# Search results

1. ### Integration Problems

Integration Problems!! Help! I have a problem with the following: 1. Sketch the graph of the function y^2 = x^4(x+4) and find the area enclosed by the loop. -- I don't see any loop! 2. Find the area of the region enclosed by th curves y= x^2 and y^2=8x. -- The answer given in the back is...
2. ### Females are not dumb I just need help

Since one male in the class thinks the two females in my IB physics class are dumb (I being one of them), we are determined to do very well on tonight's problems. We don't have a teacher that actually teaches, I don't know how to approach some of the problems. Here is goes (please help! thanks)...
3. ### Math Question

I'm in IB math methods, working on a project and I can't seem to figure out what to do with this problem. A radio transmitter sends signals to a railway which run along a straight track. When a set of coodinate axes is used to represent this system, the transmitter is at R(1,0), and the track...
4. ### Mathematica Mathematical Proof?

Mathematical Proof??? Can anyone tell me how to prove things mathematically? I'm not sure you can because I'm convinced that proving equations and formulas is something that you just see how to do if you are intelligent (if that is the case, then I must be stupid). I have trouble with this in...
5. ### Is angular momentum of the planet conserved?

What is it meant by: mr(1)V(1)= mr(2)v(2) The quantity mrv is called the angular momentum of the planet. Is angular momentum of the planet conserved? What do they mean conserved?? Thanks and sorry such short notice... my physics teacher soooo nicely gave us 2 days notice to finish all...

Hi, I'm back with another question (IB Math Methods). It's kind of easy and I don't know if I'm stupid or having a brain lapse but it is this: When finding the inverse of h(x) = (/sqrt{x-1}), x > -1, I got y = x^2 + 1, but what do I do with that x > -1 ??? THANKS!
7. ### IB Physics I

Hi, I'm in IB physics and I'm having a little trouble since the teacher would rather play computer games than teach us (the book isn't great either). Right now we're working on force and I was wondering if anyone could clarify a few things for me please.I'll just work through some problems and...
8. ### IB Math Methods- Problems with Problems!

I have a few problems: Solve 1. 32^2x = e e^2x +1 I cross multiplied and got 3e^2x = e(e^2x + 1) Then: 3e^2x = e^2x+e And now I don't know what to do from here.... 2. Solve e^2x - 5e+x + 6 = 0 This one can't be factored, so does the quadratic equation work here? If so...
9. ### Geometric Sequences and Logarithms

I'm having trouble with these type of probles (where a negative log comes up): (All of this is solving without sigma notation) Find the number of terms in these geometric sequences and the sum of the numbers. 11, -22, 44,....,704 I know that a1 = 11, r = -2, and an = 704, so I did...
10. ### IB Math Methods questions

I've been working on these problems for a long time trying to prove to myself that I'm not stupid (though I am convinced I am because I don't feel like "IB material" at the moment), but this will be impossible since I have other things to do. So, my two questions are these: 1. An arithmetic...
11. ### Blackbody Spectrum

Why is it bothersome that the universe has a blackbody spectrum?
12. ### Quantum Mechanics

How do you feel about Quantum Mechanics?
13. ### Space Program

Ok, this is a really stupid question, but it's just killing me for some reason. What do you call the person who leads a shuttle launch? I need help quickly!
14. ### Science; A Big Mistake?

Could it be possible that everything we "know" is wrong? Every law of physics and every discovery that was discovered could be incorrect because the foundation of our science was flawed. Perhaps now, everything seems to be making sense, but maybe one day, we will "get stuck" as we get deeper in...
15. ### The One Single Event that will Cause the Collapse of Physics

In thought experiments that I have done, I've always thought that there was another universe that is sort of an inverse to ours. It is composed of antimatter (it has "reversed" gravity-a force that repels) and its laws of physics are governed by imaginary numbers (i). If these two universes...
16. ### About null and timelike geodesics

Can you explain a little more about null and timelike geodesics (I think that's how you spell it)? I was reading Hawking and Penrose's The Nature of Space and Time, but it got a little technical. I would really like to know more about these though.... thanks!
17. ### The Sun's G-Force

What is the g force (anomaly) of the sun? I tried to calculate this one using Newton's equation. I did this: [(6.67 * 10^-11)(2 * 10^30)]/(0.7 * 10^6) Where F = GM/r^2 ( I think), but I got 272244898, which seems really wrong. I can't find it anywhere online and I'm trying to figure out...
18. ### Spanish Help!

I'm not supposed to know any of the stuff I'm about to ask yet, but due to my extreme need to "know," I have to ask. Thanks! Could anyone give me examples of the pluperfect (in indicative and subjunctive), imperfect (in subjunctive), the "pretérito anterior" (I guess that means anterior...
19. ### Does anyone speak Spanish?

Quiero saber si alguien habla español aquí porque siempre me encanta hablar en español para practicar (Soy una estudiante de español II). Dígame si entiende éso, porque quiero hablar con usted.
20. ### Geometric Sequences and Series

I'm trying to get an A in honors AlgII/Trig and it is impossible, but I won't give up, so I have a few questions. I'm not sure how to find the first two terms of a sequence (I got a few right, but most wrong and I don't know what's wrong). One of the problems is: a5 = 20; a8 = 4/25. I set...