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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
45,498 
Could I please have help with something: If I generated hydrogen via electrolysis from water, sent it high up a long...

Jun1113 05:46 PM
russ_watters

43 
2,558 
Hi to all, i will appreciate your help in this.
This is the situation:
I have a tank, with a water column in it....

Jun1413 09:48 AM
Kamira

28 
1,585 
I have always treated friction as 'opposing' force rather than motion, either at its limit or to maintain equilibrium....

Jun1313 09:54 AM
DaleSpam

17 
4,087 
Hello everybody! This is my first thread and I'm just kind of discovering the forum. If I should make a presentation...

Jun1213 10:42 AM
gerardpc

2 
1,224 
¿ What is heat, really, is the energy that in summatory of energies can´be written in function of temperature? It...

Jun1213 02:21 PM
lightarrow

28 
2,536 
What is the key reason?
I mean if you think about it, poles are just something we create to distinct the magnetic...

Jun1213 12:12 AM
Phztastic

2 
734 
Does anyone out there know how I can calculate the magnetic dipole moment of a simple bar magnet?
Or any kind of...

Jun1113 03:50 AM
Jano L.

10 
1,936 
I'm looking at a general problem in which a skier is going downhill. I understand 'mathematically' how the mass will...

Jun1213 10:21 PM
WannabeNewton

18 
1,307 
Hi,
I'm trying to use image charges to find the force that apply on the following particle (on the attachment) ,...

Jun1013 05:25 AM
adamp121

2 
408 
Hey forum
I need to ask for a link to a page for Variable density or preferably an explanation from someone who...

Jun1013 01:02 PM
bigfooted

2 
520 
I just learnt vectors as a prerequisite to learning mechanics and I have a few doubts:
1) For 1D motion, there are...

Jun1113 09:44 AM
rishch

17 
1,113 
I found the answer already. Please delete this post.
Thanks

Jun1013 04:00 AM
yungman

0 
446 
Hello all,
I am in need of understanding of magnetic fields. More specifically i was wondering exactly why there is...

Jun1013 07:44 PM
WannabeNewton

1 
516 
What cases can the hall effect happen?
While reading this source. It states : "This is most evident in a thin flat...

Jun1113 06:48 AM
Simon Bridge

1 
493 
Hi,
I'm considering the case of diffraction by an object, with dimensions far smaller than the wavelenght of the...

Jun1313 03:15 AM
Talker1500

2 
366 
Hi all,
I'm a complete novice when it comes to describing images in frequency space and i understand that it is a...

Jun1213 11:20 AM
u0362565

4 
528 
I've read recently about systems with the ability to reach negative temperature: where entropy decreases as energy...

Jun1113 07:37 PM
Mute

6 
530 
I get that they have to be at the same position relative to the earth
but why is it that they have to be...

Jun1113 04:31 PM
jbriggs444

5 
1,054 
Hello, I would like to share a cool experiment... but not yet experimented for me.
Suppose you have a ball of metal...

Jun1213 09:58 PM
Simon Bridge

4 
594 
Reading in Russian sources I see they use ballistic coefficients such as these:
BC = 3.0 kg/m^2
or alternatively...

Jun1213 09:59 AM
Simon Bridge

1 
613 
A typical evaporative cooler works by pumping water from a reservoir in the bottom on the cooler onto fiber pads. A...

Jun1113 05:44 PM
russ_watters

1 
441 
Given a general solution to the fixedend twomass coupled harmonic...

Jun1113 05:12 PM
Fnkcook

0 
400 
I understand that too long of a time scale won't resolve an event clearly, and too much has the risk of exciting...

Jun1213 01:45 AM
Simon Bridge

5 
593 
Hello all,
In the equation V= apd/Ln(pd)+b as described by Paschens law regarding breakdown voltage, I was...

Jun1213 02:00 PM
MisterX

1 
485 
Hi everyone, I was just wondering about this...
If I tie a balloon outside a car, using a moderately long string,...

Jun1313 10:39 PM
deep838

16 
900 
in waves and oscillations i read that any bounded medium oscillates in a particular freuency...why is it so?i need a...

Jun1213 10:12 AM
nasu

3 
479 
First off, just clarify that I have a very, very superficial knowledge of Physics, so my apologies if my question is...

Jun1213 03:40 PM
atyy

3 
631 
Hello everyone, looking around I have faith that the members of this forum will be able to point me in the right...

Jun1313 12:49 PM
Alfred Cann

4 
519 
I'm trying to wrap my head around how a rolling and slipping sphere would be behave on an incline (with an angle of θ)...

Jun1313 06:37 AM
jbriggs444

1 
525 
I am designing a Helmholtz Coil with radius 0.5m with 20 gauge Copper wire having 1000 turns. The power generated by...

Jun1213 03:03 PM
tachyon1123

0 
345 
Hi everyone,
I would like to program water thermodynamic properties in C, C++ or Matlab in order to model a steam...

Jun1213 09:16 PM
Solibus

0 
413 
Hi all:
I have been wondering:
picture a cylinder sitting above a sheet of sand paper, assume static friction...

Jun1413 08:15 PM
hihiip201

4 
539 
What is the best way to calculate the coherence length of a laser?

Jun1413 11:11 AM
Claude Bile

1 
409 
Hi,
Stupid question: the NavierStokes equations, do they only consist of the equations for a statement of the...

Jun1313 01:43 PM
Chestermiller

1 
755 
Hi
Can somebody tell me the steps and assumptions made in deriving the equation to calculate the wind velocity around...

Jun1413 03:07 AM
bksree

0 
324 
Hello,
I'm working on a small scale parabolic trough concentrator project to generate electricity.
This...

Jun1413 03:23 AM
sam_89

0 
433 
Hi...
I was looking at the problem of a particle in a Coulomb field in three dimensions. Timetranslation...

Jun1413 11:22 PM
Sphysicist

0 
424 
I've been studying electric fields in class for some time and one thing is seemingly contradictory and really confuses...

Jun1413 03:54 PM
eschavez6

3 
449 
I'm sorry if I may be asking an unanswerable question here, but i've looked all through the forums and the internet to...

Jun1413 09:18 PM
mpatryluk

2 
538 
So I understand that Reynolds number is the ratio of intertial forces to viscous forces but how exactly does this...

Jun1413 10:46 PM
boneh3ad

2 
548 