Comments on: Episode 68: Anti-Gravity Device

By: varnika

varnika — Thu, 19 Apr 2012 00:44:34 +0000

ok so what is the price on this? can you take notes with it like an ordinary aenoptd using the stylus? i wanted to get an ipad for notes and eboks for college but they are so expensive

By: Himanshu

Himanshu — Tue, 17 Apr 2012 06:49:47 +0000

i’ve been thinking about byunig one, but one main reason would be to check my evony account. could you try loading it please, its a flash browser game i would like to know if or how it runs. evony.com it would be most appreciated.

By: Romario

Romario — Mon, 16 Apr 2012 17:53:08 +0000

谢谢李老师。可能是我理解狭义了，WW的原始论文（Physics Letters B, Volume 96, Issues 1-2 , 20 October 1980, Pages 59-62）摘要是这样的：We show that in all theories with a Lorentz-covariant enegry-momentum tensor, such as all known renormalizable quantum field theories, composite as well as elementary massless particles with j > 1 are forbidden. Also, in all theories with a Lorentz-covariant conserved current, such as renormalizable theories with a symmetry that commutes with all local symmetries, there cannot exist composite or elementary particles with nonvanishing values of the corresponding charge and j > 1/2.其中such as 的使用，或许表明他们的结论不仅仅适用于可重整理论。但是，没有可重整这个限制，如果说质量为零、自旋为2的粒子不存在，岂不是直接跟引力场的存在相矛盾（除非原因就在于广义相对论中没有整体守恒的能动张量）？我很早就注意到他们的这篇论文，只是一直不知道这就是大名鼎鼎的WW定理。那时我试图给出任意自旋粒子的类Dirac方程，后来发现前人早已经做过这类尝试。

By: David

David — Mon, 20 Feb 2012 04:00:27 +0000

J’ai la solution Anti-gravité …

By: Otto

Otto — Mon, 12 Dec 2011 16:42:25 +0000

In the episode, they claimed there was no thrust generated in vacuum. However, the only thing proved is that it didn’t generate enough thrust to overcome the weight of the craft (5-10 grams?)

By: Gerry

Gerry — Mon, 12 Dec 2011 09:55:32 +0000

Has Mythbusters tested electromagnetic levitation at earth’s magnetic poles?

By: MSpears

MSpears — Thu, 25 Aug 2011 07:20:50 +0000

Unfortunately, any modern laptop would automatically shut down before it could super-overheat, to prevent damage. In most computers, this is set somewhere between 70 degrees Celsius (158 degrees Fahrenheit) and 100 degrees Celsius (212 degrees F, the point at which water boils), FAR below the point at which anything in the computer would catch fire, even in pure oxygen.

By: Caleb

Caleb — Mon, 06 Dec 2010 20:24:11 +0000

It’s nothing to do with magnetism. You can probably find tutorials on YouTube about how to make them. They are a LOT of vidoes about them.

By: Jayvee

Jayvee — Fri, 26 Nov 2010 04:55:49 +0000

I read the myths and i find it helpful for my science project, What did you use again to make that triangular Aluminum foil thingy levitate? , some kind of Electromagnet and high voltage?

By: Tristin Black

Tristin Black — Sun, 21 Nov 2010 00:18:45 +0000

Where on the internet can I see the tin foil experiment, materials list and instructions?