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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,912 
In my experience, a heavier sled rider always goes faster than a lighter one (given the same sled design). When...

Nov312 06:54 PM
Jespermj

15 
1,914 
Hi there. I'm trying to consider a system in which you have an electric field applied by a capacitor over two media,...

Nov312 05:54 PM
DrZoidberg

2 
607 
The title is pretty selfexplanatory. I know the speed of the falling magnet is much slower in a copper pipe, but...

Nov312 12:52 PM
FeynmanIsCool

6 
1,799 
As i understand it, the Maxwell equations in potential form (in the Lorenz gauge) are basically 4 independent wave...

Nov312 11:21 AM
waveandmatter

5 
975 
How could I calculate the analytical form of all the normal modes of a triangular membrane?, asuming the membrane is...

Nov312 10:55 AM
Jhovannoty

0 
529 
Hey guys,
I'm new to this forum so I'm sorry if I posted in the wrong thread. So we did these experiments with van de...

Nov312 08:38 AM
AJ Bentley

1 
480 
Okay there is a particular equation in my book, which I just can't seem to understand intuitively. I've been staring...

Nov212 11:46 PM
pabloenigma

1 
646 
I am reading Jackson's electrodynamics book. When I went through the Legendre polynomial, I have a question.
In the...

Nov212 09:00 PM
Meir Achuz

2 
2,160 
Hello,
does anyone know how to determine the PSF (point spread function) of an optical system? It would be ok also...

Nov212 02:48 PM
mnb96

0 
561 
Two permanent magnets are on the table some distance apart and having some arbitrary orientation relative to each...

Nov212 11:53 AM
tris_d

12 
1,399 
Basically I would like to know how to expand:
\left\langle(N  \left\langle N \right\rangle)2\right\rangle
<(N ...

Nov212 11:15 AM
mfb

6 
841 
Suppose we have a rod standing vertically and then slightly disturbed so it begins to fall. After it falls through...

Nov212 06:27 AM
tinytim

7 
1,579 
Hello friends... Please answer to this question…
Lowest possible temperature is 2730C. Why?

Nov112 07:17 PM
Rap

14 
1,820 
Suppose we consider a car moving on rough road in forward direction, wheels rotating clockwise.
Since wheels rotate...

Nov112 06:38 PM
sophiecentaur

5 
1,228 
Hi
I am doing a project on folded waveguides and I am reading some IEEE papers for literature review. I always...

Nov112 12:12 PM
shpongle

2 
607 
I am trying to self learn kinematics , but i don't understand a certain concept :
If a string hold a mass...

Nov112 10:12 AM
arildno

1 
979 
Can we define specific heat capacity for an adiabatic process ??
Would it always be zero since dQ is 0 for an...

Nov112 12:49 AM
Andrew Mason

2 
2,471 
Hi,
I am having some difficulty doing the integral
∫d^{3}v1d^{3}v2  \overline{v1}\overline{v2}, where...

Oct3112 11:11 PM
babylonia

4 
666 
So I have derived a formula for the range of projectile in a vacuum fired from an arbitrary height h from above the...

Oct3112 08:29 PM
FallenLeibniz

3 
752 
I have an incline A that is very steep reaching a vertical height of h and another one B which is less steep with the...

Oct3112 07:32 PM
haruspex

5 
1,366 
I would like to calculate the energy need for move in the black volume in gas (move in from r2 to r1), when gas is...

Oct3112 05:34 PM
lba

15 
2,755 
I recently read about the communication blackout during a spacecraft reentry.. The reason given was the high density...

Oct3112 10:02 AM
AJ Bentley

1 
803 
Hi everyone.
I am a programmer and I think some basic physics will help me to achieve something I wanted to do.
...

Oct3112 07:50 AM
cubud

5 
1,083 
If we try to treat a nonrelativistic point charge, what force do we need to accelerate it uniformly, when we take the...

Oct3112 07:09 AM
blgeo

5 
1,161 
If 3 spheres have equal masses and the stationary object is in a collision
with a sphere with linear momentum . p=...

Oct3112 06:15 AM
mikeph

6 
995 
I don't really understand how electromagnetic waves in wires are created. Sure you can see from the Maxwell equations...

Oct3112 03:08 AM
Qreeus

43 
3,227 
It is written that:
Another useful form of the equation of state of a real gas is:
Pv= A + B/v + C/v^{2} + ...
...

Oct3012 04:25 PM
M. next

3 
779 
http://en.wikipedia.org/wiki/Lorenz_gauge_condition
I know it's used to simplify the 2 partial differential...

Oct3012 03:57 PM
dextercioby

7 
2,401 
Hi there, I would like to know that if we have an leaning object supported by another object, both are supported by...

Oct3012 03:24 PM
tinytim

1 
1,474 
Classically a single particle will have 3 position coordinates and 3 momentum coordinates, and so it "exists" in a...

Oct3012 12:07 PM
Silversonic

2 
741 
When a plane wave for example is travelling from air>dielectric and we know the power flow of the incident and...

Oct3012 10:39 AM
xnoiz

0 
460 
From what I have read so far, the vapor pressure of a liquid is temperature dependent while it is independent of the...

Oct3012 08:24 AM
mfb

1 
964 
In case of a circularly polarized wave, is the poynting vector also circularly polarized?
If not what happens in...

Oct3012 08:17 AM
Qreeus

2 
807 
As a way to express the complex poynting is F = P + j2ω(Wm − We), whats the magnitude and the phase of it based on the...

Oct2912 08:27 PM
xnoiz

0 
441 
NVM, Wrong section.

Oct2912 11:49 AM
Torald

0 
481 
Please see the attached photo.
I am not sure how to proceed. I do not know Mi or M2, nor do I have enough...

Oct2912 09:09 AM
emKhairol

3 
1,190 
I love physics, but I find that I am ignorant about some of the more basic concepts, so forgive me if this question...

Oct2912 08:53 AM
jtbell

4 
968 
Hello,
I am having difficulty understanding the paragraph in my textbook explaining why no other engine can be more...

Oct2912 08:36 AM
jtbell

2 
991 
hi .. ...
i am entering a sumobot competition..weight limitation 1kg..dimensions 150mm*150mm...what is more important...

Oct2912 04:00 AM
rcgldr

4 
685 
Not sure if I am doing this correct and do not have answer available...
A heat pump takes on 30,000BTU/hr of heat and...

Oct2812 11:41 PM
Andrew Mason

1 
1,005 