Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
PleaseInsertACoin
Question on reflection/bounce in 2D?
This is actually pretty simple, but I can't quite seem to be able to wrap my head around this:
I want to resolve a collision by letting the object "bounce" of the surface the collision took place.
I do have the normal vector of the surface the collision took place on, as well as the speed of the object as a vector. All of this takes place in 2D.
I know that supposedly the incoming angle would equal the outgoing angle, but somehow I don't quite *get* how to calculate the new speed vector. Any help would be appreciated.
1 AnswerPhysics10 years agoGenesis 1 lolcat vershun?
Boreded Ceiling Cat makinkgz Urf n stuffs
1 Oh hai. In teh beginnin Ceiling Cat maded teh skiez An da Urfs, but he did not eated dem.
2 Da Urfs no had shapez An haded dark face, An Ceiling Cat rode invisible bike over teh waterz.
3 At start, no has lyte. An Ceiling Cat sayz, i can haz lite? An lite wuz.4 An Ceiling Cat sawed teh lite, to seez stuffs, An splitted teh lite from dark but taht wuz ok cuz kittehs can see in teh dark An not tripz over nethin.5 An Ceiling Cat sayed light Day An dark no Day. It were FURST!!!1
6 An Ceiling Cat sayed, im in ur waterz makin a ceiling. But he no yet make a ur. An he maded a hole in teh Ceiling.7 An Ceiling Cat doed teh skiez with waterz down An waterz up. It happen.8 An Ceiling Cat sayed, i can has teh firmmint wich iz funny bibel naim 4 ceiling, so wuz teh twoth day.
9 An Ceiling Cat gotted all teh waterz in ur base, An Ceiling Cat hadz dry placez cuz kittehs DO NOT WANT get wet.10 An Ceiling Cat called no waterz urth and waters oshun. Iz good.
11 An Ceiling Cat sayed, DO WANT grass! so tehr wuz seedz An stufs, An fruitzors An vegbatels. An a Corm. It happen.12 An Ceiling Cat sawed that weedz ish good, so, letz there be weedz.13 An so teh threeth day jazzhands.
14 An Ceiling Cat sayed, i can has lightz in the skiez for splittin day An no day.15 It happen, lights everwear, like christmass, srsly.16 An Ceiling Cat doeth two grate lightz, teh most big for day, teh other for no day.17 An Ceiling Cat screw tehm on skiez, with big nails An stuff, to lite teh Urfs.18 An tehy rulez day An night. Ceiling Cat sawed. Iz good.19 An so teh furth day w00t.
20 An Ceiling Cat sayed, waterz bring me phishes, An burds, so kittehs can eat dem. But Ceiling Cat no eated dem.21 An Ceiling Cat maed big fishies An see monstrs, which wuz like big cows, except they no mood, An other stuffs dat mooves, An Ceiling Cat sawed iz good.22 An Ceiling Cat sed O hai, make bebehs kthx. An dont worry i wont watch u secksy, i not that kynd uf kitteh.23 An so teh...fith day. Ceiling Cat taek a wile 2 cawnt.
24 An Ceiling Cat sayed, i can has MOAR living stuff, mooes, An creepie tings, An otehr aminals. It happen so tehre.25 An Ceiling Cat doed moar living stuff, mooes, An creepies, An otehr animuls, An did not eated tehm.
26 An Ceiling Cat sayed, letz us do peeps like uz, becuz we ish teh qte, An let min p0wnz0r becuz tehy has can openers.
27 So Ceiling Cat createded teh peeps taht waz like him, can has can openers he maed tehm, min An womin wuz maeded, but he did not eated tehm.
28 An Ceiling Cat sed them O hai maek bebehs kthx, An p0wn teh waterz, no waterz An teh firmmint, An evry stufs.
29 An Ceiling Cat sayed, Beholdt, the Urfs, I has it, An I has not eated it.30 For evry createded stufs tehre are the fuudz, to the burdies, teh creepiez, An teh mooes, so tehre. It happen. Iz good.
31 An Ceiling Cat sayed, Beholdt, teh good enouf for releaze as version 0.8a. kthxbai.
3 AnswersReligion & Spirituality10 years agoLaptop Acer Aspire 5940G - upgrade GPU?
Specs here: http://icecat.us/p/acer/lxpfq02088/aspire-series-n...
Specifically, I want to upgrade my GPU from an ATI Mobility Radeon 4650 to another ATI card of at least the Radeon 5000 series. The reason being lack of support for OpenGL 4 / DirectX 11 in my current one. The problem is that my hardware knowledge is very limited, and I'm not sure about all the things I need to consider doing this. This is purely about the choice of the specific GPU, not about the process of replacing it - I plan to let this be performed by a professional anyways.
Basically, I know that power consumption and heat production matters and stuff like that, but I can't really judge if my laptop meets the requirements of any specific GPU. Also I am sure that there are other things I need to consider as well that I may not know about. While performance of the GPU is only secondary to me, of course I'd like to get the fastest one that I can still fit in there.
So the specific question would be, what GPU's could I use with this laptop that fulfill the requirement of having OpenGL 4 support?
I am looking forward to your replies.
1 AnswerLaptops & Notebooks10 years agoWhat is it with this "Belief is free will" crap?
You can not choose what you believe in. You believe in what you think is right and you don't believe in what you think is wrong. If you had other criterias for believing in things you would be insane. We do not "choose" to not believe in your god, we just don't.
13 AnswersReligion & Spirituality10 years agoCan any of the people who know Jesus?
Please tell him to come over and talk to me? That's all it takes for me to believe in him really, and I was told he wants me to. Shouldn't be too much to ask.
16 AnswersReligion & Spirituality10 years agoThe religious "Real or Poe" Game?
Judge the asker of the following question.
1 means a genuine christian
5 means a christian impersonation
and anything between obviously varying degrees of certainty. I honestly can't tell, maybe someone else can clear this up.
5 AnswersReligion & Spirituality10 years agoWould adding LaTeX support to Y!A really be asking for too much?
repost of http://answers.yahoo.com/question/index;_ylt=AhbV2...
I mean, seriously, the Greasemonkey Script "TeX The World" gets it done in 250 lines of JS, and that's including vertical whitespace and comments. Writing and reading formulas without LaTeX support is a huge pain, especially in the science sections. The problem is that not everyone uses firefox, has greasemonkey AND the script installed, so support from Yahoos side would be great - star if you agree.
(for those who don't know LaTeX, it's a language that allows us to express formulas, graphics, tables and the like with tags that can then be rendered to graphics Codecogs has a latex editor that doesn't require any plugins, but linking to codecogs all the time is quite cumbersome.
An example:
[;\sum_{i=1}^{100} \frac{(a+\sqrt{b})^{2}} {b}*C_{i};]
could be visible in Y!A as this:
http://latex.codecogs.com/gif.latex?\sum%E2%80%A6
if there was latex support. As I said earlier, it already is if you have greasemonkey and the right script installed, but this place shouldn't rely on third party solutions so much.
PS: Yes I realize that Tex The World uses codecogs for rendering which Y!A obviously couldn't for legal reasons, but with a company of the size of Yahoo I don't think that getting an own latex renderer - or purchasing the one of codecogs - would be such a big deal.
1 AnswerYahoo Answers10 years agoWould LaTeX support really be asking for too much?
I mean, seriously, the Greasemonkey Script "TeX The World" gets it done in 250 lines of JS, and that's including vertical whitespace and comments. Writing and reading formulas without LaTeX support is a huge pain, especially in the science sections. The problem is that not everyone uses firefox, has greasemonkey AND the script installed, so support from Yahoos side would be great - star if you agree.
(for those who don't know LaTeX, it's a language that allows us to express formulas, graphics, tables and the like with tags that can then be rendered to graphics Codecogs has a latex editor that doesn't require any plugins, but linking to codecogs all the time is quite cumbersome.
An example:
[;\sum_{i=1}^{100} \frac{(a+\sqrt{b})^{2}} {b}*C_{i};]
could be visible in Y!A as this:
http://latex.codecogs.com/gif.latex?\sum_{i=1}^{10...
if there was latex support. As I said earlier, it already is if you have greasemonkey and the right script installed, but this place shouldn't rely on third party solutions so much.
1 AnswerOther - Science10 years agoNeed help making sense out of this (dynamics)?
I'm currently reading a series of articles about rigid body dynamics, and while it's mostly written very comprehensible, there was one example I didn't quite get. It isn't necessary for understanding the article, but it did bother me so I'd be glad if anyone can help me with this.
There was an explanation of what ordinary differential equations are, and as an example he used air friction as a force that is proportional to the current speed:
f = -v
I don't understand how you can equal a force and a velocity, seeing that they express different things. The continuation didn't make it clearer either:
f = ma = -v
a = dv/dt = -v /m
I mean I get the part where it's solved for a, but there was still a force on the left hand side and a velocity on the right hand side. What does that mean? Is that some sort of "equals" sign that just takes the numerical value and ignores the units on either side? Can anybody enlighten me on this? I do feel kinda stupid about it, as it wasn't explained it's probably something simple that can be assumed common knowledge, but I personally have never seen an equation that looks like that.
(and I know this isn't really a physics problem, but it's not really a mathematical problem either and I had to put it somewhere)
3 AnswersPhysics10 years agoFundamentalist christians: Is Mans sin also responsible for...?
australian bees massacring each other?
2 AnswersReligion & Spirituality1 decade agoWhy do people keep saying Santa Clause doesn't exist?
If that was true, who is that guy?
3 AnswersReligion & Spirituality1 decade agoChristians, do you really have to ask why your faith is growing in unpopularity lately?
"Dude, these Idiots don't believe in God
I wish God would burn them for ever in hell"
Hard to hear the "love" here.
6 AnswersReligion & Spirituality1 decade agoAlright, so, this christian decided god is not omnipotent, do you agree?
http://answers.yahoo.com/question/index;_ylt=AsVO3...
He says god is completely unable to create a world without bad things in which free will exists.
If so, I'll have to ask what your heaven is supposed to be.
4 AnswersReligion & Spirituality1 decade agoWhy do so many christians think that...?
... "You shall not take the name of the Lord your God in vain" means you are not allowed to make jokes about god? I mean, we don't even believe in god, and do you really think he has such a weak humor that he can't appreciate it? Have you ever thought that it could just mean that believers should not use the name of god to justify evil doings? Cause that sounds more like a sin than making harmless jokes does.
(Just writing this because I keep seeing "christians" ticking out at every god joke with something like "YOU M0CKED GOD SO NOW YOU GO TO HELL BURRRRNNN")
6 AnswersReligion & Spirituality1 decade agoWith MinGW, which libraries do I have to link to create win32 applications?
Well, as the question said. If I try to link my program I always get a "undefined reference to CreateSolidBrush@4" error. I am using MinGW 4.4.1.
1 AnswerProgramming & Design1 decade agoHave you ever seen Mr. Deity?
Warning, if you are a member of the abrahamic religions, this might feel insulting or anything, so I'd have to ask you to think of it as the joke it is.
4 AnswersReligion & Spirituality1 decade agoDoes being the cousin of the grandson of a rapist make you immoral?
If not, please stop using this stupid "We are related to enemies thus we have no morals" bull.
6 AnswersReligion & Spirituality1 decade agoWould you accept medical treatment from a doctor that doesn't understand the word theory?
I was shocked when I found out Geoffrey Simmons actually has had an education. The University of Illinois must be, or at least have been very liberal to let such a guy pass. I always thought basic biology was general knowledge for doctors.
3 AnswersReligion & Spirituality1 decade ago