|
FreshFeesh posted:A stupid, frustrating question I'd genuinely appreciate any help with: This started happening randomly on my LG TV’s YouTube app in the last few weeks. However, turning the tv off and back on again resolves it. Maybe something on YouTube’s backend SmartTV infrastructure is glitching and in need of some attention. Sorry this isn’t super-helpful, but you’re not alone.
|
#
?
Jan 2, 2023 15:45
|
|
|
|
| # ? Jun 11, 2024 17:42 |
|
|
Does anyone have experience sending a small high value package from EU to the US? I want to get a few of my trading cards graded and the estimated value can range from a few thousand dollars to over ten depending on the grade. 1) I will be sending it directly to the grading company - how can I make sure there will be no issues in customs and how do I figure out if there is a tax to be paid? 2) If, for some reason, the package gets lost, how would I prove to the shipping company the value of the cards?
|
|
#
?
Jan 2, 2023 18:43
|
|
|
Can you ask the grading company? Seems like a common question.
|
|
#
?
Jan 2, 2023 19:32
|
|
|
I'm trying to figure out if this can be turned into a math question: You have a roll of toilet paper. Each sheet is 10cm long and .5mm thick. There are 180 sheets on the roll. The cardboard roll around which the paper is wound is 6cm in diameter. First, is it possible to determine from that information the diameter of the roll? Second, what expression communicates how many sheets there are on a given "layer" of the roll? The first outermost layer would, of course, have the most with the final innermost layer only being like two.
|
|
#
?
Jan 2, 2023 20:28
|
|
|
tuyop posted:I'm trying to figure out if this can be turned into a math question: The number of sheets on a given layer should be a function of the layer's diameter and the length of a sheet: n=pi*D/(10cm). Choose D as the diameter of the middle of the layer. As for your first question, I haven't found a spiral function that works off of the thickness of each layer, just one that uses the inner/outer diameters, the number of layers, and the overall length of the spiral. Since number of layers and outer diameter are related, that leaves us with two unknowns. However, I'm pretty sure you can solve for outer diameter with the values you provided. It just may require some more complicated algebra or basic calculus. The problem is that the relationship between number of sheets and overall diameter is nonlinear, i.e. as you add more sheets, you get less and less additional diameter. This feels like a situation where you'd apply an integral, but my calculus is super rusty.
|
|
#
?
Jan 2, 2023 20:48
|
|
|
Double post oops
tuyop fucked around with this message at 21:21 on Jan 2, 2023 |
|
#
?
Jan 2, 2023 21:16
|
|
|
TooMuchAbstraction posted:The number of sheets on a given layer should be a function of the layer's diameter and the length of a sheet: n=pi*D/(10cm). Choose D as the diameter of the middle of the layer. I think it goes the other way, more sheets is more diameter, but yeah that’s what I was thinking. Definitely beyond my students and me then, though I am wondering what will be involved.
|
|
#
?
Jan 2, 2023 21:21
|
|
|
tuyop posted:I'm trying to figure out if this can be turned into a math question: I don't know exactly how to make it into a succinct question, but I solved it in excel without too much trouble. I converted everything to mm for simplicity. The roll is 60mm in diameter which means it has a circumference of 188.5mm. This will use 1.88 sheets (at 100mm per). After the first pass, there are 148.12 sheets left and a new diameter of 61mm. This has a circ. of 191.64mm which takes 1.92 sheets and leaves 146.2. I just filled down the cells until I got to negative sheets remaining. After 54 passes, the diameter is 114mm and there are 3.25 sheets of TP remaining that will overlap. There is definitely a way to write this up as a simple function, but I don't know offhand the easiest way to do that. Solving in excel is trivial, though. Here's my numbers if anyone wants to check. I used =pi() for pi. code:Mr. Nice! fucked around with this message at 14:20 on Jan 3, 2023 |
|
#
?
Jan 2, 2023 21:39
|
|
|
Mr. Nice! posted:I don't know exactly how to make it into a succinct question, but I solved it in excel without too much trouble. Oh that's a clever solution, I think that works and I teach Excel as well so great idea!
|
|
#
?
Jan 2, 2023 21:46
|
|
|
tuyop posted:Oh that's a clever solution, I think that works and I teach Excel as well so great idea! Awesome! Definitely double check my math and such. I'm glad I could help. E: someone did double check me and I didn’t increase diameter enough! Thanks, goons. Mr. Nice! fucked around with this message at 13:53 on Jan 3, 2023 |
|
#
?
Jan 2, 2023 21:53
|
|
|
Hyperlynx posted:Any clever ideas for using great big garbage bags with tiny bins? Ha, the real real question was "where do I find smaller bin liners" and I just realised the answer is "an office supplies shop"! https://www.officeworks.com.au/shop/officeworks/search?q=bin%20liners&view=grid&page=1&sortBy=bestmatch
|
|
#
?
Jan 2, 2023 23:05
|
|
|
Hyperlynx posted:Ha, the real real question was "where do I find smaller bin liners" and I just realised the answer is "an office supplies shop"! Get a bin that fits the colesworth fruit bags and use them as your bin liner. No point buying more plastic.
|
|
#
?
Jan 3, 2023 00:05
|
|
|
Mr. Nice! posted:I don't know exactly how to make it into a succinct question, but I solved it in excel without too much trouble. As an algebraic approach, consider a top-down view of the filled roll. It is a circle with some portion in the center occupied by the empty roll, and the rest occupied by paper. let f = radius of filled roll let r = radius of empty roll = 30 let n = number of sheets = 180 let l = length of one sheet = 100 let w = width of one sheet = 0.5 Area of filled roll = Area of empty roll + Area of paper pi(f^2) = pi(r^2) + nlw Divide out pi f^2 = r^2 + (nlw)/pi Isolate f f = (r^2 + nlw/pi)^0.5 f = (30^2 + (180*100*0.5/pi))^0.5 f = ~61.36mm radius (122.72mm diameter)
|
|
#
?
Jan 3, 2023 00:20
|
|
|
Inceltown posted:Get a bin that fits the colesworth fruit bags and use them as your bin liner. No point buying more plastic. I did also find https://biobagworld.com.au/ just now, when I thought "duh, why not actually just search for 'biodegradable kitchen garbage bags'"
|
|
#
?
Jan 3, 2023 00:45
|
|
|
tuyop posted:I'm trying to figure out if this can be turned into a math question: Rather than doing it iteratively, layer-by-layer, you can also just solve it numerically by looking at the volume. (or in this case the area of a 2d cross-section, since we don't know how wide the sheets are) With w as the unknown width: The volume of tp is 0.10m * 0.0005m * w * 180 = 0.009 m^2 * w the volume of the cardboard tube is pi * (0.06m )^2 * w = pi*0.0036 m^2 * w the resulting cylinder's volume has to be the sum of those two, so we set pi * r^2 * w = 0.009 m^2 * w + .0036 pi m^2 * w simplify and cancel out the w and we get r = sqrt ( 0.009 m^2 + pi*0.0036m^2 ) / pi or approximately r ~= 0.0454 m so the roll is 4.54 cm thick, or 9.08cm in diameter. this is pretty close to Mr Nice's result! (Of course, it is not actually accurate unless you make your toilet paper out of a magic material that can never stretch or compress.... but neither is any other solution. Such is life!) RPATDO_LAMD fucked around with this message at 01:10 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 01:07
|
|
|
What's the joke with  ? I see it used in a disparaging sense a lot.
|
|
#
?
Jan 3, 2023 01:24
|
|
|
Delphisage posted:What's the joke with To me it's just like, someone being educational about something, sometimes sarcastically though
|
|
#
?
Jan 3, 2023 01:28
|
|
|
It's used sarcastically and genuinely, it just depends on the context of the post. It usually comes up when someone has an interesting but not super relevant fact that they'd like to add, bit they don't expect it to change the course of the discussion.
|
|
#
?
Jan 3, 2023 02:07
|
|
|
If I put a frozen piece of meat in a ziplock bag into a bowl of hot water that isn’t deep enough to fully cover it, and then run hot water over it out of a kitchen faucet, will it heat up faster than if I ran the hot water into the bowl directly without hitting the meat? I’m having an admittedly silly debate with someone about thawing meat. My theory is that running water over the meat will be faster because it increases the surface area that is being heated (while the water-into-bowl method only directly heats the submerged meat), and to a lesser extent creates some minor convection as the water runs off the meat and into the bowl. The other guy claims the water going into the bowl will be faster because the water isn’t cooled first by hitting the frozen meat (so the water in the bowl will be warmer), and it creates much stronger convective currents. Will the same hold true for a material that conducts heat better than meat, say an ice cube (frozen cooking stock)?
|
|
#
?
Jan 3, 2023 02:32
|
|
|
Don’t thaw meat with warm water. Use cold water. It still works fast. Not sure which of your proposed methods is the fastest, but in a bowl with just a trickle of water to encourage convective currents and keep the water temp up works drat well. And it isn’t nearly as wasteful as just running a bunch of water on the meat endlessly.
|
|
#
?
Jan 3, 2023 02:35
|
|
|
Busy Bee posted:Does anyone have experience sending a small high value package from EU to the US? I want to get a few of my trading cards graded and the estimated value can range from a few thousand dollars to over ten depending on the grade. Are there literally no grading companies in the EU? If these items can be said to have any true monetary value, certainly there's not only one country on this planet that determines that value. In my experience, if you are truly worried about a package being lost, you insure it ahead of time. You say that you are shipping a package worth $10,000 (as an example). If you have to declare it as anything, you can call it memorabilia. Yes, it will cost you more to ship, but it's not going to cost you $10k to ship it. As a quick test, I just added $10K insurance to ship something from WI to TX. It bumped the total from about $15 to $150 on a 2lb package. That's a lot of money, but if I was shipping something irreplaceable, that I wanted to be sure was going to it's destination, I'd buy the insurance. Doubly so if it was something fragile. To put it another way, your cards have no value, either before or after their valuation. The value in this transaction is the box itself. If you don't get the insurance UPS might throw you $100, and that's if you can prove that it was in their possession last, before it disappeared. But if you pay for insurance, it gives you a leg to stand on.
|
|
#
?
Jan 3, 2023 02:48
|
|
|
Flash Gordon Ramsay posted:Don’t thaw meat with warm water. Use cold water. It still works fast. Not sure which of your proposed methods is the fastest, but in a bowl with just a trickle of water to encourage convective currents and keep the water temp up works drat well. And it isn’t nearly as wasteful as just running a bunch of water on the meat endlessly. Oh I don’t. I put meat in a bowl of cool water a few hours before I need to use it and let it come up to room temp slowly. This is only one of the reasons why this argument is entirely ridiculous. We’re arguing physics at this point, and neither of us know enough to prove the other wrong. Substitute cool water for hot water if it makes ya feel better 
|
|
#
?
Jan 3, 2023 02:52
|
|
|
Best thing I’ve found for thawing is putting it in a cast iron pan. Lots of thermal mass and no chance of leaks.
|
|
#
?
Jan 3, 2023 02:56
|
|
|
kedo posted:If I put a frozen piece of meat in a ziplock bag into a bowl of hot water that isn’t deep enough to fully cover it, and then run hot water over it out of a kitchen faucet, will it heat up faster than if I ran the hot water into the bowl directly without hitting the meat? Running water is better at transferring heat than still water. The other guy's argument pretty much makes no sense. He says the water will be worse at warming up meat because touching the meat first means it's colder, but the only way it can be colder is if has already transferred more heat to the meat. Nothing just gets hotter or colder on its own, there's always heat transferring from and to something.
|
|
#
?
Jan 3, 2023 02:58
|
|
|
kedo posted:This is only one of the reasons why this argument is entirely ridiculous. We’re arguing physics at this point, and neither of us know enough to prove the other wrong. Substitute cool water for hot water if it makes ya feel better
|
|
#
?
Jan 3, 2023 03:04
|
|
|
https://www.youtube.com/watch?v=ZxJVaQTWQ24 How does signaling a hole card from a different table help the cheaters?
|
|
#
?
Jan 3, 2023 04:37
|
|
|
Baron Porkface posted:https://www.youtube.com/watch?v=ZxJVaQTWQ24 You need 2+ cheaters working together. Alice reads the dealer's cards at Bob's table and signals that info to Bob somehow. Bob reads the dealer's cards at Alice's table and signals that info to Alice somehow.
|
|
#
?
Jan 3, 2023 05:17
|
|
|
Glasses guy is at the table with the bad dealer. Beard guy sees the dealers card from another table and sends a signal to glasses what his dealer has.
|
|
#
?
Jan 3, 2023 05:26
|
|
|
Baron Porkface posted:https://www.youtube.com/watch?v=ZxJVaQTWQ24 They're playing blackjack. Guy with the beard at the other table sees the card the dealer hasn't flipped and signals the guy with the glasses, who can see the dealers first card. Guy with the glasses now knows the dealers exact hand so far. Guy with the glasses is himself playing multiple hands at one time, betting on all of them aggressively, and always winning, which is what draws attention to him and eventually gets them both caught.
|
|
#
?
Jan 3, 2023 05:31
|
|
|
CzarChasm posted:Are there literally no grading companies in the EU? If these items can be said to have any true monetary value, certainly there's not only one country on this planet that determines that value. The two grading companies that I would like to have my cards graded at are PSA and BGS - both do not have any services in Europe so the cards have to be sent to the US. I guess my question was more around if I estimate the value to be $10,000 - wouldn't either UPS / FedEx ask me how I came to this value and if I can show any receipts? Obviously, I wouldn't have any receipts from cards that are over 20+ years old and since they were not graded, the value of the cards can vary by hundreds, if not thousands of dollars. Busy Bee fucked around with this message at 11:07 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 08:44
|
|
|
Do the shipping companies actually care how accurate your estimate is? You paid them one percent of ten thousand dollars for an event that has significantly less than one percent chance of occurring. In general overstating an asset’s value to insurer’s is done so that someone can commit insurance fraud, by causing a “freak accident” that wasn’t an accident at all. In the case of shipping, though, the shipper has control the parcel the whole time. You could only defraud them if you somehow caused them to lose your package while it was in their care.
|
|
#
?
Jan 3, 2023 09:15
|
|
|
Since Protons are what gives matter mass, is a bar of sliver 67% as massive as a bar of gold? Since Carbon and diamonds are the same element, why does coal have the property of being black and diamonds transparent? Baron Porkface fucked around with this message at 10:12 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 10:09
|
|
|
Protons and neutrons are what give matter mass, not protons alone. Silver is 54% the density of gold, not only because of the number of protons and neutrons in the atoms but also because of the arrangement of the atoms in the way they fit together, which is complicated based on the properties of the atom including the electron orbitals and stuff that I'm not 100% read up on. Coal is an arrangement of carbon, oxygen, nitrogen, hydrogen, and sulfur, it is very complex and made up of ancient rear end plants that got compressed and heated up in a specific temperature-pressure regime for long enough to make it into coal. Diamonds are made of pure carbon, and have not only been subjected to a specific temperature-pressure regime for an adequate amount of time, but also have been rapidly brought closer to the earth's surface by kimberlite pipes from which they are mined. Other forms of pure carbon like graphite have different crystal structures because they were subject to different temperature-pressure regimes in different parts of the Earth's crust. The crystal structure of diamonds is made of covalently bonded carbon, which makes it harder than any other naturally occuring mineral (as far as I'm aware). Graphite crystal structure is a bunch of flat little hexagons formed together into sheets stacked on top of each other, which is why they slide off so easily and make for good pencils. PiratePrentice fucked around with this message at 10:38 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 10:34
|
|
|
Baron Porkface posted:Since Protons are what gives matter mass, is a bar of sliver 67% as massive as a bar of gold? Atomic mass is based on both protons and neutrons, which have about equal mass. Silver has 47 protons and 61 neutrons, so it has an atomic mass of about 108 (actually 107.868 but let's ignore that). Gold meanwhile has 79 protons and 118 neutrons for an atomic mass of 197. So an atom of silver has only ~54% the mass of an atom of gold. In this case, their actual densities follow the same ratio. But one atom is not always the same 'size' as one atom. For example, helium is a gas, and has its one-atom molecules packed much more loosely than the atoms in a bar of gold. A "mole" is a unit for measuring a number of atoms. A cubic meter of helium has a mass of 178.5 grams, or 0.1785 kg, meaning it contains about 45 moles or 2.7 * 10^25 atoms. Meanwhile, a cubic meter of gold would have a mass of 19,300 kg, and would contain 98,000 moles, or 5.9 * 10^28 atoms, about 2000 times as many. Even though helium has an atomic weight of 4 and gold has an atomic weight of 197, gold is way more than just 50x as dense as helium. It's actually 100,000x as dense. Because it turns out there's just thousands of times more atoms in the same space. RPATDO_LAMD fucked around with this message at 10:43 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 10:40
|
|
|
Mass comes more or less* all from protons and neutrons. For example, nickel has one more proton than cobalt The only stable isotope of cobalt has thirty‐two neutrons. This, in combination with its twenty‐seven protons, gives cobalt approximately fifty‐nine atomic mass units. Nickel has five stable isotopes, but more than two thirds of them have a mere thirty neutrons. On average, nickel atoms have less mass than cobalt atoms. I am confused as to where you got the figure of 67% for the mass ratio between silver and gold. In proton numbers, they are 47/79, or 57.5%. In atomic mass, they are 107.87/196.97, or 54.8%. To answer the question of how much more massive the bar of gold is, however, we must know how closely the atoms pack. Gold and silver happen to be quite similar, both face‐centred cubic with about the same distance between atoms. This is by the way something suggested in the periodic table, by silver and gold existing in the same column, or period. Copper is also there.  So the density of silver to gold is almost the same as the ratio of their atomic mass, 54.4% at room temperature. *This “more or less”, the tiny discrepancy between what an atom’s mass “ought” to be if simple addition of protons and neutrons held, versus the actual mass of the atom, yields nuclear energy according to Einstein’s e = mc2. Platystemon fucked around with this message at 10:55 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 10:48
|
|
|
Is there a formula to calculate the time of sunrise/sunset using only location coordinates and date/time, or is more information needed? vv thanks dokmo fucked around with this message at 14:20 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 14:14
|
|
man
|
dokmo posted:Is there a formula to calculate the time of sunrise/sunset using only location coordinates and date/time, or is more information needed? Yep https://gml.noaa.gov/grad/solcalc/solareqns.PDF It's easier to just google it though, or keep an almanac on your phone if you got no internet PiratePrentice fucked around with this message at 14:27 on Jan 3, 2023 |
|
#
?
Jan 3, 2023 14:18
|
|
|
Is there a simple android app that will let me manually track how long I sleep for (ie. I enter in the times I went to bed and woke up)? I don't want it to try to figure out if I'm asleep or not or measure how much I snore or any of that stuff, just let me keep track of when I went to bed and roughly how much sleep I get each night. Preferably without any other features (like fitness tracking, etc.) but they're ok so long as I can just ignore them and I don't have to click through several screens to get to the one thing I want.
|
|
#
?
Jan 3, 2023 15:14
|
|
|
Mario posted:Diameter increases by 1.0mm per pass (paper is added to two "sides" of the circle). RPATDO_LAMD posted:Rather than doing it iteratively, layer-by-layer, you can also just solve it numerically by looking at the volume. (or in this case the area of a 2d cross-section, since we don't know how wide the sheets are) Very cool and simple solutions, thank you! I thought I was probably just thinking about this wrong
|
|
#
?
Jan 3, 2023 15:21
|
|
|
|
| # ? Jun 11, 2024 17:42 |
|
|
Tiggum posted:Is there a simple android app that will let me manually track how long I sleep for (ie. I enter in the times I went to bed and woke up)? I don't want it to try to figure out if I'm asleep or not or measure how much I snore or any of that stuff, just let me keep track of when I went to bed and roughly how much sleep I get each night. Preferably without any other features (like fitness tracking, etc.) but they're ok so long as I can just ignore them and I don't have to click through several screens to get to the one thing I want. Google Sheets?
|
|
#
?
Jan 3, 2023 17:55
|
|