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

Apr2211 05:26 AM
ZapperZ

1 
41,685 
How would I show that during quastatic isothermal expansion of a monatomic ideal gas, the change in entropy is related...

Apr710 05:24 PM
Peashooter

1 
6,536 
I know an argument that i don´t like. It say´s:
If there were electric field inside a conductor in electrostaic...

Apr810 04:00 PM
Firefox123

11 
17,974 
Could someone explain the equation describing Thermal Noise?
The equation is given by
\overline{\left(\delta...

Apr610 04:21 PM
mchi5se2

5 
5,503 
I've been scouring the web in search of a Joule Thomson coefficient value for methane, but so far no luck.
I have...

Apr610 01:49 PM
gooogallybear

8 
10,661 
Hi guys, I have an extremely simple conceptual question. According to my textbook (in a problem), "if you start a coin...

Apr910 04:59 PM
noamholz

2 
2,048 
Hi everyone!
I have a small question that bothers me. Consider a test particle in the Earths gravitational field on...

Apr710 06:11 AM
MartinK

1 
1,096 
what is 'black radiation' ? or specifically, the meaning of the phrase "radiation in equilibrium with matter".....in...

Apr510 11:34 PM
samreen

5 
996 
I know that the iron core of a solenoid will result in a higher magnetic field than a hollow core when a current is...

Apr610 10:36 PM
Syrtd

2 
1,380 
Can someone explain to me please why this concept is useful ?
I can't make sense out of it, am struggling...
...

Apr710 07:20 PM
Mazerakham

21 
2,053 
I want to compute the maximal acceleration of a car in a curve.
a_{total}=a_{c}^{2}+a_{tan}^{2}...

Apr710 11:08 AM
jack action

13 
2,004 
I am working on a vehicle based computer game. The focus right now is to get the internal physics of each drive line...

Apr610 12:37 PM
ricky.helgess

2 
743 
In a linear birefringent crystal, if light enters parallel to a face that has been cut so that it is at an angle to...

Apr810 06:01 AM
jrlaguna

5 
1,666 
Hello,
In "An Introduction to Thermal Physics" Schroeder goes to deduce that for any quasistatic process: W = PdV...

Apr710 08:09 AM
nonequilibrium

4 
1,386 
hello all,
Recently I have been attempting to model a spring system (see below) where the springs themselves will...

Apr910 01:33 PM
sleventh

2 
962 
Okay here goes, I've read different things online about charging a capacitor so I just want to clear this up once and...

Apr610 01:12 PM
david888lee

12 
1,581 
I have a couple of questions about the stress tensor. I am not an engineering student, so this is the first time I...

Apr610 01:36 PM
Andy Resnick

12 
1,372 
i have a question about induction and how it works, what i want to know is the why, not the what or the formulas i...

Apr610 10:36 PM
DaleSpam

8 
810 
Hello All,
I am trying to understand something I read in an article about magnetars and pulsars. The article states...

Apr610 11:15 AM
DaleSpam

1 
1,092 
hey quick question about Fraunhoffer diffraction:
RESTULT 1
for a rectanguar apperture, we have the following...

Apr610 07:34 AM
Andy Resnick

1 
777 
I have two questions actually:
1. According to Stefen's Law formula power created by an conventional tungsten bulb...

Apr610 10:46 PM
russ_watters

6 
2,406 
There is a crystal structure relationship for circular birefringence which can tell you if a crystal structure will...

Apr610 09:40 AM
enotstrebor

0 
865 
Can anyone explain why the direction of a wave vector is the direction of wave propagation?

Apr610 10:56 AM
DaleSpam

5 
1,440 
Heres my scenario:
I have a 4315kg load on 4 vwheels.
My initial velocity is 0
My final velocity is 40mm/sec
My...

Apr710 04:28 PM
solarengineer

0 
487 
This is bugging me and maybe someon can help me find the obvious mistake:
I want to calculate the minimum power...

Apr910 09:22 AM
guest1

25 
3,630 
Hi everybody ,
This is the first time i am posting on this forum.
A couple of days back i was having a...

Apr910 02:50 AM
pankaj66866

15 
1,995 
\epsilon^{\mu_1\mu_2\cdots\mu_k\ \mu_{k+1}\cdots\mu_D}
\epsilon_{\mu_1\cdots\mu_k\ \nu_{k+1}\cdots\nu_{D}}
=...

Apr710 04:56 AM
ismaili

0 
646 
Simple? You would think so , see if you agree with my approach...
I have a car, I know its power at certain Rpm's...

Apr710 12:10 PM
jack action

1 
1,754 
from masteringphyics.com,
\\\\\\\\
the binding energy of a nucleus is defined as the difference between the rest...

Apr810 06:38 AM
quietrain

3 
1,238 
Hi everyone,
I am new to the forum, so please instruct me if I commit any posting faux pas in my first post.
...

Apr910 11:13 AM
stewartcs

4 
2,874 
I'm going to try to explain this as well as I can.
Two masses M1 and M2 are connected by chain and hung over a...

Apr710 02:24 PM
pallidin

2 
632 
I cannot determine how to figure out how many phases of H20 are present using steam tables given two variables. I have...

Apr710 07:49 PM
mandangalo

0 
491 
I read a lot of books on the uniqueness theorem of Poisson equation,but all of them are confined to a bounded domain...

Apr910 09:58 AM
netheril96

8 
1,648 
I'm interested in building a plasma loudspeaker using a 1kW amplitude modulated RF amplifier. The amplifier will...

Apr810 12:19 AM
thadman

0 
645 
Don't know if this has already been asked.
A system of six hinged (articulated?) bars, all equal, forming an hexagon...

Apr810 07:02 AM
lightarrow

0 
655 
In the following I am always talking about fraunhoffer diffraction
suppose you have two slits in a doulbe slit...

Apr910 08:11 AM
Andy Resnick

3 
2,081 
Hello,
I'm taking a first year university course in electromagnetism. At a certain point we came upon the torque on...

Apr910 08:45 AM
nonequilibrium

3 
2,236 
So, is there any? Friction being derived from EM forces of particles, does charging the surface of moving object...

Apr910 03:25 AM
looka

0 
869 
Hi! I have experimental data measuring losses across an obstruction in compressible flow which basically consists of...

Apr910 02:20 PM
kayjaygee_13

0 
624 
Please give at least five applications of charging a capacitors.

Apr910 01:09 PM
Ali Asadullah

0 
546 
It seems really basic, like a remark which probably everyone asks himself when first coming upon electromagnetism, but...

Apr910 10:24 PM
Pengwuino

8 
648 