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

Apr2211 05:26 AM
ZapperZ

1 
47,684 
I've been thinking again. The formula for the Maxwell Speed Distribution for a nonideal gas is \displaystyle f(v) =...

Dec2412 07:24 PM
Jorriss

5 
1,101 
The standard (retarded) LiénardWiechert potentials and the expressions for the electric and magnetic fields derived...

Dec2412 03:40 PM
johne1618

0 
884 
I have been thinking about Ohm's Law in one particular situation. say I have a trace on top of a ground plane on a...

Dec2412 02:17 PM
yungman

7 
1,483 
Assuming
$$\vec{r_{a}}$$ and $$\vec{r_{b}}$$ is calculated from an inertial frame of reference.
then for any two...

Dec2412 01:11 PM
Doc Al

10 
1,100 
We have a Newtons cradle , when you let go of one ball at one end you know what happens. Rlease one ball and the other...

Dec2412 06:33 AM
Redbelly98

10 
1,762 
When you open a door you apply force in any particular direction and as a result you get rotational motion of the...

Dec2412 05:04 AM
D'Alembert

7 
1,404 
I'm curious about how precession works. From what I thought I understood about angular momentum and torque vectors,...

Dec2312 09:59 PM
Andrew Mason

1 
774 
This question is from my textbook: Thermodynamics an Engineering Approach 7ed SI Units, cengel. It is problem 10129...

Dec2312 04:35 PM
mfb

1 
1,234 
I hope I can make this understandable.
I'm working on a design to utilize combustion of propane to cycle a piston....

Dec2212 11:19 AM
256bits

1 
849 
I am familiar with standard distancetime models for paths of projectiles in perfect conditions, ie, where the...

Dec2212 04:48 AM
Cleonis

3 
989 
Hello everyone.
I am working on a VTOL RC craft that I hope will work. I was planning on using a centrifugal fan...

Dec2112 01:30 PM
blainiac

2 
1,013 
From theory, we know that Boltzmann entropy for a given distribution, defined through a set of occupancy numbers {ni},...

Dec2112 09:08 AM
Rap

1 
812 
In physics class today, our teacher wanted to demonstrate that mass doesn't have an effect on fall speed. (The class...

Dec2112 07:06 AM
K^2

8 
1,353 
Dear forum
I have s issue concerning rectification of a sinusoidal voltage with a diode. It is a experiment i am...

Dec2112 06:58 AM
Studiot

19 
1,797 
Assume you have a weightless constant volume container "filled with" vacuum. If you let it float in the atmosphere,...

Dec2112 06:32 AM
sophiecentaur

1 
630 
So, Poisson's theorem states that if 2 variables, u and v, are constants of the motion, then one can find a third...

Dec2012 09:01 PM
Pavlov

5 
2,937 
I would like to calculate the power of a beam of light once I know the electric field amplitude. For example if I know...

Dec2012 05:45 PM
mfb

3 
771 
Elementary particles spin. So does the Earth. Spin does work. The spin of electrons and other elementary partlces...

Dec2012 05:02 PM
mfb

4 
787 
I'm currently wanting to model an RLC circuit that is driven by a toroid transformer with a driving current, I(t). ...

Dec2012 03:18 PM
blargh4fun

0 
656 
Greetings,
I have been having some fun in the last couple of days by looking at the details of historically...

Dec2012 03:17 PM
Studiot

16 
1,355 
Hello guys, I'm studying Thermodynamics and I don't totally see how you introduce the potencials using Legendre...

Dec2012 12:48 PM
Philip Wood

4 
949 
Hey guys, can the work done on a body be described as the function of time during which a force acts upon it?

Dec2012 11:36 AM
mfb

7 
767 
Can electric field be induced at a point near a time varying uniform magnetic field? "Near" means not the in the place...

Dec2012 09:35 AM
dev70

14 
1,763 
Hi,
how to calculate the force on a charged conductive body (ball), when that body is between two parallel plates...

Dec2012 04:18 AM
juvan

20 
1,773 
Hi
How much volume would be in the following round pipes
1. 1000mm x 50mm
2. 1000mm x 76mm
3. 1000mm x 101mm
...

Dec2012 04:15 AM
sophiecentaur

9 
701 
I have studied a few online sources about static equilibrium in a mechanical system. My overall understanding is that...

Dec2012 12:12 AM
rdbateman

7 
1,572 
Hi everyone,
I am no expert in any means, so if what I am asking is silly, just tell me.
This is an example. ...

Dec1912 11:57 PM
Chestermiller

16 
13,270 
I just want to make sure my thinking and free body is correct before I go further in a project I am working on; for...

Dec1912 10:54 PM
rdbateman

4 
701 
Hi,
I undersand that tension is the force exerted on an object by a string or rope when pulled. Where I get...

Dec1912 10:53 PM
rdbateman

11 
1,593 
Hello!
I' currently reading EM and am in need of a verification that I understood it correctly before proceeding....

Dec1912 05:10 PM
GeorgeRaetz

1 
543 
I was reading a paper about channeling radiation and it had a graph of radiation with photon energy on the x axis and...

Dec1912 04:06 PM
Sirben4

0 
493 
Relative motion between a permanent magnet and a conductor wire produces electric current in the wire. Would induced...

Dec1912 03:29 PM
Andrew Mason

30 
4,872 
I'm finding it difficult to understand how momentum is conserved in an inelastic collision, but kinetic energy isn't....

Dec1912 02:21 PM
Sweeney

4 
1,243 
a car of mass 750 kg moving vith velocity 15 km/hr on inclined paddle (θ=7.13 degrees).at distance of 36" the paddle...

Dec1912 02:17 PM
rdbateman

1 
882 
Dear Physics Forums,
Pressure is force / area, and force is mass * acceleration. When you have a gas in a...

Dec1912 12:00 PM
Studiot

3 
1,023 
I think that I may be confused about what free energy is.
I want to find the maximum PE of a system. So this is...

Dec1912 10:45 AM
LizardCobra

0 
719 
Sorry, I got my answer already.

Dec1912 01:17 AM
yungman

0 
414 
When 2 ideal gas mix, there will be no temperature change. Is that because there will not be any chemical reaction...

Dec1812 11:34 PM
Outrageous

2 
718 
Hey folks. I was reading this odd explanation for why the bottom of a hanging Slinky appears to defy gravity when the...

Dec1812 08:15 PM
Karl Coryat

4 
588 
Hello,
I am currently studying the 3body problem and I am struggling to find some examples of exercises or resolved...

Dec1812 07:52 PM
Gigio

7 
1,312 