Ummmmh, okay....? I bet next thing you'll tell me is that you can bend a light beam?????!?!?!?

In all seriousness,

"The concert was held at Foro Sol stadium, a baseball stadium with a distance of 125m from home plate to the centre field wall.

I counted 14 waves in 10 seconds, with about 0.3s between waves, so about 0.41 seconds for a wave to travel the length of the field. Speed of the wave is therefore 305m/s. The speed of sound in air at 2240m is actually 343m/s... so... it's sorta close."

>> ^spaceman:

First, sound waves do not "expand" and second they travel at ~343 at sea level in our particular atmosphere/medium.

well this is the thing , i like marshel arts and all the other sports as a form of dance and way of getting fit , allso they are like a living musum of culture. but allot of the people that practise them ohnistly think of them as a practical wepon , when in modern socity its very rare that you would actualy need to know annything to be in the best servival outcom . nearly always if in a confruntatoinal situatoin your better running away , allso due to the nature of street fighting chances are annyone who actualy has intent to hurt you will have a kniffe or a gun , in which case your fucked.

there is allso a huge difference to knowing basics of self defence and keeping fit and limber , over sumone that trains as if they are going to be a gladeator.

the latter seems like a very unproductive usage of time ( in the sence of doing it for self protectoin) I have nothing against people doing it for enjoyment.

I allso find sport scence quite intresting , and thats what this guys kick techneek realy comes down to , utilising the muscles in the most efficent way to deliver force at a given piont of contact. but its so retardedly simplistic compared to other scencies or other thigns of intrest , yet the guys presenting it teach it as if its some sort of mystical oober magick , exsploiting peoples retarded respect for martail arts that has developed over the yers.

infact one of the things that the japanise ninja sucsesfully did was convince people that they had magic powers and that was a sort of mental wepon that would give them the upper hand in a battel. its amusing that morons are still going allong with it.

In modern life u just need to know how to handle a knife use and look after a gun , and identify potentail situatoins from a distance so you can avoid them or run away. skills such as how to make money , or cook grow capture varouse foods , or be educated are going to be far grator factors in avoiding phisical fights and having good servival in modern life.

>> ^xxovercastxx:

>> ^westy:
so i got this thing that fires metal faster than the speed of sound.

I can almost understand why people repeat this stupid comment in light of self-defense videos, but this is a sport. Nobody talks about how they own a bulldozer when watching football.

>> ^xxovercastxx:

>> ^westy:
so i got this thing that fires metal faster than the speed of sound.

I can almost understand why people repeat this stupid comment in light of self-defense videos, but this is a sport. Nobody talks about how they own a bulldozer when watching football.


I sure as hell fucking do! "Hey Everyone...LOOK at my Fucking Bulldozer!"

>> ^westy:

so i got this thing that fires metal faster than the speed of sound.


I can almost understand why people repeat this stupid comment in light of self-defense videos, but this is a sport. Nobody talks about how they own a bulldozer when watching football.

>> ^westy:

so i got this thing that fires metal faster than the speed of sound.


And that guy would still probably fuck you up 3 times before you'd managed to unholster it... ; )

so i got this thing that fires metal faster than the speed of sound.

Tags for this video have been changed from 'chrome, browser, speed, potato, sound, lightning' to 'chrome, browser, speed, potato, sound, lightning, rube goldberg' - edited by gwiz665

LOL at the 2:17 shot of the conductor, looking rather bored as he casually drives his 50's vintage train at the speed of sound.

When The Dude abides, The Dude abides.

Yes, dc, but rather than "direct mechanical transfer" it's more appropriate to say that the speed of sound is faster through hard soil than air - anywhere from 15 to 40 times as fast. Now that you've asked, I'm tempted to do the math on this video and see where it falls.
>> ^deathcow:
so is the initial boom that preceeds the shockwave direct mechanical transfer through the ground??

I think you're right Westy, I probably overstated what I meant. My real point is that they shouldn't overstate their evidence like this. Pointing out that no other steel structure has collapsed due to fire sounds really dramatic but there's a lot of important reasons that 911 is different. Similarly, establishing that the building fell at near free fall speed again sounds like a damning piece of evidence but there's a lot of good reasons why that would be expected. They don't have to accept the explanations against these pieces of evidence, but they're being disingenuous by not at least mentioning them. The lay person may accept these as much more powerful facts than they really are as a result and that's the bulk of my complaint.

The real reason for my comment is that I'd like to see a video like this done professionally without a lot of whiny finger pointing at the established explanation. It makes it hard to believe you're getting an unbiased account of the facts. If they started the video with a presentation of the accepted explanation in a way that demonstrated their understanding of it and from there presented evidence for a different conclusion then I'd be more likely to take it seriously. They must show that they can see the value in the standard explanation but believe the alternative better accounts for the facts; otherwise they get mired in conspiratorial thinking relying on hidden evidence which can be difficult to take seriously. As it is, I'm only left with a vague feeling that there may be things I should research on my own to make a conclusion but that I can't take anything from this video without a grain of salt.

Sorry for the rant.

The sound delay is about eight and a half seconds, so judging the distance is fairly easy, based on the speed of sound.

8.5~ seconds = just shy of 3 kilometers, or about 1.8 odd miles.


Definitely one massive explosion, and a great many potential road-side bombs curtailed.

^ yup, if you stayed in front of the shockwave you would never hear it. (so you'd be travelling at or faster than the speed of sound (Which would indeed be a fast car as it's 340.29 meters/s))

And the changing sound pitch you would hear if you were traveling away or towards the explosion would be an example of Doppler Shift

Why does this say 1130 ft/s like that is (a) the speed of sound and (b) we didn't know the atmoshperic conditions on that day?

It was cold and probably less than 100ft above sea level. You could probably get the barometric stuff. It should have been 5% faster based on how cold it was.

>> ^Sylvester_Ink:
As Payback already pointed out, it's definitely not supersonic.
Also, one of the characteristics of a sonic boom is the loud CRACK that you get as it passes by. This is loud enough to deafen people and shatter windows for at least 100 meters around.


Um.. the sonic boom I thought was at the moment you exceed speed of sound when you stack up the soundwaves.

Do you think all planes flying at supersonic CONSTANTLY emit a sonic boom everywhere they fly? Wouldn't that make fighter plane detection pretty easy?

WHAT.... A... STUPID.... CUNT.....

WORDS.... TRAVEL.... AT... THE.... SPEED.... OF... SOUND....

SHE... PROBABLY... TALKS.... TO... FOREIGNERS.... IN.. A... LOUD... SLOW... VOICE....