
Before posting anything, please review the Physics Forums Global Guidelines.
Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
48,237 
I always wondered why time wasn't more of an issue in thermodynamics. for example, if I have a metal at temperature...

Mar2108 12:45 AM
unica

17 
3,267 
hello everyone
Consider extinction coefficient k, n becomes N=nik.
the text book says NsinA=N'sinB still holds...

Mar2008 10:28 PM
zhanghe

5 
6,986 
The Bernoulli Equation for nonuniform flows have a constant at the kinetic energy term which describes the velocity...

Mar2008 02:47 PM
Link

4 
6,037 
Ok so i have looked and looked for a simple way to under stand how to find drag using the coefficient of drag.
the...

Mar2008 01:34 PM
Cyrus

5 
1,402 
Are "direction of force" and "plane of application" valid concepts in mechanical physics, or are these terms I've made...

Mar2008 01:17 AM
Cyrus

4 
5,010 
Let us charge a capacitor and disconnect it from the battery. Let the capacitance, charge and voltage of the...

Mar2008 12:29 AM
manjuvenamma

5 
1,184 
Hi All!
I was hoping you guys might be able to point me in the right direction...
I'm after a online calculator...

Mar2008 12:07 AM
Integral

2 
10,643 
Hello everyone, I am dealing with a tough problem. I place a pencil on the edge of a table and I hit it. I want it to...

Mar1908 07:22 PM
wysard

15 
2,082 
Hello All,
I have had some interest in the effects of rotating magnetic fields and was doing some research on the...

Mar1908 06:05 PM
Jdo300

0 
1,644 
So, I believe I've got the math part down but, I'm having trouble understanding the theory. Can someone briefly...

Mar1908 04:22 PM
mikelepore

2 
2,888 
Can some one kindly explain or give a reference link that explains why it happens what it happens in electric...

Mar1908 04:10 PM
mikelepore

1 
1,368 
Hello all :)
I'm doing some coursework on eddy current braking atm and I just need to clarify that I have the right...

Mar1908 12:06 PM
Fointy

0 
1,948 
Can anyone tell what the angle of heel means?
(how to calculate it in a barge with a crane)

Mar1908 08:58 AM
Dili

2 
7,024 
Surrounding the planets usually exists the various atmosphere. Due to this atmosphere, one light ray crossing the...

Mar1908 08:10 AM
ZapperZ

4 
2,027 
Hi All,
I would like to know what makes a polarized capacitor to explode. Too much voltage? Tension in the wrong...

Mar1908 06:22 AM
DaTario

2 
1,910 
on the corridor floor the static friction is 2.2N, the dynamic friction is 1.4N
when the corridor floor with water...

Mar1908 05:32 AM
TVP45

10 
2,882 
Hi everyone im very new here so please don' be too harsh with me :shy: I hope I posted this in the right section. If...

Mar1908 03:20 AM
kamerling

4 
1,470 
I'm just sort of looking for some clarification on some of this...
1) Say we have an ideal emf (battery, I...

Mar1908 02:12 AM
mikelepore

4 
1,494 
I have a question about the deduction of First Thermodynamic Law. The book that I have is written by Paul A. Tipler...

Mar1808 04:59 PM
Mapes

3 
3,719 
I am trying to determine the speed of one vehicle involved in an accident. I know the speed of the other vehicle, and...

Mar1808 09:33 AM
Danger

13 
2,017 
Dear all
When I first learned about forces and motion I was taught F=ma in terms of apply a force to a mass and the...

Mar1808 06:43 AM
DaleSpam

50 
5,904 
I got into a discussion about heat sink materials and was beaten up for suggesting that Aluminum is better than Copper...

Mar1708 09:15 PM
Steve_

11 
2,928 
Using a Laze light and curtain far from it 50 m. It is supposed that A is a light centre when having no aberration...

Mar1708 06:06 AM
einsteinooo

4 
1,042 
It is clear that stronger or faster the wind, the more force it exerts on, let say, a house or anything. So, can we...

Mar1708 05:21 AM
hadel

0 
6,472 
This is a followup to the old thread What are the FULL classical electrodynamic equations? which never really provided...

Mar1708 04:49 AM
pellman

7 
2,375 
i was just stumbling across an accelerator patent that is 20 years from the filing date.
linear accelerator / psw /...

Mar1608 09:19 PM
klystronman

0 
1,126 
I've got a great good head for intuiting physics but no post2ndary math.
How fast must a cylindrical space station...

Mar1608 09:02 PM
wysard

61 
8,652 
Can anyone show me the calculus proof of the forces of gravity canceling out inside of a shell of mass? I couldn't...

Mar1608 07:06 PM
woodne

0 
2,197 
For my physics practical coursework I investigated how the rate of revolution of the permanent magnet in an...

Mar1608 06:31 AM
jamhar89

2 
2,902 
Hi, I'm working on some simple aerodynamics for a game. Are there any generic, but fairly accurate, formulas for...

Mar1508 11:59 PM
pantaz

4 
8,464 
hi m a new member here....actually i m in a great confusion....plz solve dis confusion fer me...its related to...

Mar1508 11:41 AM
cristo

13 
1,679 
Hello everybody!
I have a large set of items and, twobytwo, there exists some kind of attraction/repulsion that I...

Mar1508 11:02 AM
jtbell

3 
911 
As part of a local competition, i have to calculate the distance that a projectile launched at an angle from a certain...

Mar1508 09:06 AM
naes213

3 
901 
Okay, so the situation is a hydroelectric plant, assumed to have a vertical inlet pipe, of (s) metres high, and a...

Mar1508 06:57 AM
rcgldr

14 
12,054 
Why dont metal objects such as a nail get charged by friction like the famous comb, plastic rod or glass rod  all...

Mar1508 06:29 AM
pam

4 
3,485 
what's the force acting during stapling?

Mar1508 01:53 AM
cryptica

0 
1,067 
Hey I was just wondering what the differences between the three forms of mechanics were. I've only studied basic...

Mar1508 12:53 AM
Feldoh

4 
4,238 
Why don't we call B magnetic field strength like we call E, the electrical counterpart. In stead we call it magnetic...

Mar1408 11:19 PM
nandan

4 
1,020 
Hello. I have what I hope to be a simple question. It's something that I've come across in several problems in my...

Mar1408 07:32 AM
AussieDave

4 
3,564 
I am working on using a Runge Kutta 4th order code (in the C programming language) to predict a Keplerian orbit in 2...

Mar1308 06:17 PM
D H

3 
7,057 