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Lawnie posted:Thank you for correcting this misconception; I'll never forget induction loops after an AP physics exam wanted you to derive all the necessary equations to determine current through a changing shape, moving rectangular loop Also it's annoying when people don't know about them because they stop too far back at red lights and everyone gets stuck.
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Jul 17, 2015 20:50
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Did miscegenation laws prevent marriage between a white non-Hispanic and a white Hispanic?
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Jul 17, 2015 20:56
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Golbez posted:Did miscegenation laws prevent marriage between a white non-Hispanic and a white Hispanic? Depended on what part of the country you were in. There were some states and times where it would.
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Jul 17, 2015 21:02
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Nintendo Kid posted:Depended on what part of the country you were in. There were some states and times where it would. I guess the worst, which seems like Virginia. I tried to find out and most I was finding is that it wouldn't have counted, but it might have in Virginia.
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Jul 17, 2015 21:07
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Golbez posted:I guess the worst, which seems like Virginia. I tried to find out and most I was finding is that it wouldn't have counted, but it might have in Virginia. Virginia probably wouldn't have cared about say some random white dude marrying a rich upper class Mexican (most of whom were from families that were still pretty much just Spanish because they didn't ever deign to intermarry with the native americans). But if they were just some random average person from Mexico who looked white enough, the court might rule it miscegenation.
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Jul 17, 2015 21:09
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Van Dis posted:Haha, really? Where? Washington state is doing this in some cases. I think it's limited to red turn arrows, and the rider has to wait a couple of signal changes before being able to go when the straight lanes have the green.
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Jul 17, 2015 23:35
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stubblyhead posted:Washington state is doing this in some cases. I think it's limited to red turn arrows, and the rider has to wait a couple of signal changes before being able to go when the straight lanes have the green. In Las Vegas, NV, it's legal for a bike to make an illegal left after 2 cycles, I believe. I've done it in front of a cop on the way to work (Didn't see him, or else I'd have probably waited just to be safe. The law is fairly new) and he didn't seem to blink despite being in perfect position to flash his lights and pull me over.
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Jul 18, 2015 01:18
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How the hell do you Americans keep track of all the different driving laws when you drive interstate? Every time there is a driving question ITT it does my nut that there's some weird quirk in Nevada or Oregon or wherever.
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Jul 18, 2015 10:40
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We do it by being massively ignorant of basically all traffic laws and just doing whatever seems reasonable at the moment. It sounds crazy, but it works.
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Jul 18, 2015 10:51
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Plus, the basics are the same everywhere, it's only niggling things or fringe cases where laws are different.
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Jul 18, 2015 12:00
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ineptmule posted:How the hell do you Americans keep track of all the different driving laws when you drive interstate? Every time there is a driving question ITT it does my nut that there's some weird quirk in Nevada or Oregon or wherever. You just see what other people are doing, and do that. I mean hell, Europe's more confusing because some of you drive on completely different sides on top of minor traffic rules differing between countries. Also rules on long distance freeways/toll roads tend to remain completely consistent besides exact speed limits all across the country, adn where they aren't, you'll see reminder signs when crossing state lines and periodically on the road.
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Jul 18, 2015 15:49
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I've noticed a really common watermark on images from many different sources online; it looks like two J characters rendered in a bitmap font, or like two rectangles with the top left corner missing. Does that watermark have a name? What's it's origin, and why is it so common?
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Jul 18, 2015 17:49
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ineptmule posted:How the hell do you Americans keep track of all the different driving laws when you drive interstate? Every time there is a driving question ITT it does my nut that there's some weird quirk in Nevada or Oregon or wherever. The obscure traffic law in question, namely that you can run a red light after two complete light cycles if your vehicle didn't trigger the light to change on its own, is traffic trivia not traffic law. First off, if I was behind you and waited two entire cycles, you'd either be deaf from the sound of my horn or I'd have run you over a cycle and a half ago. Second, there is not a cop, judge, nor jury in the land who would convict a motorist who'd come to a stop at a red light, waited for the light to change, nothing happened, they waited for a safe break in traffic and then made an otherwise legal procession through the intersection. I believe this came up because someone said that bicycles don't trigger traffic lights, and that's why bicyclists run red lights. In the US, bicyclists are required to follow traffic laws (i.e. stopping at red lights), but almost universally don't - in fact generally blow through controlled intersections at almost full speed. The assertion, I believe, was that the reason bicyclists don't stop at red lights is because they don't trigger the light, so they are forced to run the light. Which may be true, but has nothing to do with why they roll through intersections without so much as slowing down.
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Jul 18, 2015 19:27
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Green_Machine posted:I've noticed a really common watermark on images from many different sources online; it looks like two J characters rendered in a bitmap font, or like two rectangles with the top left corner missing. Does that watermark have a name? What's it's origin, and why is it so common? Is it from JJ.am? It is/was a fairly popular image hosting site, long before the days of imgur. Used mainly on 4chan, pics got ripped and rehosted elsewhere.
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Jul 18, 2015 20:22
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photomikey posted:There used to be a site where you could plug in your home airport and some generic dates, and it would tell you where and when airfare deals were for those dates. I can't find that now. Anyone remember this, and can find it? Any of these? http://www.kayak.com/explore/ https://skiplagged.com/ Also on google flights, if you click the calendar when setting a date it will give you a bar graph of the cheapest flights a month before and after the requested date https://www.google.com/flights FCKGW fucked around with this message at 20:27 on Jul 18, 2015 |
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Jul 18, 2015 20:25
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A flat Earth thread broke my brain. Why is it that a hot air baloon can't hover and thereby travel one time zone in an hour?
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Jul 18, 2015 22:39
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Inertia. The balloon and all the air its traveling through is already rotating with the earth.
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Jul 18, 2015 22:48
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Say that the atmosphere was static and the earth revolved inside it, you'd have a constant wind going at the equator of around a thousand miles per hour or something. Clearly that is not the case.
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Jul 18, 2015 22:53
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But there's less inertia in air than solid matter right?
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Jul 18, 2015 22:58
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Baron Porkface posted:But there's less inertia in air than solid matter right? Assuming there's no wind, the air surrounding the balloon is moving at the same speed as the ground (i.e. zero relative to you, since you started stationary on the ground) and therefore applying no force to the balloon. Without force, a reference frame remains static, so the balloon stays where it is relative to the ground. (technically there are forces active in the reference frame, but since those are a) gravity and b) the buoyancy of the balloon, and those two act against each other, it's easier to say there's no forces in the system)
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Jul 18, 2015 23:05
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Baron Porkface posted:But there's less inertia in air than solid matter right? That's why you have the Coriolis effect. It makes hurricanes and other weather patterns spin the way they do, opposite on each side of the equator.
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Jul 18, 2015 23:26
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To clarify if a balloon is hovering is it "at rest" or "in motion"
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Jul 19, 2015 01:35
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Baron Porkface posted:To clarify if a balloon is hovering is it "at rest" or "in motion" In reference to what?
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Jul 19, 2015 01:54
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Newtons laws
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Jul 19, 2015 02:35
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No, I mean in reference to the ground, the air, the moon, what? It could be said to be either at rest or moving depending on the frame of reference.
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Jul 19, 2015 02:42
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The same reason why if you're inside a moving train and jump you don't fly to the back of the train. When you step on the train it's going 0 mph, as it builds up speed, it pushes you along and moves your velocity up to the same as the train. When you jump, you continue go the same speed as the train horizontally. Same thing with the earth & a balloon. When it's on the ground the earth is spinning @ 1000 mph and pushing the balloon with it. When the balloon launches, it's still going 1000 mph but the ground under it is going the same speed
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Jul 19, 2015 02:59
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hooah posted:No, I mean in reference to the ground, the air, the moon, what? It could be said to be either at rest or moving depending on the frame of reference. I don't understand. How can something be both at rest and in motion? quote:The same reason why if you're inside a moving train and jump you don't fly to the back of the train. When you step on the train it's going 0 mph, as it builds up speed, it pushes you along and moves your velocity up to the same as the train. When you jump, you continue go the same speed as the train horizontally. Same thing with the earth & a balloon. When it's on the ground the earth is spinning @ 1000 mph and pushing the balloon with it. When the balloon launches, it's still going 1000 mph but the ground under it is going the same speed Why aren't my organs rupturing from all this kinetic energy?
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Jul 19, 2015 04:11
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Baron Porkface posted:I don't understand. How can something be both at rest and in motion? Baron Porkface posted:Why aren't my organs rupturing from all this kinetic energy? This is one of those things where I know the answer but I can't put it into words and it's making me feel like a dumbass 
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Jul 19, 2015 04:25
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Baron Porkface posted:I don't understand. How can something be both at rest and in motion?
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Jul 19, 2015 04:26
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Nintendo Kid posted:You're sitting right now aren't you? Well the earth is spinning at incredible speed and going around the sun even faster and the solar system as a whole is orbiting the milky way even faster than that. And since you're at rest on the earth, you'r ein incredible motion along with it. And hell the milky way is moving at absurd speed around the center of the universe, while you're at it. 
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Jul 19, 2015 04:27
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Baron Porkface posted:I don't understand. How can something be both at rest and in motion?
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Jul 19, 2015 04:27
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Baron Porkface posted:Why aren't my organs rupturing from all this kinetic energy? Force is what hurts your organs, not energy.
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Jul 19, 2015 04:28
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Because newton's laws require you to have an inertial reference frame. That is why the balloon is both moving and not, because you can pick any drat other object you please to be moving at 0 m/s, and your balloon will have some velocity relative to it. That velocity can be 0. E: that fly example is worded very poorly and does not illustrate the principle you're trying to explain. The fly is moving at 0 mph relative to the car and 80 mph relative to the earth at the same time. You mean to say he does not need to provide any acceleration, and therefore force, to continue moving at whatever velocity the car is moving. Lawnie fucked around with this message at 04:32 on Jul 19, 2015 |
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Jul 19, 2015 04:30
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Baron Porkface posted:I don't understand. How can something be both at rest and in motion? "In motion" and "at rest" describe the relationship between two things; they're not properties that things can have on their own. And, like they say, it's not the fall that kills you, it's the sudden stop at end. You have potential kinetic energy; kinetic energy can only be measured relative to something else, and it doesn't really matter until you bash into something and are forced to change speeds very quickly. When you fall off a building, the real problem is that when you hit the ground, the bottom of you stops falling much more quickly than the top of you.
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Jul 19, 2015 05:30
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Since bagless vacuums have been around at least a decade by now, has anyone come up with a less messy way to empty them then taking them outside? That's fine for summer, but sucks in the winter. A second question: Is there a name for the lyric construction in e.g. the Miss Susie song ("Miss Susie had a steamboat; the steamboat had a bell./The steamboat went to heaven, Miss Susie went to/Hello operator...")?
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Jul 19, 2015 17:15
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I know that mixing bleach and ammonia based cleaning products is an awful idea, but what about cleaning out a cat's litter box with a bleach-based product? I'm pretty sure cat urine involves ammonia, but I've never heard of any kind of warning like that before. Is it not concentrated enough to be a problem or something or is it still a really bad idea?
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Jul 19, 2015 17:52
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Organza Quiz posted:I know that mixing bleach and ammonia based cleaning products is an awful idea, but what about cleaning out a cat's litter box with a bleach-based product? I'm pretty sure cat urine involves ammonia, but I've never heard of any kind of warning like that before. Is it not concentrated enough to be a problem or something or is it still a really bad idea? You could always wash it out with hot soap and water first. It's plastic, right?
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Jul 19, 2015 17:58
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hooah posted:Since bagless vacuums have been around at least a decade by now, has anyone come up with a less messy way to empty them then taking them outside? That's fine for summer, but sucks in the winter. https://en.wikipedia.org/wiki/Miss_Susie#Structure
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Jul 19, 2015 18:15
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photomikey posted:Does this help? Yeah, that got me to enjambment, which describes what I was looking for.
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Jul 19, 2015 18:34
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hooah posted:Since bagless vacuums have been around at least a decade by now, has anyone come up with a less messy way to empty them then taking them outside? That's fine for summer, but sucks in the winter. Well you could either empty it into the bin inside, or into a bag. But them you might as well skip that step and have the bag in the machine for convenience and to make it less likely to spill the contents. Now it's a bagged vacuum.
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Jul 19, 2015 21:24
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