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Why am I hating physics? It's mechanical, so intro stuff, but I enjoy math, I'm taking differential equations and am having a good time there. I also love astronomy, I've taken a number of courses on it, so I would imagine that physics would be enjoyable too. But I'm having a really hard time caring, what can I do to change my perspective? I have to take two other physics classes after this one so I'm in it for the long haul.
>>7906534I'll give him a go, I learn best my hearing the same thing from different people. I've met a couple people in my physics class, I guess I could make an effort for us to meet up, though they don't strike me as A students so that kind of turns me off to them. Though maybe I could use that as an opportunity to make sure I know my stuff by explaining it to them.>>7906540That's cool, an instructor can make all the difference when it comes to someone's opinion on a subject. Seeing as how you're teaching an intro class, do you have any suggestions for which topics to look out for that might require more time than others? Or is there a subject students tend to trip up on? Thanks for taking the time to help me out, I appreciate it.
>>7906552No prob. Students almost always have to hardest time with Kinematics. It involves a lot of algebra (that's easy to screw up) and lots of thinking (because of so many reference frames in a problem). Once you get through Kinematics and into Force/Energy it becomes a lot more forgiving. Many of the numerous problems you may have studies in Kinematics can actually be solved really quickly by utilizing force balance equations, or, even easier, energy conservation laws. The real "goal" is to understand what the different laws mean, not just study and memorize equations. I will say that the majority of students who try to memorize (because they're trained to at this point) don't have very good chances of passing the classes. When you can read a problem and work it out in your head, you know your going the right direction.
>>7906398Because you haven't found the joy of variational mechanics
>>7906565Ah I see, interesting. Right now I'm not having an issue with the math since it's pretty basic compared to multivariable calc and diff eqs, but I'm having a hard time recognizing when certain laws apply. I'm sure the more I practice though the more it'll become obvious.
>>7906576As far as I'm concerned, that's the only way to do it. Things will "click" in the process.
I'm sad... I seen a problem on facebook (the one in the pic), and, holy fuck, only like 1/50ish get it... It makes me sad to think about public education in this country, and the world at large...I answered it in 1 minute, I'm sure you guys can do the same... Why the fuck do people find this so hard?
>>7896669May 19th can be eliminated immediately because of the statement, "I know that Bernard does not know". If there was a possibility of Albert being told May, then the unique number would render his statement false. We eliminate May entirely because of this, likewise June for the unique number 18. This leaves the possibility that Albert was told July or August, but when Bernard says that he now knows, July 16 is the only one that fits for both.
>>7896913When's your birthday?July 16th.What year?Every year!
>>7897872This is the correct answer. Cheryl will not get guests to her party, and not get any presents or cards. Cheryl is just too high maintenance and a bit of a jerk.
>>7896572This is so poorly worded it makes it arbitrarily more difficult.
>>7896572July 16th has my voteBernard does not know -> The month does not contain a unique number (19 only shows up in may, 19 shows up only in june, so those are out)So it is July or AugustBernard now knows that he is in either july or august, so he knows its July 16, August 16, or August 17.Now it gets trickyAssume it is August. Then Albert will not know, as he still has August 16 and 17. So it can't be augustAssume it is july. Albert knows only July 16 is possible so he knows the date!! XDD
I was brought up to believe>the moon landing was fake>9/11 was a holographic hoax>earthquakes are caused by HAARP>the earth is flat>the earth is hollow>the Nazis secretly colonized the darkside of the moon>Roswell incident covered up existence of aliens>We can't go to space because theres nothing in vacuum for thrust to push against>big pharma suppresses many important cures for profit>academia are suppressing free energy and cold fusion>climate change is a scaremongering hoax to increase taxes and economic growthAm I a lost cause or is there still hope to come back to reality?
easy solution, anon
>>7906577>>the earth is flat>>the earth is hollow>the moon landing was fake>the Nazis secretly colonized the darkside of the moon>We can't go to space because theres nothing in vacuum for thrust to push against
>>7906577But all of those things are true
>>7906582I'm being serious guys. I don't know what to believe anymore. I don't know how logic works
Which one is better for increasing focus/intelligence and the ability to handle day to day tasks?
>>7906542>let us not exaggerate when you can take it in big concentrations its pretty fucking close. it cost me 30$ for the box, and i've bought 20$ worth of juice. if you get a sturdy set up and not some wanna be cigarette looking thing, they last about as long as any other electronic device. couple years i'd say if you don't have to replace the batteries. i don't pull on my vape indoors unless i'm in my place. i treat it pretty much like a real cig and nobody cares.
>>7906557nicewhat is a sturdy set up? the cigarette looking thing looks like shit
>>7906560>what is a sturdy set up?one that you build your own. you can buy all the parts online. was half the reason i started doing it.
>>7906566whoa whoadon't tell me I will need to read a 2 hour tutorial to know the parts are the bestI just want some cancer free nicotine not play dwarf fortress
>>7906572then you might spend a bit more money at the start. just look around for something rugged that has replaceable batteries and you'll be good. the less bells and whistles the better.
Hey /sci/, so I found a bottle of mercury in my physics classroom and i touched it with my pencil. Then I touched the same pencil with my fingers.Am I going to die?
>>7904602>>7904679Weeaboos are a burden on society.
>>7904596mercury and dimethylmercury are not the same thing
>>7906395No need to be so hostile, anon.I wasn't the poster who said one drop would kill you.I also meant dimethylmercury.
>>7906420What the fuck did you just fucking say about me, you little bitch? I’ll have you know I graduated top of my class in the Navy Seals, and I’ve been involved in numerous secret raids on Al-Quaeda, and I have over 300 confirmed kills. I am trained in gorilla warfare and I’m the top sniper in the entire US armed forces. You are nothing to me but just another target. I will wipe you the fuck out with precision the likes of which has never been seen before on this Earth, mark my fucking words. You think you can get away with saying that shit to me over the Internet? Think again, fucker. As we speak I am contacting my secret network of spies across the USA and your IP is being traced right now so you better prepare for the storm, maggot. The storm that wipes out the pathetic little thing you call your life. You’re fucking dead, kid. I can be anywhere, anytime, and I can kill you in over seven hundred ways, and that’s just with my bare hands. Not only am I extensively trained in unarmed combat, but I have access to the entire arsenal of the United States Marine Corps and I will use it to its full extent to wipe your miserable ass off the face of the continent, you little shit. If only you could have known what unholy retribution your little “clever” comment was about to bring down upon you, maybe you would have held your fucking tongue. But you couldn’t, you didn’t, and now you’re paying the price, you goddamn idiot. I will shit fury all over you and you will drown in it. You’re fucking dead, kiddo.
>>7906452I don’t give a fuck who you are or where you live. You can count on me to be there to bring your fucking life to a hellish end. I’ll put you in so much fucking pain that it’ll make Jesus being nailed to a cross in the desert look like a fucking back massage on a tropical island. I don’t give a fuck how many friends you have or how tough you are IRL, how well you can fight, or how many fucking guns you own to protect yourself. I’ll fucking show up at your house when you aren’t home. I’ll turn all the lights on in your house, leave all the water running, open your fridge door and not close it, and turn your gas stove burners on and let them waste gas. You’re going to start stressing the fuck out, your blood pressure will triple, and you’ll have a fucking heart attack. You’ll go to the hospital for a heart operation, and the last thing you’ll see when you’re being put under in the operating room is me hovering above you, dressed like a doctor. When you wake up after being operated on, wondering what ticking time bomb is in your chest waiting to go off. You’ll recover fully from your heart surgery. And when you walk out the front door of the hospital to go home I’ll run you over with my fucking car out of no where and kill you. I just want you to know how easily I could fucking destroy your pathetic excuse of a life, but how I’d rather go to a great fucking length to make sure your last remaining days are spent in a living, breathing fucking hell. It’s too late to save yourself, but don’t bother committing suicide either… I’ll fucking resuscitate you and kill you again myself you bitch-faced faggot. Welcome to hell, population: you
https://www.youtube.com/watch?v=8YmLWnQGZhQhttps://www.youtube.com/watch?v=HNLPXzlz6-I>while true that dna of most host mammals is incompatible with other species dna it has been theorized that if a sufficient quantity of sperm (like i dunno a full fucking syringe) was dilivered directly to an embryo in sufficient quantities regardless of what species it has a small chance that it will impregnate it and begin the cycle of cell replica....imagine what we could do if this sort of thing wasn't taboo
>>7905842In other words, the semen does nothing.same shit would happen without it.
>>7905842I don't think they're chicken embryos, they would at least look recognizable. I think its simply a little puppet with strings
>>7905842>If you buy an egg from a store, given right condition a fucking little chicken will start to develop>EGG EMBRYOS are already impregnatedThis is not really true. Aren't store eggs not fertilized? I assume the the russkii right there took some eggs from his babushka, which are not guaranteed to be unfertilized
>>7905740I wonder what will happen if I shoot cum onto caviarWill """"artificial lifeforms"""" develop as well?
>>7905740The fucking end though:BLYAAAT *THUD*
Hey /sci/first time posting here. I thought I´d come here with my question.I´m not familiar with the etiquette or answer-rate/trolls of this board. Would be nice if you could keep it at least kind of serious. (it´s 4chan after all.)I work as a bartender and yesterday our daily gains were exactly 1.426,70 €.Thing is, the day before the sum was exactly the same. Down to the cent.Now we were wondering how high the probability of this happening would be.I thought that the probability of having this exact sum one time would be: 42.000,00 (cause ~4.200,- € was the highest sum we ever had, 0,- € being the lowest possible. Multiplying it by 10 because calculating with cents.)times1.120(Thats ~4 years * ~280 workdays. Meaning the possibilities of us billing a sum of money)42.000 * 1.120 = 47.040.000Question is: How do I calculate the probability of billing the same ammount of cents twice in a row.Thank you.>TL;DR bartender wondering about math>nice pic in return
Hate having to resort to this, but I need help /sci/, my lecturer is dogshit and after trying for 2 hours I don't know whats the right approach for deciphering this:7ECC555AB95BF6EC605E5F22B772D2B34FF4636340D32FABC29B73CB4855BE44F6EC60594C2BB47997B60EEE303049CD3CABC29B64C6401BAF45F6A930435F3DF875C4E102F8742A45C824AFCA9B7AC24F5EAF17F0A0754D5834BC3CC3A90ABD7B2A52C222ABC89B72C24A52B550B3B8624D4F22F86BD2B30ABD642C498122A1D29B73CC5457BF17E7A4750C5423B178D0A44FFF756355C03CABC28A74CC0155B443B3A8795F4224AA7E97B507F2632606CF3FA0D59BIts a one-time pad cipher that uses the same key for each sentence, what the fuck do I do?
>>7906554>I cant fuckin do it...
>>7906520>same key for each sentenceis it still a one time pad if its used more than once ?
>>7906554>>7906521>>7906520I'm not saying it's okay to ask for homework help, but, out of curiosity, what have you tried to do so far? What hasn't worked? If you legitimately don't know what to do, the least you can do is trial-and-error.
>>7906561This is basically what we had to work with as our lecturer just did a brief overview >a XOR a -> 0>a XOR 0 -> a>ciphertext XOR key -> plaintext>plaintext XOR key -> ciphertext>somehow were supposed to know what to do>how is frequency analysis even used here.jpg
>>7906568Uhh, I believe its one key applied to several sentences, but its a multi-pad key I guess>>7906569Basically, what ive deduced is that, somehow with multiple repeats I should be able to find the key (assume theres only one key else its impossible to crack). What i've done is used "pattern matching" essentially, ive taken many high frequency occurring words such as "the", "then", "and" etc and basically XOR'd them against TWO cipher texts which have been XOR'd i.e XORing a random plaintext hex value with m1⊕m2(in hex)Im just stuck, cause I dont think what I did is an efficient approach (even though it apparently worked for someone on crypto exchange)
ay guys,I'm in that situation. We've all been there. I have a midterm in a week, and I don't know my shit.however, the class is Real Analysis (rudin's book) and the school is UC Berkeley.it's a really harshly curved class, with a lot of smart kids. how do I do it? how do I pack 6 weeks of Rudin into one week? I'm about half-way to where I should beI) Adderall?2)no sleep?3) ???
>>7903213>how do I pack 6 weeks of Rudin into one week?fucking KEK
>3) ???3) Drop the class and start over next semester and don't fucking wait until the last minute, you fuck
>>7906256>Rudin is a memePretty much. I checked out Tao's books from my library and aside from the Peano memes it was a nice no bullshit presentation. Other sources I used have been Rosenlicht and Gamelin and Greene for the topology side. As an aside it's really Rudin's Chapter 2 that is the killer, the rest of his sections are not that bad, although his chapters on Several Variable Functions and thru Lesbegue integration should be consulted elsewhere.
>>7906256OP is not self-study. OP's professor is using it
>>7906274I'm self studying and I find Rudin a pretty good reference.The worst problem is I always feel like I have to prove lemmas for every proof he writes.The current open pages of my notebook have his proof on one side and a unsolved lemma on the other
Can someone prove this?
>>7906524Why don't you calculate it you faggot?Literally up to [math]10^{-100}[/math] error, or even less.
>>7906553I need prove, i don't need answer
>>7906524sum=0for i=2016:-1:1sum=(sum+i)^(1/i);endsum=1.91163921625
>>7906562>I need prove a stupid algebraic equationyou brought this upon yourself you stupid mathfag.
>>7906524[math] 1 < \sqrt[n]{n} < 2 [/math][math] 1 < \sqrt[n]{n+2} ≤ 2 [/math]
Ok. I was just thinking. What do you think would happen inside the mind of a psychopath if they became self aware of their psychopathy at a young age. The appropriate term for a child would be callous unemotional but you get my point. What if some how a teenager(let's say 14) becomes aware that they are different and figure out they are callous unemotional. What do you think they would do? Would they think of it as cool or beneficial and try to further their skills or would they become confused as to why they are that way and develope a longing for an emotional connection? What if they do long for an genuine emotional connection? Would they ever succeed? Just a general food for thought conversation thread.
>>7906418That and due to the lack of emotional connections, psychopaths will speak of others like game pieces without realizing it. To a psychopath, everyone around them are just tools to achieve their own personal objects. Humans aren't conscious to a psychopath, just machines that do certain things when you give certain inputs.
>>7906333They wouldn't really care one way or another.
>>7906373Not necessarily. IIRC the Psychopath has the ability to form relationships that can and often time do last. The sociopath will not though. the psychopath often is of higher intelligence and companies like the fortune 500 ones will seek out psychopaths, but it's the total opposite for a sociopath. >>7906380
>>7906476> IIRC the Psychopath has the ability to form relationships that can and often time do last. The sociopath will not though.nope, other way around m8. source: Abnormal Psychology by Kring, Johnson, Davison, and Neale
>>7906438>>7906418>>7906407>>7906386>everyone around them are just tools to achieve their own personal objects. Humans aren't conscious to a psychopath, just machines that do certain things when you give certain inputs.I've never met another human that doesn't use other humans for their personal gain. Are all humans psychopaths? Of course not. Psychology is a pseudo-science. All people are selfish, it's not a disorder unless it hurts you, which ironically, can in many cases include having a conscience and "being a good person", if your strategy doesn't have an end-game where you win. See for example, Sweden. Does not wanting to die make you insane? I would submit that it's impossible to be "too selfish", as long as selfish just means making sure your genes are passed on for an infinitely long period of time, the decisions you make in your life, your strategy ensures the longest lineage possible. To be clear, if you don't have children, and just stare at the mirror all day, that is a superficial, pathological selfishness, not true selfishness. This is instinctual, but in public, most people won't admit that they are selfish because it's an easy strategy to appear selfless because it temporarily decreases the chances of people seeing you as an aggressor, becoming threatened, and trying to hurt you preemptively.
What are the most important problems in your field? Are you working on one of them? Why not?
>>7905379I am working on it, but I won't tell you what it is. You'll find out soon enough, and if you don't then may God help us all.
>>7905379peeling oranges
>>7905452Me too! But every time I go to write up results, I get stuck on some dank memes.
>>7905379In astrophysics? Fuck man, there's a lot of shit, I'm working a lot on galactic gravitational interaction simulations, which is probably, depending on the help we get from the particle autists, going to get us some answers on Dark Matter, so yeah, pretty important problem I guess...
>>7905448Cu/Ni/Cr plated plastic is pretty much the automotive industry standard, mang.
>>7906494Btw,you guys can download my thread herehttp://quadchan.com/just put in the link
>>7906494It was a good decision making this thread
>>7906522
>>7906536This is my last cosmology one.Turns out most of the other ones I have are too big :(
>>7906539its cool
why do subsaharan africans often cannabalize eachother? is it related to them having an avg iq of 70?
>>7906408Is the raid starting up again?