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User is offline Jun 20 2005 07:40 PM
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  1. In Topic: 91 Reasons to Hate Episode III

    Posted 20 Jun 2005

    It's been forever since I invited myself in to play pedant.

    #14: Actually, there's probably plenty of gravity where they are. They're pretty clearly at a low-orbital altitude, most likely around the mesosphere (hard to tell without more geological data on Coruscant than I care to have). You're only weightless at that altitude if you're orbiting, which requires a lot of horizontal movement. The main reason we orbit is that it allows us to stay up by constantly "falling" in a circle, thus expending little fuel. Since Star Wars engines don't appear to be particularly short on fuel, Greivous's ships presumably went more or less vertical until they were intercepted by Republic forces, and then held position while they attempted to fight through the blockade. SW ships do have artificial gravity, but there are any number of acceptable reasons why this might have been off when the topsy-turvy started happening.

    #15: Vacuum doesn't really exert any force (given #14, they're also not really in a true vacuum, but it's close enough for our purposes). When a window blows out, the force exerted on you depends on the amount of air able to escape, the size of the hole, the shape of the area you're in, and (most of all for this case) how close you are to the hole. Air can only escape at a certain rate, which depends entirely on the pressure differential and the size of the aperature. If the hole is big enough, all the air will escape at once-- this is the much-misunderstood "explosive decompression", and yeah, everything not bolted down (and some things not bolted down well enough) will be sucked out then. When it's just one panel in a relatively huge chamber connected to other areas of the ship by big open hallways, then it'll be a steady wind that lasts as long as the air in the ship does. When room is much wider than the hole is, the force exerted by the wind decreases exponentially as distance from the hole increases. The minimum force it would take to pull you sideways as you clung to a railing is right around 1.5 - 2 gravities, which isn't much worse than doing a pull-up. I'm not going to try to do the math without a detailed set of schematics for the ship, but there is certainly a distance where the wind will exert at least that much force, but not so much that strong Jedi-fingers can't keep their grip at least for a while.

    "Cold" is also not a form of energy that goes into a ship once a hole is punched; rather, heat gets out. As long as you don't run out of heat (in the form of warm air), you're fine. Gases do absorb heat as they expand, but again, as long as you have enough air to keep the pressure relatively constant, you shouldn't experience significant problems.

    The bends (and other forms of dysbarism) would be a concern, but only once the air pressure had lowered, which requires running out of air-- something that didn't seem to be a problem on the huge, poorly compartmentalized vessel. The Bernoulli principle might apply here, but it's not significant enough or for an extended enough period of time to trigger dysbaric symptoms.

    #21: I'm assuming they use some sort of invisible force field similar to the ones they use on spaceship docking bays. Or whatever. But they certainly have the tech to allow high-altitude balconies (especially for VIPs), so I actually prefer that they don't waste time explaining it to me.

    Other than that, good show! I'm particularly fond of 22 and 4 (just like some fantasy novels are basically transcripts of someone's D&D campaign, this movie really felt like they designed the video game first).

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