Search found 9 matches

by shing
Mon Apr 07, 2008 12:07 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0407: "Cheap GPS"
Replies: 99
Views: 24047

Re: "Cheap GPS" Discussion

Hmmm....this got me to wondering if it would be possible to make a real life Tron game with GPS systems...

Anyone more knowledgeable about GPS systems want to weigh in on this idea?
by shing
Fri Jan 11, 2008 7:37 pm UTC
Forum: Mathematics
Topic: Question About the Probability of Test Answers
Replies: 24
Views: 2235

Re: Question About the Probability of Test Answers

Good lord, I seem to have opened up a whole can of worms here.

This isn't really helping me =(
by shing
Thu Jan 10, 2008 8:03 pm UTC
Forum: Mathematics
Topic: Question About the Probability of Test Answers
Replies: 24
Views: 2235

Question About the Probability of Test Answers

I thought up this problem and I can't seem to figure out which is correct, so maybe someone here could help me out. Suppose you had a sufficiently large multiple choice test, like 200 questions or so, with answer choices a,b,c,d, all randomly chosen. Suppose that you were 100% confident in all your ...
by shing
Mon Jan 07, 2008 8:30 pm UTC
Forum: Mathematics
Topic: Help on an integral...
Replies: 3
Views: 1264

Help on an integral...

I need to find the integral of 1 / (4 - 5sin(x)).

Our teacher says it can be done with something that has to do with Weierstrass, then a partial fraction. I've googled all over and can't find anything related to this type of integral and Weierstrass, could someone help me out?
by shing
Sun Dec 09, 2007 12:55 am UTC
Forum: Mathematics
Topic: Math question problem...
Replies: 8
Views: 1642

Re: Math question problem...

Wow...how did you think to use that?

More generally, how do you learn techniques like that? I mean, being a high school student, I obviously understand substitution, but I would never have thought to do a substitution like that.

Does it just come with doing lots of problems?
by shing
Sun Dec 09, 2007 12:40 am UTC
Forum: Mathematics
Topic: Math question problem...
Replies: 8
Views: 1642

Math question problem...

Solve this system for x and y x^2 + y^2 = 130 and ((The cube root of x+y) - (The cube root of x-y)) / ((The cube root of x+y) + (The cube root of x-y)) = 3 Been stuck on this problem for a while...any hints? The first equation is a circle, but I have no idea how to simplify the second one into a usa...
by shing
Thu Oct 11, 2007 12:59 am UTC
Forum: Science
Topic: A Conservation of Energy/Kinematics problem.
Replies: 4
Views: 1851

Re: A Conservation of Energy/Kinematics problem.

v(theta) = v1 + mgrsin(theta)?

I have no idea what your getting at here =(
by shing
Wed Oct 10, 2007 11:51 pm UTC
Forum: Science
Topic: A Conservation of Energy/Kinematics problem.
Replies: 4
Views: 1851

A Conservation of Energy/Kinematics problem.

http://img505.imageshack.us/img505/5849/29366767kn2.gif OK. I've been stuck on this for a while. There is a ball of mass m on a string being swung in a vertical circle. At the top, there is a speed v1, and when it swings to the second place, it has speed v2. The only force on it is gravity. At the ...
by shing
Sun Jul 15, 2007 11:20 pm UTC
Forum: Mathematics
Topic: Can this number exist?
Replies: 8
Views: 2820

Can this number exist?

Can there be a number that contains every possible permutation of digits in its entirety? You would think you could so something like 0-9 and keep adding them on to the end, but what about infinitely long sequences? Would the number be in another category of infinity? What about irrational numbers i...

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