EPTAsk and answer stupid questions here! - Page 720
| Forum Index > General Forum |
|
Harris1st
Germany7347 Posts
| ||
KwarK
United States44205 Posts
On March 13 2019 00:11 Harris1st wrote: Damn. Flat earth would be so much easier xD Because the sun would rise in all places at the same time. It’d either be below the plane or above it. | ||
|
riotjune
United States3394 Posts
On March 16 2019 01:40 KwarK wrote: Because the sun would rise in all places at the same time. It’d either be below the plane or above it. That's easy, time zones are FAKE NEWS! | ||
|
JimmiC
Canada22817 Posts
| ||
|
Dangermousecatdog
United Kingdom7084 Posts
On March 12 2019 07:14 KwarK wrote: This reasoning makes no sense to me, and I would say that Japan is on the West side of the Pacific ocean.East is where the sun rises. West is where it sets. If you’re on the Pacific Japan is closer to sunset than sunrise. | ||
|
hellokitty[hk]
United States1309 Posts
She's been laying on my bed for hours. | ||
|
Fecalfeast
Canada11355 Posts
On March 17 2019 03:23 hellokitty[hk] wrote: What does it take to get my gf into the kitchen and cooking a sandwich??? She's been laying on my bed for hours. Have you asked her politely if she will 'cook' you a sandwich? That's what I'd do if I wanted someone else to make me a sandwich. However if you're awake and she's asleep why not make it yourself? | ||
|
KwarK
United States44205 Posts
On March 16 2019 04:31 Dangermousecatdog wrote: This reasoning makes no sense to me, and I would say that Japan is on the West side of the Pacific ocean. The Earth is a ball and a ball does not have any intrinsic top, bottom, sides etc. It’s all the top. However the spin of the earth allows us to add definition to it, suddenly we have two points that are effectively stationary and a band around the middle that is where the spin motion is fastest. This is because a rotation is a fixed time (1 day) but the distance to go around the world varies depending on how far you are from either of the poles. If time remains constant and distance increases then speed increases. Now that our ball is spinning we have some frame of reference that we can apply to it, we have two ends and a middle. We also have directions, upspin and downspin. We named upspin East and downspin West. | ||
|
8882
2735 Posts
Supposedly it is some sort of a restaurant ![[image loading]](https://i.imgur.com/QJzkXRE.jpg) | ||
Liquid`Drone
Norway28875 Posts
| ||
|
Velr
Switzerland10937 Posts
On March 29 2019 02:34 8882 wrote: Is this thing somewhere in South Korea? Supposedly it is some sort of a restaurant This is obviously not a restaurant but skynets hidden weapon project. | ||
|
JimmiC
Canada22817 Posts
| ||
|
Oshuy
Netherlands529 Posts
On March 29 2019 02:47 Liquid`Drone wrote: hope they serve crickets! Railway station café/restaurant named "A grasshopper's dream", Gujeol-ri's railway station near Jeongseon, Gangwon Province, Korea. Pasta in the lower part, café in the higher one. koreatriptips.com You get there by "railway bike" ![[image loading]](http://tong.visitkorea.or.kr/cms/resource/59/2365259_image2_1.jpg) And if you prefer fish you can get some on the same line at the fish restaurant ![[image loading]](http://tong.visitkorea.or.kr/cms/resource/10/618910_image2_1.jpg) | ||
|
JimmiC
Canada22817 Posts
| ||
|
Uldridge
Belgium5201 Posts
Multiplication is an extension of addition and (I don't know if the following is true, but it feels analogous enough in my brain) division is an extension of subtraction (or the inverse of multiplication if I'm wrong about the first). Then we have squaring and exponentiation, which is an extension of multiplication (or an extension of an extension on addition). But I can't for the life of me wrap my brain around what rooting is supposed to be analogous to, or how it works, or how you're supposed to find a trivial way of finding a root number of something out, without just calculating it with a calculator, or, unless it's evident, doing it in your head. | ||
|
KwarK
United States44205 Posts
On March 30 2019 07:43 Uldridge wrote: I kinda sorta can't believe I'm asking this, but: how do square roots, or the rooting operation in general, work? Multiplication is an extension of addition and (I don't know if the following is true, but it feels analogous enough in my brain) division is an extension of subtraction (or the inverse of multiplication if I'm wrong about the first). Then we have squaring and exponentiation, which is an extension of multiplication (or an extension of an extension on addition). But I can't for the life of me wrap my brain around what rooting is supposed to be analogous to, or how it works, or how you're supposed to find a trivial way of finding a root number of something out, without just calculating it with a calculator, or, unless it's evident, doing it in your head. Surely the square root is just “you have X apples, you lay them out in a square shape, how many apples long is it?” It’s a spatial relationship between the area covered (2d) and the width (1D). Lay them out in your mind then measure it. Doesn’t work so well past cubes though. | ||
|
JimmiC
Canada22817 Posts
| ||
|
Uldridge
Belgium5201 Posts
But what about numbers that aren't perfect squares? I know how to divide 42 by 7; I don't know how what the square root of 42 is, other than it being somewhere between 6 and 7. @JimmiC Roadrunner, definitely, because he doesn't have a huge hat on. Now, if Speedy would only want to lose his hat, we'd be in for a really interesting race! | ||
|
Acrofales
Spain18400 Posts
On March 30 2019 09:16 Uldridge wrote: Shit, I didn't think about the spatial organization and the "length" of a side of a square of squared items. But what about numbers that aren't perfect squares? I know how to divide 42 by 7; I don't know how what the square root of 42 is, other than it being somewhere between 6 and 7. @JimmiC Roadrunner, definitely, because he doesn't have a huge hat on. Now, if Speedy would only want to lose his hat, we'd be in for a really interesting race! There are numerical approximation methods for non-integer roots. Some are rational numbers, but I remember that the proof that sqrt(2) is an irrational number is actually quite elegant. Anyway, the basic concept of the root is simply the inverse of the exponent, just as division and multiplication are each others inverses, and addition and subtraction are. The nth root of x to the power n is simply x itself. In KwarK's example, the surface of a square surface is the square of its sides, hence the name. Inversely, if you know the surface area, the length of its sides are the square root of the area. Similar for cubes and volume. | ||
|
Atreides
United States2393 Posts
On March 30 2019 09:16 Uldridge wrote: Shit, I didn't think about the spatial organization and the "length" of a side of a square of squared items. But what about numbers that aren't perfect squares? I know how to divide 42 by 7; I don't know how what the square root of 42 is, other than it being somewhere between 6 and 7. @JimmiC Roadrunner, definitely, because he doesn't have a huge hat on. Now, if Speedy would only want to lose his hat, we'd be in for a really interesting race! ya in general the nth root of x is just equal to y such that y^n=x. As long as you are conceptually ok with 'exponentiation' its not fundamentally any different. The fact that it is somewhat difficult to calculate is kind of irrelevant. Division is much more difficult to calculate than addition/subtraction as well. In your example you happen to pick an example for division thats an even integer. Its equally irrelevant to say 'i know how to take the sqrt of 49 it is 7, I don't know exactly what the 49 divided by 11 is except its roughly between 4 and 5... Or you say it is 4 and 5/11. and strictly speaking someone else might break down 42 similarly to its 'smallest parts' and say the sqrt(42)=sqrt(2)*sqrt(3)*sqrt(7). Visually this is finding squares of various sizes that span the diagonal of your original sqare corner to corner. | ||
| ||
