Search found 1186 matches

by Sizik
Sat Jun 20, 2009 4:57 am UTC
Forum: Science
Topic: Speed bump generators
Replies: 13
Views: 1750

Re: Speed bump generators

Zhatt wrote:What about hybrid cars? The breaking power that would normally be used to charge the batteries is now being stolen by this device because now you need to break less.

Wouldn't breaking less be a good thing? Repair shops can be so expensive nowadays.
by Sizik
Thu Jun 18, 2009 6:26 am UTC
Forum: Language/Linguistics
Topic: Words that you are sure exist, but can't find
Replies: 225
Views: 80101

Re: Words that you are sure exist, but can't find

Continuing the tales of woe...I got marked down in a paper once for using the less common meaning of 'saw' ?? What is the less common meaning? I was wondering if it may be to use a saw (the tool) upon something, but I can't see how a teacher could have marked them down unless they used it in an obv...
by Sizik
Thu Jun 18, 2009 6:11 am UTC
Forum: Mathematics
Topic: Real-world examples of -x * -y = +z
Replies: 66
Views: 7238

Re: Real-world examples of -x * -y = +z

-(-12) 12 This is the step we're discussing. I don't see the relevance of the other stuff you wrote; it's neither a proof nor an intuition, since it depends on a quirk of notation. I sort of skipped a step there. Rather thinking of -(-12) as (-1)(-12), think of it as 0 - (-12). Subtracting a negati...
by Sizik
Tue Jun 16, 2009 5:58 am UTC
Forum: Science
Topic: Football (US) Physics
Replies: 20
Views: 2517

Re: Football (US) Physics

tbone694 wrote:with respect to to the ground
by Sizik
Tue Jun 16, 2009 3:23 am UTC
Forum: Mathematics
Topic: Real-world examples of -x * -y = +z
Replies: 66
Views: 7238

Re: Real-world examples of -x * -y = +z

One thing I noticed is that adding a zero onto the left of a number (or right, if you have a decimal point) does not change a number's value. For example, 4 = 04 (and 4.9 = 4.90 (unless you're a scientist)). The same applies to negative numbers, as -4 = 0-4. Therefore you can treat negative numbers ...
by Sizik
Fri Jun 12, 2009 4:51 am UTC
Forum: Science
Topic: Where do mad scientists hang out?
Replies: 20
Views: 2863

Re: Where do mad scientists hang out?

mamerong wrote:They're mostly mad engineers, if you think about it.

No, the mad engineers build self-assembling automatic sentry guns and ammo dispensers, usually using any available scrap metal. Mad scientists build doomsday devices.
by Sizik
Sun Jun 07, 2009 8:25 am UTC
Forum: Science
Topic: Homemade pepper spray? (Among other chemical weapons)
Replies: 5
Views: 2197

Re: Homemade pepper spray? (Among other chemical weapons)

Tobasco sauce + water + spray bottle?
by Sizik
Sun May 31, 2009 1:16 am UTC
Forum: Science
Topic: The First Self-Replicator?
Replies: 10
Views: 1557

Re: The First Self-Replicator?

Proteins are as 1-D as DNA is, being a straight line sequence of amino acids that is just tangled up in 3D space. They're like a tangled knot of string.
by Sizik
Fri May 22, 2009 5:46 am UTC
Forum: Science
Topic: Have you ever wished a particular theory didn't work?
Replies: 59
Views: 5288

Re: Have you ever wished a particular theory didn't work?

I wonder what it'd be like to live in a world without causality. I suppose it'd be like trying to determine the order of cars driving around in an infinite parking lot instead of on an infinite one-way highway.
by Sizik
Fri May 22, 2009 12:42 am UTC
Forum: Mathematics
Topic: My friend thinks that you can divide by zero.
Replies: 35
Views: 4963

Re: My friend thinks that you can divide by zero.

If 1/0 = \infty , then \infty\times0 = 1 (this is the definition of division). So: \begin{eqnarray} 0+0 & = & 0 \\ \infty\times(0+0) & = & \infty\times0 \\ \infty\times0 + \infty\times0 & = & \infty\times0 \\ 1 + 1 & = & 1 \\ 2 & = & 1 \end{eqnarray} ...
by Sizik
Thu May 21, 2009 6:09 pm UTC
Forum: Mathematics
Topic: My friend thinks that you can divide by zero.
Replies: 35
Views: 4963

Re: My friend thinks that you can divide by zero.

Just use that to prove that 2 = 1. If that doesn't work then you're friend is beyond help. That only works if 0/0 = 1, not if 1/0 = \infty . a = b = 1 a = b ab = b^2 ab - a^2 = b^2 - a^2 a(b - a) = (b + a)(b - a) The next step is to divide both sides by (b - a), leaving a = b + a, but that doesn't ...
by Sizik
Fri May 15, 2009 6:49 am UTC
Forum: Language/Linguistics
Topic: expressions/turns of phrase tha you love . . . share the joy
Replies: 52
Views: 6521

Re: expressions/turns of phrase tha you love . . . share the joy

I used to dislike "the exception that proves the rule" until I knew what it meant (if there weren't a rule, you wouldn't have to make an exception).
by Sizik
Sun May 03, 2009 6:01 am UTC
Forum: Language/Linguistics
Topic: Euphemisms
Replies: 55
Views: 6962

Re: Euphemisms

Bobber wrote:I was watching Soylent Green when I heard another one: locate as a euphemism for find. "I can't locate it!" really just means "I can't find it!" in most cases - saying locate just makes you sound less senile.


That's a synonym, not a euphemism.
by Sizik
Fri Apr 17, 2009 3:50 am UTC
Forum: Mathematics
Topic: Definition of algebraic number
Replies: 16
Views: 1387

Re: Definition of algebraic number

Hackfleischkannibale wrote:strawberries are nuts

I think a better comparison would be saying that oranges are berries.
by Sizik
Tue Mar 17, 2009 11:22 pm UTC
Forum: Mathematics
Topic: Irrational numbers don't exist
Replies: 51
Views: 5634

Re: Irrational numbers don't exist

chapel wrote:To paraphrase Douglas Adams: If you manage to convince yourself that black is white, you kill yourself at the first zebra that walks by.


Just to clarify, the exact quote is "[Man] goes on to prove that black is white and gets himself killed at the next zebra crossing."
by Sizik
Tue Feb 24, 2009 1:12 am UTC
Forum: Mathematics
Topic: Homework: I am stuck regarding Geometric Mean in Triangles
Replies: 11
Views: 827

Re: Homework: I am stuck regarding Geometric Mean in Triangles

Internetmeme wrote:I can't use the Quadratic Formula, because the 36 would become negative moving it over to make the equation equal to zero, or can I?


You can.
by Sizik
Sat Dec 20, 2008 5:34 am UTC
Forum: Mathematics
Topic: On the capabilities of functions
Replies: 25
Views: 2512

Re: On the capabilities of functions

MartianInvader wrote:If you don't like sin(x) but you're okay with imaginary numbers, you could always try e^{ix} - e^{-ix}... don't worry, it always gives you a real answer. Heh heh heh.


That should be [imath]e^{ix}+e^{-ix}[/imath]
by Sizik
Thu Nov 13, 2008 3:29 am UTC
Forum: Science
Topic: ÿ
Replies: 67
Views: 5340

Re: Faster than the Speed of Light-Without violating relativity

You can't talk about scientific theories lacking scientific education without mentioning Neal Adams and his expanding earth theory . I've had a (nominally) similar idea that, because gravity is acceleration, perhaps the Earth is actually expanding outward at 9.81 m/s. Of course, this would imply th...
by Sizik
Sun Oct 26, 2008 7:01 pm UTC
Forum: Gaming
Topic: You gotta get into Dwarf Fortress if you haven't already.
Replies: 4583
Views: 621388

Re: You gotta get into Dwarf Fortress if you haven't already.

Awia wrote:What do I do with a lone art_image-10.dat file when I download a save, I can't for the life of me get it to work.


I believe you can do exactly nothing with just that.
by Sizik
Mon Oct 20, 2008 3:11 am UTC
Forum: Mathematics
Topic: Trig functions, derivation, and calc homework
Replies: 5
Views: 1011

Re: Trig functions, derivation, and calc homework

Ah, I get it now. Still, it kinda seems like they just pulled that out of nowhere.
by Sizik
Mon Oct 20, 2008 1:54 am UTC
Forum: Mathematics
Topic: Trig functions, derivation, and calc homework
Replies: 5
Views: 1011

Trig functions, derivation, and calc homework

One problem in my AP Calc homework is as follows: tan y = x Find dy/dx implicitly and find the largest interval of the form -a < y < a such that y is a differentiable function of x. Then express dy/dx as a function of x. So I got dy/dx = cos 2 y Interval is -pi/2 < y < pi/2 y = tan -1 x, so dy/dx = ...
by Sizik
Sat Oct 04, 2008 3:13 am UTC
Forum: Mathematics
Topic: University Calculus Bonus Problem
Replies: 16
Views: 2021

Re: University Calculus Bonus Problem

Assuming that Alice and Bob each get the piece the other didn't pick, I'd say the maximum cake Alice can get is 1.9999, as she cuts an infinitesimal slice off of each cake and Bob, not wanting any cake to begin with, takes the 0.0000001 slice of cake.
by Sizik
Fri Sep 26, 2008 11:51 pm UTC
Forum: Science
Topic: Total energy of an ideal fluid in a pipe...
Replies: 11
Views: 992

Re: Total energy of an ideal fluid in a pipe...

I believe the energy goes into pushing the fluid in front of it further down the pipe.
by Sizik
Tue Sep 16, 2008 2:34 am UTC
Forum: Mathematics
Topic: Divisibility rules
Replies: 6
Views: 2200

Divisibility rules

I was wondering to myself the other day, "How come if you add up all the digits in a (base 10) number, you can tell if it's divisible by 3 or 9?" So I did some thinking about it and came up with these: Simple divisibility rules for a whole number x in base n. (n being a positive integer): ...

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