Recent content by easyrider

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    Undergrad Why is exit wound in a rifle gun shot injury bigger than entry wound?

    I think its more about the projo expanding or tumbling. Any decent hunting bullet is designed to expand(or fragment violently if youre after varmints). The big cavity you see in ballistic gel(and human flesh for that matter) is only temporary, as gel/flesh are very flexible. Hence why I doubt...
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    Graduate What is the maximum energy density of EM radiation and its effects?

    Thanks. Okay it would vaporize the container, let put me put the question this way. If you were somehow put on the surface of a planet with no atmosphere, or heck just in the vacuum of space period, and you were very near to a nuclear fusion explosion, or really any source of a huge amount of...
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    Graduate What is the maximum energy density of EM radiation and its effects?

    Hi yall, I have a few questions in regards to EM radiation and photon density, or energy density; not sure what exactly the correct term would be here. (1) Anyway, first off, excluding the possibility that a black hole would form, is there anything that would limit EM radiation energy density...
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    Graduate What is the current explanation for apparent superluminal jets?

    Okay I am sort of confused. Is it saying that the jet is truly faster than light? Or is it kinda the same as, for example flicking a laser across the moon and the "point" is technically FTL but is otherwise meaningless as there is no linear superluminal motion and no information being...
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    Graduate What is the current explanation for apparent superluminal jets?

    Im not going to pretend to be more educated than I am. Now I know the usual explanation is that the jet is at a pretty significant angle in relation to the observer. But, http://en.wikipedia.org/wiki/Superluminal_motion makes it seem the jet truly is traveling FTL. I was just...
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    Which type of rocket engine offers the best performance for spaceflight?

    Yes I know the difference between a "jet" and a rocket. I should have specified but I was trying to encompass everything that's propelled by a jet that doesn't need air that may not exactly fit in as a rocket. Rockets are propelled by a "jet" or stream of high speed high temperature gases along...
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    Which type of rocket engine offers the best performance for spaceflight?

    With jet propelled vehicles, specifically space borne vessels; does exhaust velocity pretty much determine the ultimate velocity that can be reached by the vehicle on a given amount of fuel? Out of all the classic chemical combustion rockets, so H2 has the highest actual exhaust velocity...
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    Which type of rocket engine offers the best performance for spaceflight?

    Ok, I am going to start this out by saying I know little about rocket engines, but I sure wish I knew more. When looking at things like specific impulse, thrust to weight ratio, actual exhaust velocity, etc; what type of rockets are the best choice/most used? Ie, solid, liquid bipropellant...
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    Graduate Debunking the Big Bang Theory: Colliding Branes as a Possible Alternative

    Okay so Marcus, was there ever a time in the Universe where there was nothing but photons? Or was there always matter regardless of how far back one goes? Also, so are you saying that the statement "many galaxies were squeezed into the size of an atom" is true or untrue? I thought that didnt...
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    Undergrad Maximizing Laser Focus: Understanding Divergence and Distance Limitations

    Hm, please elaborate. What do you mean by uses lasers to remain in a fixed configuration? Dyou have a link/site with more info? Also, yes I am aware of atmospheric effects on the beam, I meant strictly in a vacuum.
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    High School Way Way Bigger than Canis Majoris?

    I want to say the escape velocity of neutron star is something like 100,000 km/s.
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    Undergrad Maximizing Laser Focus: Understanding Divergence and Distance Limitations

    Thanks for your reply. If one has a big enough aperture and the right optics, you could focus it out to 1 or 2 light-seconds couldn't you? Is there a limit to how far off a laser can be focused?
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    Graduate Is entanglement still considered spooky ?

    Exactly, we may know what happens but why is it happening? Spooky indeed..
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    Undergrad Travel Instantly: Is Distance Still a Factor?

    Wow, I just realized that now that you said something. Lol dang klingon you revived this thing just to say that?
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    Graduate The diffence between expanding universe and light slowing?

    Correct shifty, OP is just saying what if...