturally, this scales to Ranma as well who dodged them. Oh, and this guy is fodder in that verse. And this was early on in the story.
Air strikes: Mach 14.04 = HYPERSONIC level Kuno's Thrusts: At least HYPERSONIC level, probably HYPERSONIC+ level Ranma dodging: At least HYPERSONIC level, probably HYPERSONIC+ level
Eva01 Pretty sure I did everything right. The only thing is that I estimated the width of the stone, but considering it's the type that has a sign on it, I think my estimate is reasonable... actually it might be higher than my estimate.
"Let's use the Bernoulli's equation to approximate the velocity of the air to do the same amount of specific work as a water cutter. I neglected work done because there is no work being done on both fluids when they strike a surface, I neglect friction because it's a pain and would lower the velocity value anyhow since the air had to travel more distance so it's an underestimation, and finally, I neglect change of altitude since it's a negligent value here."
Eva01, I meant that neglecting the friction would lower the end velocity, so it would result in an underestimation.
And I went back to reread it... and let's say the thing is inconsistent. The pillar is more than double Akane's height in one panel and in the other, it's Akane's height. I mean, it's supposed to be one that holds a sign like:
The end result wouldn't change by much, maybe like two machs if reduced by a half a meter.
тиваненк The monument isn't on that page though, are you sure it doesn't appear anywhere else? Also, if you're positive that the sign on the monument is the same as the one on that wall, just measure its width and take that as your minimum thickness.
Eva01, I eyeballed it, considering that Akane is standing behind the monument and she looks fairly small in comparison to it. And she is around a 1.65 m in height I believe. So the width of the monument (which Kuno had to penetrate fully for it to crumble like that) is somewhere around 1.20 m and 1.50 m I believe.
тиваненк Well, that's good enough for me. You could measure it going by the height of average Japanese female students, but the end result won't be too different anyway, a difference of 1 or 2 machs isn't worthwhile.
Master Menos: Finally got out of the fast food job. It was a graceful exit, but to be honest, I'll miss some of those guys. Got a sprained ankle from it since September, so I'll finally focus on healing that back at the family home.
Feb 10, 2020 3:53:27 GMT
HungryWorld: Well if anyone remembers what happened to Pingu in the City, with it being joke 10/10 scored on MAL just to get it into the top 10 anime... well now is Ishuzoku Reviewers' turn. Seems that in response to Funimation's cancel people boosted the score hard.
Feb 11, 2020 2:11:38 GMT
Taka: What? That sounds so weird.
Feb 11, 2020 5:36:23 GMT
Master Menos: It's damn awesome to be honest. It shot to 1st Place!
Feb 11, 2020 6:31:08 GMT
Dream: On the subject of MAL, it looks like the admin are planning to tweak their scoring system for titles to reduce the likelihood of voters artificially inflating the ranking of certain titles.
Feb 13, 2020 22:47:26 GMT
Master Menos: My V-Day present will be belated this year because I "Had some trouble with ol' Johnny." (That's your hint.)
Feb 15, 2020 4:17:13 GMT
Dream: The joys of adulthood. Joking aside, plan to at least attempt to wrap up Gankutsuou sometime early to mid next week so I can get done with my Funi voted titles. Afterward, not doing any more voting for a while considering how long this had been taking.
Feb 15, 2020 16:50:30 GMT
Dream: Done with Gankutsuou. Will be working to get a review up for it by sometime tonight.
Feb 16, 2020 20:57:26 GMT
Taka: Great job, Dream! I should do some reviews, too.
Feb 17, 2020 5:24:39 GMT
Dream: Looks like MAL's currently down due to the site getting hit by a major denial-of-service attack, just as a heads up.
Feb 18, 2020 17:55:23 GMT
Taka: I added 2 polls tonight. Also, I wonder why MAL was down. Crunchyroll also had it, too.
Feb 20, 2020 4:05:24 GMT
Dream: Not sure about Crunchyroll. For MAL, the DoS attacks may have been retaliation by those who dabbled into manipulating the site's scoring system for certain anime titles. The admin on MAL announced they would be overhauling the system to prevent said...
Feb 20, 2020 13:42:15 GMT
Dream: ...manipulation last week.
Feb 20, 2020 13:42:45 GMT