
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
45,360 
So I'm doing some signal processing and I want to take a signal and find the frequency components and so I need to do...

Aug1410 06:05 PM
SuperNomad

0 
4,737 
how i can integrata function with parameters thats limits have parameter 2 in maple?
please help me

Aug1410 05:13 PM
g_edgar

3 
1,116 
Hi there,
I was looking for something to levelup my knowledge from basic differentiation/integration (I'm a...

Aug1410 07:36 AM
eumyang

3 
1,806 
hello,
How do i find a Distribution Function based on Measurements?
Y.S

Aug1410 02:12 AM
Yulia_sch

2 
756 
Traditional oarlocks used in compeitive rowing hold the oar next to the oar pin about which the oar pivots such that...

Aug1210 09:13 PM
rickhoran

3 
1,732 
Hi everyone,
Just started studying Real Analysis and I have some questions. If I ask anything stupid please excuse...

Aug1210 03:45 PM
abiyo

14 
1,897 
how would i plug this into the calculator? to find the sum?
step by step process? thankss!
4
∑ 2 cos (π/k)
k = 1...

Aug1210 11:53 AM
Coriolis314

3 
3,649 
This is not homework. I ran across this question in a book store a few minutes ago and cant seem to finish it...
R=...

Aug1210 11:48 AM
Coriolis314

2 
1,014 
Hi,
If you have a cone (right angle) with radius r, slant lenght l, how is the central angle theta = 2*pi*r/l?
...

Aug1210 10:42 AM
ivan77

1 
1,951 
Hi Everyone,
I just registered for PF today because this problem was driving me nuts and I was hoping to get some...

Aug1110 08:39 PM
adriank

1 
1,306 
Is is possible to solve every real integral and come up with an actual solution? perhaps we may have not just found...

Aug1110 09:34 AM
FallenRGH

4 
985 
This is annoying me beyond comprehension.
What precisely does one mean by writing:
 \frac{dP}{dA} for a power...

Aug1010 08:46 PM
Sify

8 
1,447 
Can anyone help me about analytical solution of this Integral?
the integral is written in the word file attached...

Aug1010 05:41 PM
Ashkan

2 
1,567 
If you have a sequence of integrable functions \{f_n(x)\} on which converges to a function f(x) pointwise for every...

Aug1010 12:50 PM
adriank

4 
991 
What is the relation between the flux through a given surface by a vector field? And how does stokes theorem relate to...

Aug1010 07:13 AM
HallsofIvy

1 
844 
How would you go about confirming the Gauss theorem using cylindrical coordinates? Could it be just like Cartesian...

Aug1010 03:51 AM
Petr Mugver

3 
1,621 
Hi,
I saw this identity
e^{ \alpha r} = \frac{ \alpha }{2 \sqrt{ \pi } } \int_0^{\infty} \beta^{3/2} e^{...

Aug1010 02:53 AM
Comanche

0 
950 
why we postulate dxdy=dydx
not dxdy=dydx?
i am now studying exterior differential forms and i always feel that...

Aug910 07:29 PM
owlpride

8 
4,341 
E = \int \frac{Gm_1m_2}{r^2} dr =  \frac{Gm_1m_2}{r}
The answer is there, but how do you get that (especially how...

Aug910 06:17 PM
FallenRGH

6 
1,029 
Hi everyone,
In theory of FRET (Forster Resonance Energy Transfer). For experiment, we need calculate the overlap...

Aug910 04:16 PM
katsiusa

0 
1,235 
I'm not sure if this is the right place to post this. Let me say, this is not for any homework.
I've been asking...

Aug910 12:05 PM
statdad

5 
2,599 
Hi
I am not sure if my interpretation of the following derivative is correct.
N = I / R  D
Where , N, I and...

Aug910 10:33 AM
Mark44

5 
1,054 
Where can i find the proof of dirac's function properties?

Aug910 08:51 AM
arildno

6 
1,319 
Hi, i am stuck in integration of a complicated functions which is as,
...

Aug910 08:45 AM
HallsofIvy

5 
961 
Suppose a function f(k) has a power series expansion:
f(k)=\Sigma a_i k^i
Is it possible to inverse Fourier...

Aug810 02:12 AM
vigvig

2 
1,130 
Hi there,
I am reading an introduction on solving ODE, there the exact equation is mentioned. Suppose a ODE is in...

Aug710 12:55 AM
owlpride

1 
3,795 
Why division is not possible between vectors?
We have seen in many books that there is vector addition, subtraction...

Aug610 03:14 PM
adriank

3 
1,764 
Hello physicists!
I'm a comp sci student and I am trying to graphically model a simplified version of the solar...

Aug610 01:42 PM
doonzy

0 
1,621 
Does the derivative of zero equal to zero make any sense?

Aug610 08:30 AM
TacTics

11 
11,530 
Hi All,
How do we go about showing the euler's number e converges ?
Recall that
e =(1+1/n)^n as n >infinity...

Aug610 08:12 AM
HallsofIvy

9 
4,704 
http://ocw.mit.edu/courses/mathematics/18152introductiontopartialdifferentialequationsfall2005/lecturenotes/le...

Aug510 09:43 PM
Gregg

2 
928 
Does anyone have an idea to solve this seri ,containing the bessel function of first kind?

Aug510 11:27 AM
mrtnoshad

0 
588 
how this function f(x)= 0^{x}
should be understood? , if x is NEGATIVE, we find no problems, since 0 raised to...

Aug510 10:38 AM
Petr Mugver

2 
694 
Hello,
do you have a hint on how to solve this limit?
\lim_{x\to +\infty}(\sqrt{x^2+ax+b}\sqrt{x^2ax+b})
...

Aug510 08:09 AM
mnb96

2 
1,051 
Dear all,
Is there a method to find the maximum and minimum dimension of an irregular closed loop? This is a...

Aug410 03:37 PM
elgen

1 
1,094 
I've tried and searched for a long time, and I haven't been able to prove or find a proof that the following sequence...

Aug410 05:32 AM
Gib Z

3 
7,374 
This isn't a homework question, although I am in a calculus course. I'm a little fuzzy on the method that I was taught...

Aug410 03:20 AM
Theorem.

4 
1,765 
I have been trying to understand and articulate why I can't do the following. Please confirm or point out...

Aug310 03:47 PM
Nick R

0 
1,024 
This is a beginner's question: what does that hat about the H (Hamiltonian) symbol signify? One often sees it in the...

Aug310 06:41 AM
jcsd

5 
2,093 
Dear all,
I am puzzled by the derivation of the Lennard Jones 93 model. Many articles mentioned that the Lennard...

Aug310 05:52 AM
Casey Jay

0 
3,144 