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DarkHorse posted:Bats aren't fish Hold on, gotta go shave a chicken for this next bit.
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Aug 26, 2020 03:47
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DarkHorse posted:Bats aren't fish Yeah, they are lizards
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Aug 26, 2020 05:25
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PittTheElder posted:Bad news friend, it's actually derived from the Old English word hwæl, meaning whale. Which apparently is derived from PIE *(s)kʷálos meaning "large fish" or "sheatfish" which is in turn apparently a term for things like catfish. Cool!
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Aug 26, 2020 16:25
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Outrail posted:They figured out how to launch one and a half blue whales into the sun without ever thinking about whether they should. This is what Star Trek was trying to warn us not to do.
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Aug 26, 2020 18:55
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Brawnfire posted:Which apparently is derived from PIE *(s)kʷálos meaning "large fish" or "sheatfish" which is in turn apparently a term for things like catfish. Pasquale's!
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Aug 26, 2020 23:25
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https://twitter.com/FiveThirtyEight/status/1298740505598210050
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Aug 27, 2020 00:33
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maybe I'm just having a moment but I do not understand anything about those x-axes
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Aug 27, 2020 00:43
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morallyobjected posted:maybe I'm just having a moment but I do not understand anything about those x-axes Horizontal axis is 2016 Trump vote share, as a percentage for each media market. The seven different graphs each have their own axis from 20-80%. Vertical axis is sort of shared and represents percentage of searches pertaining to that sport compared to the total of all seven. The biggest unintentional takeaway from their data is that the NFL is a juggernaut, being almost as popular as the other six activities combined and evenly popular across partisan lines.
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Aug 27, 2020 01:15
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Aug 27, 2020 15:28
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Aug 27, 2020 17:58
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DarkHorse posted:Bats aren't fish If you consider "fish" to be a clade containing both, say, sharks and salmon they are. Bats are with us and all the other tetrapods over there on the left.
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Aug 27, 2020 18:53
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Hmm, yes, when I think of camping I think of food that needs to stay frozen before preparation.
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Aug 27, 2020 19:10
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DarkHorse posted:Bats aren't fish Then how can they swim??
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Aug 27, 2020 21:38
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Terribly. Just kidding they do a cute little breaststroke looking thing.
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Aug 28, 2020 00:00
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Legendary Ptarmigan posted:Horizontal axis is 2016 Trump vote share, as a percentage for each media market. The seven different graphs each have their own axis from 20-80%. Vertical axis is sort of shared and represents percentage of searches pertaining to that sport compared to the total of all seven. okay yeah I was just having a brain = bad moment. that makes way more sense. Mr.Radar posted:Hmm, yes, when I think of camping I think of food that needs to stay frozen before preparation. I take refrigerated/frozen foods camping all the time when I go. cooler filled with ice. but then I don't go like wilderness camping out in the middle of nowhere.
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Aug 28, 2020 00:14
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Mr.Radar posted:Hmm, yes, when I think of camping I think of food that needs to stay frozen before preparation. Nothing about camping that prevents you from items requiring refrigeration. You're thinking about backpacking.
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Aug 28, 2020 02:30
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 Kid's science kit.
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Aug 29, 2020 01:13
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Memento posted:
I certifiably sucked at chemistry but...that just caused me physical pain.
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Aug 29, 2020 01:20
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Alkydere posted:I certifiably sucked at chemistry but...that just caused me physical pain. I fixated on the impossible 0 pH (for what is supposed to be a logarithmic scale) and completely missed the horrendous transposition of labels
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Aug 29, 2020 01:49
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DarkHorse posted:I fixated on the impossible 0 pH (for what is supposed to be a logarithmic scale) and completely missed the horrendous transposition of labels In absolute terms it's not possible, but there is a functional zero given that negative pH values are possible.
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Aug 29, 2020 02:11
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I thought zero pH was impossible from a statistical point of view, not an actual chemical limitation.
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Aug 29, 2020 03:02
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DarkHorse posted:I fixated on the impossible 0 pH (for what is supposed to be a logarithmic scale) and completely missed the horrendous transposition of labels 1 mol/L HCl has a pH of 0. pH is concentration of hydrogen ions in solution with it being defined as H+ concentration (mol/l) = 10^-pH So if you have a pH of 0, your concentration of hydrogen ions in solution is 1 mol/L. pH can also go negative and is negative for Hydrochloric acid at concentrations higher that 1mol/L. 
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Aug 29, 2020 03:06
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hooman posted:1 mol/L HCl has a pH of 0. Gotcha, I just remember calculating -log(H+) and logarithms don't like 0
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Aug 29, 2020 03:23
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DarkHorse posted:Gotcha, I just remember calculating -log(H+) and logarithms don't like 0 log(0) is totally fine, that's just 1. log(x)=0 doesn't work. EDIT: DO NOT LISTEN TO THIS, IT IS LIES, ALL LIES Karia has a new favorite as of 05:06 on Aug 29, 2020 |
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Aug 29, 2020 03:27
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Karia posted:log(0) is totally fine, that's just 1. log(x)=0 doesn't work. Other way around. log(1) = 0 and log(0) is undefined.
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Aug 29, 2020 03:52
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Acids 'stronger' than Sulfuric acid are measured on a scale called the Hammett Acidity function, (H0). 18.4mol H2SO4 has a H0 of -12; Chemistry thread favourite HF has a value of -15.1; Carborane is -18; and Fluoroantimonic acid has a value somewhere between -23 and -21. Superacids gently caress.
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Aug 29, 2020 04:18
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hooman posted:1 mol/L HCl has a pH of 0. I thought calculating acidity was kind of complicated but this seems pretty basic.
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Aug 29, 2020 04:59
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ultrafilter posted:Other way around. log(1) = 0 and log(0) is undefined. I'm an idiot who should not do math past midnight.
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Aug 29, 2020 05:06
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Karia posted:EDIT: DO NOT LISTEN TO THIS, IT IS LIES, ALL LIES This part got a good laugh out of me, at least.
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Aug 29, 2020 05:09
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Karia posted:I'm an idiot who should not do math past midnight. Me too, but the midnight in question was sometime in 2002
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Aug 29, 2020 07:02
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Outrail posted:I thought calculating acidity was kind of complicated but this seems pretty basic. I see what you did there
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Aug 29, 2020 07:15
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Phy posted:Me too, but the midnight in question was sometime in 2002 For me sometime after 2015. Got a math minor and flunked out of Electrical Engineering after mastering Fourier (and sense forgetting it) but somehow can still do basic arithmatic in my head with relative speed that a lot of my peers couldn't and still can't. Probably why I flunked out and got a degree in general studies instead  I'm still torn if advanced Calculus makes me laugh or cry: Electricity poo poo is ALL freaky calculus to the powers of i, but at the same time I had a professor teach Linear Algebra all semester in my Cal II class, and my professor for Cal III was so bad the math tutors ran screaming from his work instead of trying to help you (Hint: if you're at Texas Tech and your Cal III teacher says the path from his office to happy hour at Bash Riprock's is a differentiable line: RUN).
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Aug 29, 2020 07:15
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Someone tell me what high schools do to people to make them think pH can't go negative. I've heard that myth quite often, it's really weird. I think the same people believe it can't go over 14 either?
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Aug 29, 2020 08:41
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Carbon dioxide posted:Someone tell me what high schools do to people to make them think pH can't go negative. I've heard that myth quite often, it's really weird. I think it's more "These are weird cases and basically what the scale was designed for, anything outside of these are weird edge cases for your day-to-day life" if you're dealing with a -1 or 16 pH you probably should have a chemistry degree or at least specialized training. I mean, if you "know" pH goes from 0-14 with 7 being Neutral then you're at least better than the people who think "Lower pH is better"...or is it higher is better? Whatever the crazy health food fad is.
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Aug 29, 2020 08:51
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Alkydere posted:I mean, if you "know" pH goes from 0-14 with 7 being Neutral then you're at least better than the people who think "Lower pH is better"...or is it higher is better? Whatever the crazy health food fad is.
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Aug 29, 2020 11:01
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Are there fad diets that push acidic diets? I think I've only seen alkaline/basic woo diets.
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Aug 29, 2020 11:15
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I’ve seen acidic diets alleged to combat the novel coronavirus.
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Aug 29, 2020 11:16
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I don't know if it's related, but in Dutch, constant complainers are sometimes referred to as "vinegar pissers".
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Aug 29, 2020 11:48
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Carbon dioxide posted:Someone tell me what high schools do to people to make them think pH can't go negative. I've heard that myth quite often, it's really weird. I think it's just the limitations of the typical definition of the pH calculation log(x) is undefined or doesn't exist for x < 0, so it would be easy to think pH is as well since that function is used to calculate it (and it's unlikely anyone would have experience with superacids or bases to know better)
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Aug 29, 2020 12:37
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You have to work very hard to get your pH lower than 0 or higher than 14 in an aqueous solution, which is the only kind of solutions non-chemists are familiar with. In fact, once you get outside of that range, your acid or base are concentrated enough that it can get iffy to argue that water is still a solvent and not an impurity in the mix. Concentration as a notion only has meaning in the presence of a solvent. For extremely concentrated solutions one would use activity instead. I’m sure someone else who’s studied this stuff less than 20 years ago will be able to tell you more about it. E: more to the point. pH=-log(concentration) and concentration is always positive, think of it as the number of chemical entities that are aqueous H+ ions per volume of solution. So your pH is always defined from a mathematical standpoint, that’s not a problem. HerStuddMuffin has a new favorite as of 12:53 on Aug 29, 2020 |
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Aug 29, 2020 12:49
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