9 Laws of Physics That Don't Apply in Hollywood 807
Ant writes "Neatorama lists nine laws of physics that don't apply in Hollywood (movies and television/TV shows). In general, Hollywood filmmakers follow the laws of physics because they have no other choice. It's just when they cheat with special effects that people seem to forget how the world really works..."
Been there, done that. (Score:5, Informative)
The "Hollywood special" from a few moths back.
Copper doesn't spark (Score:5, Informative)
Re: (Score:3, Funny)
Do they mean, uh, darkness?
Re:Copper doesn't spark (Score:5, Funny)
Mood lighting. If you want sparks, you need mood lighting, a little vino, and some sexy R&B.
Pet Gun Peeve (Score:5, Informative)
Re:Pet Gun Peeve (Score:5, Informative)
After firing 800 rounds with one magazine, the actors start talking to each other calmly.
Try this, fire 4 rounds from an AR-15(or M-16 if your lucky) with no earplugs.
Now try to hear ANYTHING.
Your ears will be ringing like churchbells.
The 5.56 is such a high pitch that it rings your ears very easily.
Re:Pet Gun Peeve (Score:5, Funny)
Re: (Score:3, Interesting)
(personally I think its a shame our boys in the sandbox are stuck with the M16 when there are better calibers and platforms available... FN-FAL is my choice...)
The two years I spent in Afghanistan, I thanked my lucky stars that you "stopping power" nuts didn't get your way. 5.56mm has plenty-nuff kill-kill in it. We're not hunting deer or bear. We don't need a 12 pound, three-and-a-half foot, 20 round mag monster weighing us down, getting caught trying to exit vehicles, and reducing our ammo count while increasing its weight. 99.999% of the time we aren't shooting at people. Face it, .30-cal went the way of the dinosaur FORTY YEARS AGO--- it ain't comin' back to
Re: (Score:3, Informative)
How do you know, you weren't talking lauder after firing?
You missed his/her first paragraph — about talking to each other calmly. Combatants don't do that — not with own side, not with the enemy.
Re: (Score:3, Insightful)
Re:Pet Gun Peeve (Score:4, Informative)
My pet peve with holleywood is mortars, they drop a 81mm down the tube and they put a little ploop on the sound track that sounds like a wine cork being pulled. a 40mm grenade launcher like a M79 or a M203 makes a little ploop but a mortar goes Ker-fucking-Boom loud enough to slap your cheeks against your gums.
Re:Pet Gun Peeve (Score:4, Interesting)
Man, I miss Marine boot camp. It was a lot of fun
I fired my M203. Boy I missed them. Yeah, they make a nice bang.
I remember during my Marine boot, when we did live grenades, some dude threw his like a girl. It did not go far enough to be in a "safe zone" so the instructor with him threw him into the trench pit (I don't remember if there was a Corps name for it). Me and my fellow recruits were all in a building in-line waiting for our turn. However, we were able to watch what was going on. I remember when that grenade went off. I can not imagine how something so small could make suck an explosion. The force from the grenade was just incredible.
Man I miss the Marines bootcamp
Re: (Score:3, Informative)
That theory fits when the enemy is throwing concussion grenades. Those just make a godawful loud bang and displace a lot of air (hence the loud bang of course). The purpose is that the shockwaves will force the enemy down, either by the force of the blast, or by laying down like you heard.
The other type of grenade, the fragmentation grenade, produces a smaller bang, but if you're in the blast radius, you're screwed, because it showers hot, sharp fragments of casing everywhere. If you're in the blast, you'l
Re: (Score:3, Informative)
Re:Been there, done that. (Score:4, Funny)
Re:Been there, done that. (Score:4, Interesting)
Try firing an incendiary tracer into water (at night). I don't understand the physics of it, but you can see the round move in a spiral like some sort of futuristic rail gun from the movies.
Re: (Score:3, Informative)
Re:Been there, done that. (Score:5, Funny)
Re:Been there, done that. (Score:5, Interesting)
I've watched mythbusters (including that episode) and they can be pretty amusing, but please don't confuse them with actual evidence. It is a TV show mostly about making stuff blow up. I know from personal experience that bullets do not "disintegrate" on contact with water from normal firearms. You can watch incendiary rounds as they go through the water (although they are probably subsonic). I had a friend accidentally shoot himself in the foot with a .22 when he fell through the ice on a pond and the bullet certainly went through quite a bit of water. I once saw a jackass shoot a carp with a shotgun, while it was under about 24 inches of water, and the rounds certainly reached it.
As young kids we routinely used an old gravel quarry as a shooting range and it was mostly full of water. Someone standing on a typical shoreline and firing at someone or something maybe 20 feet out would experience rounds deflecting off the surface and hitting things on the other side. It is one reason hunters are cautioned about shooting rifles towards water. A rifle round can hit the water and skip half a mile across to the far shore and kill someone.
Again, mythbusters is TV, do not try to take anything they "prove" as some sort of fact. Half the time, they don't seem to have any real intention of finding out if something can happen, just making a big mess and some explosions. It is entertainment, not science.
Re: (Score:3, Informative)
Again, mythbusters is TV, do not try to take anything they "prove" as some sort of fact. Half the time, they don't seem to have any real intention of finding out if something can happen, just making a big mess and some explosions. It is entertainment, not science.
I dunno. I think their demonstration with the .50 caliber was pretty conclusive. I don't have a hard time imagining that a supersonic round would disintegrate on impact with water. As you obviously know, a .22 doesn't even compare to that.
The
Re:Been there, done that. (Score:4, Interesting)
Steel cases, not steel jackets, IIRC. (Score:5, Informative)
You used to find this stuff under the "Wolf" brand name, and it was mostly made in Russia and some other ex-WP countries. I think Wolf may be trying to move upmarket and has ditched the steel-cased stuff, recently though.
At any rate, the bullets in that stuff were pretty standard at least that I ever saw, but instead of using a brass case, as is used in most Western countries' ammunition, they went with steel cases, covered in some sort of paint and lacquer (assumedly for rust-proofing). There were a number of issues with it, particularly in close-tolerance weapons. First was just the threat of damage to the chamber because it's a harder metal (although I have doubts about this), more significantly was that if you blasted a bunch of it off rapidly, you could get the gun's chamber hot enough to start melting the lacquer off of the cartridges, and over time, build up a layer of lacquer inside the chamber, that would change its dimensions, and lead to feed problems, particularly if you switched back to other types of ammo.
I know a number of people who got burned by the lacquer-buildup problems, because they had AR-15 style rifles with tight-tolerance chambers (the
Re: (Score:3, Informative)
As a matter of fact, almost all the steel cased rifle rounds I've seen have steel bullet jackets too, though there are a number of brass cased rounds with steel jackets too (I've got a few boxes of Sellier & Bellot
If you need proof, pull the bullet and stick a magnet to it
That being sa
Not really 'sparks' in technical sense. (Score:4, Informative)
The muzzle flash that comes out of a gun is superheated gas, the product of the powder's rapid combustion; a "spark" would indicate some form of burning / incandescently-hot large particles, and there really shouldn't be anything that big left after combustion. If there are big (enough to be visible) chunks of burning powder coming out the muzzle of your (modern) gun, you have some sort of problem. I'm not sure whether you'd even technically call a real muzzle flash a "flame," since it's not really burning anymore; the majority of the chemical reaction that launched the bullet, ran to completion in the first few fractions of a second after the primer detonated. On weapons with short barrels, the muzzle flash is visible because the exhaust gases exit the muzzle out into the atmosphere before they've had a chance to cool below the point of incandescence. I don't think there's really anything in the way of actual 'combustion' still going on.
Muzzle flash is another thing that Hollywood tends to exaggerate; although it's definitely an issue in real life, it's more difficult to see on a bright, sunny day than you'd expect from watching action flicks. FWIW, I think that they simulate muzzle flashes by using propane or methane, particularly for automatic weapons, in movies.
Re:Been there, done that. (Score:4, Funny)
Full... Metal... Jacket...!!!
Sorry, couldn't resist. One of my favorite movies of all time.
Re:Been there, done that. (Score:5, Informative)
M-14, the rifle from the Basic Training there in the first part is a 7.62mm caliber weapon, the M-16 is a 5.56mm
Same topics all over again (Score:5, Insightful)
Re:Same topics all over again (Score:4, Funny)
Comment removed (Score:5, Insightful)
Re:Same topics all over again (Score:4, Funny)
yes and no
That belongs in the tags, not the comments.
Re:Same topics all over again (Score:4, Funny)
Re:Same topics all over again (Score:5, Insightful)
BTW, "2001, A Space Odyssey" was true to the no sound in space law and used it to dramatic effect. All you heard was the dull whir of systems in the pods or the astronaut's breathing.
Intuitor (Score:5, Informative)
http://www.intuitor.com/moviephysics/ [intuitor.com]
Comment removed (Score:3, Insightful)
Re:Outerspace is Cold (Score:5, Informative)
That one bugged me about a recent Battlestar Galactica, as well. Inside the room, the characters were freezing because the air was leaking away. (Thus cooling the room.) I can accept that. But once they're blasted into space? Not a chance of freezing. No air for cooling == no loss of heat. (Actually, you can still lose it slowly through black-body radiation, but that's another topic.) Human skin is pretty good at holding pressure, so the big things are:
- Don't hold your breath (unnecessary internal pressure)
- Close your eyes (they're more susceptable to decompression)
See the research into the Space Activity Suit [wikipedia.org] for more info.
Re: (Score:3, Interesting)
Re:Outerspace is Cold (Score:4, Informative)
When you sweat, the fluids come from inside your body. Since they're already heated, they will carry away some of the heat when they vaporize. So you'd probably die of other causes long before you overheated.
In the Space Shuttle, however, the bay doors are opened for heat rejection when in flight. Unlike the "cold" problem we see in Star Trek whenever they lose power (e.g. TNG: Booby Trap), they're far more likely to overheat due to the heat rejection systems being inoperable. (Presumably, a ship like the Enterprise would have a circulatory system that would pump heat from the inside of the ship to the outer skin, where it would be rejected as black body radiation.)
Re:Outerspace is Cold (Score:4, Informative)
Re:Outerspace is Cold (Score:5, Funny)
Re:Outerspace is Cold (Score:5, Funny)
Re:Outerspace is Cold (Score:5, Informative)
The part you are referring to is heat transfer mechanism (1), conduction, as your body heats cooler air molecules around you. Mechanism (2), as occurs when those heated air molecules rise toward the top of the room making room for cooler ones, also requires air.
However, mechanism (3), the most effective of the three, does not require any medium at all. You, like all baryonic matter, emit electromagnetic radiation with frequencies and intensities as described by blackbody radiation, dependent on temperature. An object twice as hot gives of 16 times as much heat in radiation per unit time.
Normally, when sitting in front of your computer, you are radiating like mad, and so losing heat. However, so are the walls of your apartment. Those walls, being nearly the same temperature as you are, heat you to a large degree, making up for the heat that you are losing to radiation. Hence if, on a cold night, you are walking down a hallway in which one wall has a fireplace behind it, you immediately notice how warm the wall is without coming anywhere near it.
Considering that the "walls" in space are the 2.73K cosmic microwave background radiation, and that a person's temperature is more like 300K, you would radiate 10^8 times more energy than your receive. You'd freeze in a hurry.
Now, if there's a star heating you from one side, this can partially make up the difference. You still get the one-side-super-hot and one-side-super-cold problem, then, like the surface of Earth's moon writ small.
Re: (Score:3, Insightful)
Two words: evaporative cooling.
That's how the Space Activity Suit keeps you from overheating while working against its resistance.
Re: (Score:3, Interesting)
Re:Outerspace is Cold (Score:5, Interesting)
1. They are called Sound Suppressors [wikipedia.org]not "silencers". They do not "silence" the sound just diminish it.
2. They do not really suppress the sound the way movies put it (I am looking at you Mr. Bauer).
silencers (Score:3, Informative)
Don't forget that you want to use a lower grain count in your rounds, to reduce muzzle velocity. The last thing you need is the "pop" of a supersonic bullet giving you away. To compensate for the reduced muzzle velocity, use a bigger caliber to get the same stopping power.
So: large caliber, reduced power round, flash/sound suppressor on the barrel.
Re:Outerspace is Cold (Score:4, Informative)
I would add that the author of TFA doesn't understand the physics of hand to hand combat very well. It is true that targets will not fly accross the room when kicked. In fact the better targetted the kick the less they will recoil. However, when kicking you are accelerating much of your body (hip, leg, foot) toward the target. The reaction has to overcome this momentum. Furthermore, if you use orthodox technique you have a connection to the ground specifcally designed to transfer the reaction through my musculo-skeletal structure into the earth (the emphasis on this base varies from style to style, but it always exists). In movies people are always jump kicking, but in real life that is of limited utility. You don't want to lose that connection to the ground unless absolutely necessary.
Re: (Score:3, Interesting)
They are called Sound Suppressors not "silencers". They do not "silence" the sound just diminish it.
Yeah, and they're called "automobiles" not "cars." The term "silencer" may not be as precise as you like but it is just as valid a term as "suppressor."
They do not really suppress the sound the way movies put it (I am looking at you Mr. Bauer).
There are a lot more variables here than you are implying. I have some first hand experience with home-made silencers from my nonstandard youth. A .22 caliber is the most commonly suppressed round historically and used for assassinations. With a dry suppressor made in the basement, a .22 semi-auto will make the typical action noise and you can hear the
Re: (Score:3)
Um, yes.
"but in that case, you'd have to reload after each shot.."
Well, you have to manually cycle the action to load the next round. But if you're using that kind of gun you're probably expecting to kill your target with one shot anyway.
But with subsonic ammunition, even the silenced MP5 firing full auto isn't horribly loud. You'd hear it from a reasonable distance away, but probably wouldn't even realise it was a gun until you saw bul
Re: (Score:3, Informative)
Re:Outerspace is Cold (Score:5, Insightful)
But I recently found out, from a colleague over beer, that loss of heat from blackbody radiation is actually much faster than I thought. In the old days, in non-cold places, some people (ancient Egyptions among others) would actually make ice, basically by letting water in a deep, dark place radiate it's heat away. Sure it took hours, and it had to be already pretty cold outside, but considering that the water was also being continually warmed by all the air around it, that's pretty impressive for "only" blackbody radiation.
It's pretty easy to calculate heat loss. According to this [wikipedia.org], in our 293K atmosphere we lose 95W. In a 2.7K vaccuum this translates to 640W, due to us not getting any energy back from the atmosphere. With an average human body heat capacity of 3470 Joules per Kelvin per Kilo, a 70Kg person will drop to the freezing point from 305K in less than 3 and a half hours.
Ok, so that's pretty slow. Damn those movies suck.
#3 is partially incorrect (Score:3, Interesting)
also partially incorrect (Score:5, Informative)
until they burned out. old WWII radio dial markings from military gear have a lot of brown markings. they are radium paint with the phosphors all burnt out atomically, like a ghost image on a burned-in computer screen or monitor screen on an ATM. still radioactive and dangerous if ingested.
radium, polonium, radiocobalt, and other strong alpha emitters will emit a Czerinkon glow of blue when in the presence of hydrogen or water, which may be what you are thinking of. the blue glow is that of ionized hydrogen from the alpha hits, however, and should be thought of as a form of phosphorescence.
Re: (Score:3, Informative)
Add one to that (Score:5, Funny)
Re: (Score:3, Funny)
9 Bad Excuses for a Fluff Piece (Score:5, Interesting)
That being said:
In most instances that come to mind, the director takes care of this problem by zooming you in on the Volcano, shell explosion, or baseball hit. Once you hear the sound at the source, the director usually cuts away to the actors after the sound has arrived. (As can usually be surmised by the ash and dirt flying at the camera.)
To the human ear, they are effectively simultaneous if the lighting crack is close enough to the observer. Considering how LOUD the director usually chooses to make the thunder, I don't think it's that bad of a summation. How about we start worrying why the actors aren't taking shelter?
This is actually incorrect. Radioactive "things" can emit light through two other methods:
1. They grow physically hot enough to glow red-hot or white-hot.
2. They heavily ionize the air around them, creating pretty streaks and rainbows.
However, the green-glow often seen in movies and cartoons does usually require the presence of phospher.
Or... the kicker could be properly grounded. If the kicker is properly braced against the ground, it's not impossible to send an unbalanced opponent off his feet. The fact that you can pick an opponent up and toss him in a single motion demonstrates that. That's not to say that the exact situation of many fights isn't ridiculous (excuse me, rediculous), but the physics of the situation don't prevent a kicker from delivering a blow hard enough to knock someone off their feet. Perhaps even to the point of sending them flying. (Though it's unlikely that it would be to the point of many kung-fu movies on strings. There's only so much structural capacity in the human body. After that, you start breaking your own bones.)
:-P
Now when they miss their target and don't go flying across the room...
Unless, of course, there is some sort of incline for a takeoff (ever notice how the Duke boys always manage to find that conveniently placed incline?) or the second section is lower than the first, thus allowing for the jump to complete depsite the drop in altitude. (As the camera appeared to make the situation in Speed.)
Smash cuts don't exist in real-life, either. Yet we don't complain about those. Slow motion is an entirely artistic thing, and is not related to the physics of the situation. At all.
Pretty much the rest of his arguments
Things still have to make sense (Score:3, Interesting)
I think when we see the tanker truck blow up, the Power Rangers jump-kicking someone in the chest, or Neo fly through the air like Superman, we understand it's fiction. It's called "suspension of disbelief." It's what makes movies enjoyable. No one is really going to think that these things happen as regularly (or at all) in real life as they do in the movies.
But the power rangers were established as having super powers, and superhero stuff generally gets a pass and sits more in the fantasy realm anyway.
Flying kicks (Score:3, Informative)
Not only that, but it fails to take into effect the masses of the two individuals. Just like I could push, kick, or punch a ball away from me, a person with enough mass can in fact repel a person of smaller mass over a certain distance. Perhaps not across the room and partway through a wall, but most people could alre
Re:9 Bad Excuses for a Fluff Piece (Score:5, Interesting)
Well, but you do realize they did actually jump a bus, right? This scene was not done through CGI or with a helicopter towing a bus over the gap. The bus really jumped through speed and momentum alone. The gap was not there - it was added later digitally (or rather, the freeway was erased) - but the bus did jump that distance.
Granted, it was a) a specially modified stunt bus on a ramp, and b) pretty much totally destroyed by the jump. But it's proof that you can jump a bus. It would not behave exactly as you describe. Keep in mind most buses are back-heavy, so with enough speed to keep the bus relatively level as it went over the ramp, the rear would actually drop as it moved through the air, not the front. With a short enough jump (as is all a bus is really capable of), the bus would probably come close to landing on all four wheels when all is said and done.
(Side-note - according to Wikipedia, they actually had to shoot the jump twice because on the first shot, the bus made the jump too smoothly, which supports what I'm saying above.)
Re:9 Bad Excuses for a Fluff Piece (Score:5, Insightful)
You're right, they DID jump a bus. BUT, they had a special kicker on the end of the ramp that dropped after the front wheels went over. Watch the scene again... see how the front wheels seem to leap up? There's a documentary around somewhere showing how everything worked and the actual bus jump, but I can't remember where I saw it or what it was called.
Even a car will always land hard on its front wheels (if you're lucky) or its nose or roof (if you're not) after going off a static ramp.
Re:9 Bad Excuses for a Fluff Piece (Score:4, Funny)
perfect vacuum (Score:5, Funny)
Hollywood movies suck so much it seems like they violate this one.
Re: (Score:3, Interesting)
How do you mean? I not aware of too many situations where Hollywood pretends there is?
For example, Star Trek has something called a "Navigational Deflector". This is a device (sort of a reverse tractor beam) that sweeps ahead of the ship and removes small particles from its path before they cause a catastrophe. Similarly, shows that posit the existence of hyperspace deal with this from the perspective of hyperspace being a shortcut to anothe
Re:perfect vacuum (Score:4, Funny)
O ------You
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/ | \
+
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Um, he was saying that Hollywood movies themselves ARE a perfect vacuum, in that they suck so much. Not a particularly funny joke, but a joke.
Number #1 broken rule (Score:5, Funny)
They are always using edits, skipping stuff and even going backwards and forwards. Really makes it hard to enjoy a film with your sense of reality totally shattered.
Re:Number #1 broken rule (Score:4, Funny)
Seems to me one day the terrorists will take advantage of that, and move when they know Jack is on the can.
Umm... (Score:5, Insightful)
Re:Umm... (Score:5, Funny)
Re: (Score:3)
In real life, people or large animals tends to stand there for a second after being hit...
All the people I know that really got thrown through windows suffered life-threatening...
You do know that just posting anonymously doesn't necessarily protect you against the people who are searching for you in the witness protection program, right?
Re: (Score:3, Interesting)
#4 and #5 (Score:5, Insightful)
1) The point of the Matrix was to bend the laws of physics. It was rather explicit.
2) The author obviously never watched Bruce Lee in action. If you plant yourself correctly you can send people flying across the room without moving an inch yourself. However, if you're in midair you certainly can't without the mentioned conversion of momentum.
Also concerning #5.
1) If it's a hole with level ends on both sides, it is entirely impossible to jump it on car without a ramp or other device to add a vertical component to velocity. However, in the event of a bridge being raised for a boat, the angle can potentially allow a vehicle to "jump" the gap. Is it likely or feasible? Not particularly, but it is possible.
2) This could have been expanded to include the "Bombs do not drop straight down" category of gravitational violation. A plane flying at high horizontal velocity v over a stationary target is not capable of dropping a bomb without horizontal velocity. Unless it fires the bomb backwards at a relative velocity -v, in which case we can have a semantic argument over whether the bomb is being dropped or fired.
Re: (Score:3, Informative)
Without resistance, the vertical component eventually might dwarf the horizontal.
However, if you look at a movie like Pearl Harbor you'll see planes dropping bombs straight down without any horizontal component at all. There's no initial velocity with is dwarved or diminshed. There is simpl
Re:#4 and #5 (Score:4, Interesting)
I've trained in various martial arts all my life. At one point in my life I was at an engineering school and I trained briefly with a class run by two physics professors. It really changes your perspective on some aspects of sparring when the instructor starts the class with, "you all know that f=ma, so let me show you haw to add the ground to your 'm' and increase your 'a' so the resulting 'f' sends your opponent flying."
That said, if you're not in contact with the ground, you will we recoiling when you hit an opponent and no they are not likely to go flying through the air when you strike them unless you are specifically throwing them or you are an idiot. The amount of force needed to move a person a significant distance is much, much, much greater than the amount of force needed to disable or kill a person if directed more effectively. I've seen video of Bruce Lee and he was amazingly fast and as a result transferred a lot of force because of the acceleration involved, but I never saw him hit someone and send them flying across a room.
Other laws (Score:5, Insightful)
Re:Other laws (Score:4, Funny)
Wile E. Coyote (Score:5, Interesting)
I was out surfing and paddled into a wave. When I jumped up to my feet, I missed the sweet spot of the wave and ended up on the breaking part instead (ie. not a good location). To this day I swear the wave dropped out from under me followed by the board while I hung there in midair. Misquoting Douglas Adams, "gravity finally looked my way and wondered what the hell I was doing" and down I went. The couple of people who saw it were sure I was surfing a board made by "Acme".
It was a really bizarre physical sensation I have not been able to adequately explain. (or recreate).
--Keith
Re:Wile E. Coyote (Score:5, Interesting)
That's possible: the water could pull the board downward faster than 9.8m/s/s due to surface tension. The board is somewhat 'stuck' to the surface of the water.
The same effect could explain how the water itself fell faster than 9.8m/s/s: wave action elsewhere created a suction below the water, such that atmospheric pressure above the water pressed down on it (and on the board), adding to the downward accelleration already provided by gravity.
the most famous example is not mentioned (Score:5, Interesting)
I refer, of course, to the infamous 250-shot revolver.
basically, back in the black and white days, nobody EVER reloaded their guns.
you never saw any recoil, either, but that's because those movies were made when men were MEN and sheep ran scared, and those actors were truly made of steel, riding horses at a full gallop and able to hit a bad guy in the back of the head from 300 yards with a pistol with a four-inch barrel. and their arms never moved when the revolvers and rifles fired.
and the scenery along the trail repeated itself every 60 yards or so, but then we're not going for the top 2,000,327 movie lies here, are we?
Re: (Score:3, Interesting)
Re:the most famous example is not mentioned (Score:4, Insightful)
Hollywood still does that. But with modern weapons being capable of holding an indeterminate size of clip (as opposed to the standard six-shooter), it's difficult to call them on it. They just throw a few clip ejections into the fray to make it seem like the characters are really reloading.
You can kind of call them on double-barreled shotguns, but Hollywood has slowly phased those out for pump-action weapons. Of course, those are similarly amusing, but for different reasons. I was just watching an old episode of Sliders the other day where the characters are carrying pump-action shotguns. Every time they cut to a new scene, the characters would re-pump their shotguns. Which was rather amusing considering that they hadn't fired a single round...
Re: (Score:3, Insightful)
I friggin HATE that! They do the same thing with lever-action rifles. I guess that could be a "Law of Physics"
i.e. "When there is a shell in the chamber of a 12 gauge shotgun, and you work the action, the shell is ejected."
There are plenty of "Laws of Firearms" that Hollywood doesn't obey.
The fact that they have weapons that never need to be reloaded, pistols that can shoot down aircraft or blow up vehicles, and rounds that
Re: (Score:3, Funny)
That's one of my peeves. They're always showing the bad guys shooting dozens of rounds at the hero, and they always miss. If I was that bad a shot, I think I'd retire from crime.
Never mind hollywood (Score:4, Insightful)
Re: (Score:3, Funny)
Frightening to think that grown adults still think that real life is like a television show or movie. Do they think that 80 lb. girls go around beating the Hell out 200 lb. vampires too? Do they think that groups of 20-somethings working in coffee shops are really able to afford vast New York City lofts? Do they think that there is any way Jack Tripper ISN'T gay?
-Eric
1 Law of Computers That Doesn't Apply in ... (Score:5, Funny)
Re: (Score:3, Funny)
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Middle C (Score:4, Funny)
Re:Middle C (Score:4, Interesting)
The quasi-official frequency for middle C is, as the original poster mentioned, 261.6ish. The rub lies in the fact that the only really "official", or at least widely accepted, standard of concert pitch defines A (as 440Hz), not C. On an equal tempered instrument, as most pianos are tuned, C will then end up at 261.6Hz. However, most other instruments allow on-the-fly adjusting of pitch (strings, winds, brass), which, at least in the hands of a capable performer, can result in being better in tune than an equal-tempered piano, as equal-temperment is a compromise that results in all intervals being slightly out of tune so that you can play in any key equally well (or equally poorly, depending on your point of view).
There's a handy little chart on Wikipedia [wikipedia.org] for the frequencies of each note given equal temperment on A=440.
Now, for the historical aspect, take a look at that chart and consider that a common Baroque (17th and 18th centuries) tuning was A=413, which means about a half step flat to modern tuning. However, during the same period, it was not terribly uncommon to have a tuning as high as A=475 (over a half step sharp).
Even though we've more or less settled on A=440, the parent poster is correct that modern orchestras often get higher than that to create a brighter sound (although usually not much higher than A=445). This occasionally results in something of an arms race, although there's only so high you can go before the instruments start acting up. This arms race can also happen on a personal level. One of my cello teachers used to play in a European orchestra, where this sort of thing is somewhat more common, and he said that sometimes there would be players who would purposely tune sharp to the orchestra so they would stick out (generally speaking, if you're sharp to the ensemble, you sound bright, and if you're flat, you sound out of tune).
Interestingly enough, although I have not researched this, from anecdotal evidence it appears that string instruments tend to be a bit friendlier when tuned flat of A=440. I first noticed this when comparing two recordings of the Kodaly Suite for Solo Cello. One recording I had (Janos Starker) was more or less concert pitch, but the Yo-Yo Ma recording was about a half-step flat of A=440. I discussed this discrepancy with my teacher at the time and his response was that he had tried tuning his cello like that for solo work, and found it to be "looser" and more responsive and forgiving. Because string instruments behave better when they're kept consistently in tune to one standard, and because I do a lot of orchestral playing, I haven't experimented with this much, but I have noticed times when both my cello and my bass felt better, and then later realized that they'd drifted flat (which happens if you only tune the instrument to itself for a while).
All that to say that while A tends to drift higher and higher if left unchecked, we might be better off if we actually went flat of concert pitch.
Oh yeah, and I find C=256 very handy for back-of-the-napkin calculations, since it means easy powers of two for each octave.
/musician rambling
on "no sound in space", "speed of sound", etc (Score:3, Insightful)
It's a matter of perspective. In a movie, the perspective is mutable. Don't think two asteroids colliding makes a sound? Try living inside an asteroid.
"Sound doesn't travel through a vacuum!" and "Sound doesn't occur when things happen to objects which are in a vacuum!" are two different and unrelated concepts.
For Animators (Score:3, Funny)
Tyres squealing (Score:3, Funny)
#4 is a bunch of crap (Score:3)
What about the others? (Score:4, Insightful)
2. If you find a single hair at a crime scene, it always will be from one the criminals, not any of the hundreds of other people who walked through the place recently.
3. If you run out of bullets, you are requirecd to throw your gun at your foe. You will also never be able to hit him with it.
4. Searching for a fingerprint in a computer database requires that every fingerprint in that database be displayed on your terminal. Also, when trying to break a password, you must display every single password being tried.
a couple of problems (Score:4, Insightful)
I think the author is confusing conservation of energy with conservation of momentum. In an elastic collision, in which energy is conserved, two people of equal mass will head in opposite directions. In reality, both the kicker and the kickee will absorb some of the energy of the kick, thus resulting in an inelastic collsion.
"For instance, in space the hero shouldn't be able to shout out instructions to the other astronauts from a spot several yards away."
That's what radio transmitters are for, and if you're wearing your helmet, you probably have a radio.
Explosions are what are particularly interesting. You will hear something as particles from the explosion collide with the hull of your ship, but it probably won't sound like an explosion.
Streets at night are always wet (Score:3, Insightful)
Re:Some points aren't valid (Score:5, Insightful)
Friction, dude. Try the experiment again on roller skates.
Re:Some points aren't valid (Score:5, Insightful)
Re: (Score:3, Informative)
Re: (Score:3, Insightful)
For the most part, what I see is not a race between the heroes and the explosion, but a race between the following two things:
Mostly, this is forgivable. Wh