Stupid Definition and 314 Threads

I'm kinda confused about atoms. Basically when particles came into existence, they were affecting other particles so they were being "seen", which would allow them to have a position so they could come together to form atoms, right? I'm so confused about atoms after learning about...

Is this the correct way to use the Tabular Method for \int x^2e^{-5x}dx repeated diff: x^2 2x 2 repeated Integration: e^{-5x} -\frac{1}{5}e^{-5x} \frac{1}{25}e^{-5x}...

[SOLVED] Stupid Buoyancy, this is getting ridiculous. A hollow sphere of inner readius 8cm and outer radius 9cm floats half submerged in a liquid of density 800kg/m^3. What is the mass of the sphere and the density of the material it is made from. \sum F=0 \Rightarrow mg-F_b=0 \Rightarrow...

So, I find myself without the AC adapter for my laptop and I need power. My adapter is rated 19.5v 4.7a. I have an adapter from an older machine (same manufacturer), rated 19.5v 3a. The physical connection to the laptop is the same. Will I damage the laptop and/or the battery if I...

Personally i don't think evolution is stupid. I was watching a documentary with this title out of interest. You can watch the full documentary here: h**p://tv-links.co.uk/video/9/5566/8296/53218/76984# (If you copy and paste the link and replace the *s with ts it should work, if not...

grad students that should know things by now (like me!): [though in my defense, I have not had any GR yet, only what I've picked up in some books] My 2 questions: The effect of our time distortion from being near the Earth is cool and all, can I assume we have a similar GR effect from...

So I was reading a journal article and I saw the phrase "electrostatic wave", and I became somewhat disgruntled and ranted a little bit to the guys I share an office with, since the phrase is seemingly an oxymoron...'electrostatic' implies a time invariant field and therefore a 'wave' cannot be...

It's one basic question about nuclear disposal that I have never understood. Nuclear "fluel" like Uran, etc comes from nature - right ? The way nuclear fuel is produced is by increasing the consentration of nuclear material - right ? As the nuclear fuel is used and energy is taken out...

Hi everybody, I have a question concerning a "stupid" thing i did today. I found a electric multimeter (if it is called so- you know, the device that measures dc current, the resistance in Ohms, dc and rms of ac voltage...), and thought to measure my body resistance. I didn't even think that...

I just want to make absolutely sure, but does anyone know if you actually do weigh less in a plane, and if you do, is it measurable? Obviously a flying aeroplane, and not one on the ground ;) Thanks! Jess

I don't know how to tackle this question as I was absent from class the day it was taught but I need to know: A quadrilateral has vertices P(0,8) Q(-4,4) R(2,-2) and S(6,4). Find the perimeter of the figure whose vertices are the midpoints of the sides of the quadrilateral.

Sorry folks, I couldn't find the "newb" section for this undoubtedly stupid question. I started reading the wikipedia article on photons, and it states that a photon is massless. My understanding was that all light is photons, but also that light is affected by gravity. It was also my...

Ok thhe follwoing questio is extremely silly. everything else that I've read in the book makes sense but this part doesn't. i just can't seem to udnerstand it because of a combination of stupidity and notation. Near the end of page 69 an identity is derived to show how the components of the...

Problem as stated: -A refrigerator is approximately a uniform parallelepiped h = 7 ft tall, w = 4 ft wide, and d = 2 ft deep. It sits upright on a truck with its 4 ft dimension in the direction of travel. Assume that the refrigerator cannot slide on the truck and that its mass is 110 kg. For the...

Really funny and stupid articles, good humor though: http://www.theonion.com/content/opinion/im_prepared_to_do_anything_to" http://www.theonion.com/content/node/53191"

Q=CV for a capacitor. The Q is for the amount of charge on one plate right(for parallel capacitor case)? So is the total charge 2Q on the capacitor? Does it always have +Q on one plate and -Q on the other? Will it ever happen when it's +Q on one plate and not -Q on the other or vice...

I'm wasting paper today because I have to throw away the homework which has scribbled-in curses, rants, insults to the grader, etc. Does anyone else have this problem? "This problem is useless." "This is obvious. Why do I have to write this out?" "Only a moron would use this notation." &c...

Hey! I finally got something I wanted to get done. You guys are the first to see the website. I won't be publishing the link to the website for another 2 weeks. This is my comic strip that I write at my university. I write one issue every week. The website contains an extra one at that...

When thinking of what's the philosophy behind the "magic" complex i, i*i=-1, this seems the connection between real world and imaginary world, but what this imaginary world stands for? why with its help, many functions get resolved? and we can use the Euler formula, which is the basic of many...

I just came home from a local math league, and I completely let my team down by making a mistake on what is quite possibly the easiest problem I've ever seen, even in junior high (we're in high school): Find the sum of all multiples of 9 less than 50. I thought, for some reason, that 54<50...

Just read http://www.alertnet.org/thenews/newsdesk/N19303337.htm", which conveys the message that the war in Iraq is going so badly, that the suicide rate has doubled. However, this is simply a Poisson distribution, and the values they list do not seem to indicate that the mean value has...

How can I stop a program from minimizing to the system tray? THere's probably an easy answer to this, and yes, I googled it.

But how does one become a homework helper or science advisor?

http://www.usatoday.com/money/industries/energy/2006-12-01-nat-gas-usat_x.htm To be fair, the article isn't terrible, but it does have several "duhs" in it. The headline on the main page, though, is rediculous: First, the obvious: fuel prices follow very regular cyclical patterns during...

Teacher said "Stupid Question" We were learning about Dirac's relativistic equation. The teacher wrote on the board: Free Particle Dirac Equation: [ \alpha \cdot \bold {p}c + \beta mc^2]\psi = -\frac{\hbar}{i}\frac{\partial\psi}{\partial t} Then the teacher said "if we want to add a...

Hello everyone. How does one get a theory "out"? Let's say I have theory, but I'm not a trained physicist. I can't write out my theory as a mathematical equation. I can simply put it in words. How can I get someone trained in physics to look at it and tell me whether I'm smoking crack...

In interval notation, I was asked to solve for 5 < 2x - 1 ≤ 15 I did this by making the 4 cases... 2x-1>5 or 2x-1<-5 AND 2x-1≤ 15 and 2x-1≥-15 x > 3 or x < -2 AND x ≤ 8 and x ≥ -7 So for my final answer...i got [-7,-2),(3,8] But when i check it, none of the numbers between -7 and...

I have no idea how to type math symbols into here so it's all in the PNG attached. I'm probably kind of dumb for not getting this but... I understand that 1) & 3) are true. And the 2) is not right, as it means all x are members of F and true for P(x) when we mean all x that are members of...

A particle of mass m is moving under the ocmbined action of the forces -kx, a damping force -2mb (dx/dt) and a driving force Ft. Express the solutions in terms of intial position x(t=0) and the initial velocity of the particle. For the complementary solution, use x(t) = e^(-bt) A sin (w1t +...

I've read the chapter but it hasn't helped. Eigenstates are states with a definite amount of energy independent on time? and then any other state is a linear combination of the eigenstates, with some Cn acting as a weighting factor...is there a limitation on what the Cn's can be? otherwise...

Why is it that everytime i decide to stick around after jeopardy, i get to be fascinated at the stupidity of some wheel of fortune contestants. When they have a very long puzzle... especially with a jackpot thingy... why is it that they solve soooooo early in the round? Theres maybe... 1 in 20...

Is it possible to have 2 global minimums? I'm just having trouble determining whether this quartic has minimums or not =/

a 500kg hot-air balloon takes off from rest at the surface of the earth. the nonconservative wind and lift forces take the balloon up, doing 97000 J of work on the balloon in the process. At what height above the surface of the Earth does the balloon have a speed of 8.00 m/s? I stared at this...

http://www.lileks.com/institute/frahm/index.html (browse around... be sure to see the next ones too, its pretty funny) just some quotes i liked...

If a TOE is discovered, is physics over? Will there be nothing worthwhile left to study?

My prof has inflicted us with his infinite wisdom in that calculators are stupid because they can only do a certain series of things they're programed to do. Based upon that principle, he's also inflicted the following problem upon us, of which my groupmates and I have no idea how to even get...

Hello everybody...it,s showtime:redface: :redface: why care for studying and being a serious scientist when you can make millions and fame by saying nonsenses?...heeere..we are our list of "Dumb & Dumber" of modern times... Bible secret codes:=oh yeah¡¡..yes you don,t need to get a...

I can't believe i got two parking tickets last week. Can you seriuosly be fined for having your car go a foot over the white lines that mark out your space? I guess so because I did. I was notified of my second parking ticket in a rather humorous way. I got it wednesday night but didn't notice...

I think the heading pretty much says it all! I want to write a python program and I am typing it in Notepad. when I save it, it adds .txt to my filename "myprogram.py". How do I avoid that? (I know, it's a stupid question!) Pat

errors that I make commonly are ANNOYING. Examples: Forgetting to add or multiply something, and just using 1 number, forgetting the other number completely Sign-switching (Negatives lost/added) Basic arithmetic errors out of haste And so on. What's a good way to help lower the...

For the life of me I can't remember the past tense of "to meet", as in "to meet with". And you know, this IS my native language. :frown:

:smile: :smile: :smile: :smile: :smile: :smile: :smile: :smile: I'm going to be like this guy on dr phil! He put a chip in his son's car that tracked his speeds and he went ~103mph 3 times. Son's response? "blahb lah blah waaaa waaaa waaaa" "All my friends do it" "I'm driving...

Well I'm almost 18, and I don't know what I want to do yet but something to do with either psychology or science, I'm really interested in science. Please, please read my accuont, www.myspace.com/spacetimecont. I have no friends. No one wants to hang out with me. If I talk about what I like...

Well I'm 17, and my car insurance billf or full coverage is around 260 dollars a month. I cannot afford this. I have no job, and my parents are paying for my car insurance now, they said that if I get a job I could pay for it, but they will not let me do it since it is so expensive (its...

I'm working on this project that involves air drag. The model for the air drag is given as: \vec F_d = \frac{1}{2} C \rho A v^2 I'm using Newton's Second law in relation to this force and gravity (in one dimension) which yields: a = \frac{1}{m} \left( -mg + \frac{1}{2} C \rho A v^2...

Ok...well, here goes: Let's say we draw a slope-field for \frac{{dy}}{{dx}} = \frac{x}{{k - y + \sqrt {x^2 + \left( {k - y} \right)^2 } }} --------------------------------------- Now, let's say a ray of light traveling in the direction \left\langle {0, - 1} \right\rangle "hits" one of the...

You drive a car at a speed of 40 km/hr to a place and then 60 km/hr back... what is the average speed of the car. I feel really stupid for asking this but its really making me mad..

I'm starting to think that all the money spent on political commercials for the upcoming propositions on the CA ballot could easily pay off the debt California has... nay, the entire country has. I just checked a spurt of commercials and out of 7 commercials, 4 were commercials about the...

An object starts at time t = 0 with a velocity of v0 = +50 m/s and undergoes a constant acceleration of a = -11 m/s^2. b) How far from its starting (t = 0) position is the object at time t_1? I get 44.5 meters. it sounds right 'cuz the equation would mean 0+50*1 - 11/2 *1^2 = 44.5 meters...

This question's going to sound really stupid, but here goes: what letter is this supposed to be? I just came across it in a book of mine, but for the life of me, I can't tell whether it's a scripted R, n, or even pi. If I had to guess, I'd say that it's an n, simply because it looks somewhat...