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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,744 
I was thinking of this following example:
Consider you charge a capacitor to its max with a battery, now replace...

Mar1112 11:48 AM
RobinSky

7 
1,321 
A pendulum of length, b, and bob with mass, m, is attached to a massless support moving vertically upward with...

Mar1112 12:10 PM
OldEngr63

3 
982 
Hello everyone,
I saw this video in youtube: http://www.youtube.com/watch?v=cRJv6z_bxQg
And I have some questions,...

Mar1112 05:08 PM
dislect

1 
924 
Stumbled across an old journal a few weeks ago that suggested the equation of state for a solid could be written:
V...

Mar1112 07:05 PM
JackPunchedJi

2 
704 
What exactly does it mean when the determinant of a Jacobian matrix vanishes? Does that imply that the coordinate...

Mar1112 08:07 PM
Hassan2

2 
1,095 
http://i209.photobucket.com/albums/bb176/hypernihl/figure.png
So, I've modeled the interaction between two...

Mar1112 11:17 PM
hypernihl

0 
681 
There is a saying that two kind of waves are generated when an explosion happens. one moves slow which can carry the...

Mar1212 02:11 AM
aim1732

1 
1,042 
Why do we always talk about the Carnot cycle as being the most efficient, ideal engine? Doesn't the same equation hold...

Mar1212 05:58 AM
Opus_723

0 
611 
I just read that Centrifugal Force is a false force. It does not exist. Inertia (which is not a force) is mistakenly...

Mar1212 05:59 AM
tinytim

2 
787 
Where did the concept and equation of work come from? It was introduced in Physics 1 with absolutely no background or...

Mar1212 06:04 AM
Lsos

17 
1,893 
If i have a shaft & i'm applying a driving torque D at one end & at other end there is resisting torque R due to...

Mar1212 07:54 AM
Hassan2

5 
1,408 
hello! we got this experiment,
R1= 46.8
R2= 46.8
R3= 148.9
R4= 147.7
R5= 217
RT= 71.1
as we can see, r1...

Mar1212 10:16 AM
stardust006

2 
645 
Disclosure: I am studying biochemistry so my thermodynamics education is lacking and I'm likely misinterpreting some...

Mar1212 12:42 PM
Andrew Mason

5 
1,680 
Hello!
My book here states that for a medium where the index of refraction n increases with increasing frequency (or...

Mar1212 01:11 PM
marcusl

5 
1,742 
This is a thought experiment I, erm, thought of.
Imagine a cylindrical (upright) office building with a central...

Mar1212 03:19 PM
H2Bro

3 
996 
I get the proof with the velocity as a function of time graphic.
I don't get why that is...
E.G.
Why does...

Mar1212 03:25 PM
Ken G

3 
1,061 
I often hear about collisions in terms of impact force. For instance, "the boxer delivered a punch with 100 lbs of...

Mar1212 03:30 PM
dan28029

1 
1,117 
I guess my tittle is self explanatory, but I see energy's concept of relativity not of "ability to do anything".
if...

Mar1212 04:35 PM
Drakkith

3 
1,737 
What exactly is the radius of curvature of an object? And how would this be applied to a question such as the...

Mar1212 04:49 PM
Drakkith

1 
675 
I'm having some trouble understanding this concept. Why is it that you sometimes can get heat for free from the...

Mar1212 05:31 PM
aaaa202

0 
645 
I am trying to find a servo or stepper motor that is powerful enough to rotate a Tippmann A5 paintball when it is...

Mar1212 06:44 PM
bjmontalvo

0 
726 
Hi everyone,
From what I understand if you had a time varying magnetic field inside a dielectric it will induce a...

Mar1312 07:18 AM
BMPaul

1 
987 
i m little confusd in (finding the shortest distance b/w two points is a straight line in three dimensions)i have...

Mar1312 08:52 AM
sncum

10 
1,158 
Hello,
Thanks in advance for helping me with my question! I'm so excited to find this physics forum of such...

Mar1312 11:39 AM
jim hardy

7 
3,112 
I have a friend who insists in an idea and I want to prove to him that it cannot work because it would violate basic...

Mar1312 12:35 PM
berkeman

2 
1,043 
Two waves are perfectly superposed (traveling same direction), but are 90 degrees out of phase. Does this result in...

Mar1312 12:58 PM
chrisbaird

6 
4,445 
Geostationary satellites need to be in equatorial plane.
Now my first doubt is what exactly is the equatorial...

Mar1312 05:43 PM
emailanmol

11 
2,920 
Hey guys.
If a body is spinning around the z  axis and an element of that body detaches on its own and flies off...

Mar1312 09:51 PM
SmoothCat

2 
1,141 
Hi guys,
What im trying to do is to create a mathematical model for the attraction forces between two or more...

Mar1412 03:20 AM
normad

0 
871 
Hello,
I'am new here and having some troubles with understanding the difference between 2 related subjects.
I...

Mar1412 06:01 AM
HWGXX7

7 
2,255 
Hi guys!
Was wondering if anyone was confident with Fresnel equations for a refractive index interface. From what I...

Mar1412 07:03 AM
vanhees71

1 
1,042 
Why is the boltzmann distribution for a collection of atoms independent of their total energy? (it only depends on...

Mar1412 11:48 AM
aaaa202

2 
967 
I'm trying to understand what happens with beating light when the componenets have differing polarisation.
I know...

Mar1412 01:53 PM
reasonableman

2 
1,323 
Hi again!
So, this time I have a ball with a mass m that I throw down from some point with a height h.
I want...

Mar1412 03:05 PM
emailanmol

3 
1,146 
I still dont understand why these types of motors tend to spin in one direction or another. In theory the direction of...

Mar1412 03:49 PM
rcgldr

2 
1,394 
I am confused about the some of the concepts behind fluid statics. Here is an example to illustrate this, using...

Mar1412 04:02 PM
Undoubtedly0

2 
1,579 
So far my friends and I figured out that we will take a solution of chlorophyll, carotene and something else, then...

Mar1412 05:33 PM
Drakkith

2 
824 
Is there a formula for finding out how fast, let's say, a less dense oil will travel to the surface of water, or...

Mar1412 06:09 PM
Ralphonsicus

0 
796 
If a car is going around a 360 degree circle at 1 g (its maximum centripetal acceleration, and its maximum total...

Mar1412 07:45 PM
JimEd

18 
1,641 
Hello,
I was wondering if someone knew if it was physically possible to have a 2x1 optical wave guide combiner...

Mar1412 08:49 PM
narra

8 
1,347 