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Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 47,900
say you have a very very long (or infinite) straight wire the carried a charge (glued to the wire) and the wire moves...
Aug6-12 03:28 PM
bigerst
4 973
im reading introduction to electrodynmics by griffiths, the math techniques used is sloppy to the point of...
Aug7-12 06:52 PM
bigerst
9 1,114
is it possible to construct a system with only finite number of point charges of arbitrary magnitude at finite...
Aug18-12 10:15 AM
bigerst
2 995
most(or all) proofs i have seen of gauss's law is based on coulumb's law. however coulumb's law is based off of...
Sep3-12 05:01 PM
bigerst
3 861
D=Drag Coefficient p=Density of air A=Cross sectional area v=velocity a=acceleration F= force F air=(DpAv^2)/2...
Oct7-10 07:48 AM
tiny-tim
1 1,558
I have read that air pressure is about 100,000 pascalls which = 100,000 newtons/m2 which is enough to accelarate a...
Sep17-05 05:04 PM
Astronuc
5 6,027
I'm a little confused about "voltage". We learned that voltage is somewhat similar to electric field: a way to refer...
Nov11-08 12:32 AM
jtbell
7 1,847
Good day, I happened across an interesting interactive JAVA applet demonstrating the diffraction of light through a...
Apr18-06 06:48 AM
BigMonkey
3 1,840
This is a concept that has always eluded me. I'm a Biologist who works in the Pharmaceutical Industry and I need to...
Aug21-07 03:02 AM
Imagelist
15 3,600
hello everyone. Can anyone please help with following questions? 1. Can coefficient of friction (both static and...
Nov3-13 01:30 PM
clem
1 436
Hello all, I officiate high school and college basketball. One of our rules concerning a dribble states...
Oct30-07 02:09 PM
berkeman
3 1,135
These problems are really giving me fits, I would really appreciate some help. A 12200 kg sailboat experiences an...
Sep22-04 01:11 AM
Simonnava
5 4,039
Hello All.... I am just wondering about something. The lift equation is, L= \frac {C_L \rho A V^2} 2 ...
Oct24-07 04:31 AM
white flock
4 12,429
Hi, in class we were talking about lenses and how there is a certain focal length where all images 'far enough' away...
Mar19-11 03:53 PM
Andy Resnick
1 1,005
Dear friends, and science lovers, I am doing some statics problems with moment( cross-product).And I've been...
Nov16-13 01:51 PM
jhae2.718
1 633
Someones like teachers in my country says energy is vector and scalar . Is that true ? Anyone can prov that ?
Oct23-12 08:02 AM
Studiot
7 11,335
Hello all . Why mater victory to anti/matter after big bang ? There is any relation to gravity ?
Nov28-12 04:16 AM
Drakkith
2 501
Hello all . I have two questions Energy can create force ? for apply a force we need energy ? Think about one...
Mar12-13 09:40 PM
DaleSpam
20 1,609
Hi there, I have noticed that when the wadding pool I work at is draining, a small whirlpool appears over the drain...
Jul12-11 10:20 AM
chrisbaird
1 1,399
Hi all, I am wandering if I can apply the Kramers-Kronig (KK) relations to the complex wavenumber k(ω) = k'(ω) + i...
Feb10-14 02:52 PM
maajdl
1 282
I need to calculate the the load F (in multiples of W) required to keep the link ABC in equilibrium under the action...
Sep27-10 11:43 PM
bijesh_msg
0 896
From theory, we know that Boltzmann entropy for a given distribution, defined through a set of occupancy numbers {ni},...
Dec21-12 09:08 AM
Rap
1 818
I was reading in my geology book (Earth: An Introduction To Physical Geography, 7th ed. by Tarbuck and Lutgens, 2002,...
Oct21-10 03:48 PM
Studiot
9 2,759
I am looking for educational derivation( or any available and detailed) of the key principle of statistical...
Apr23-08 01:28 AM
bilha nissenson
12 2,499
When a cue ball is driven into another ball, it is either not accelerating or decelerating at impact. It has momentum...
Aug9-11 12:14 AM
rcgldr
1 1,171
If I combine 2 laser beams of different wavelengths, would I get a beat frequency of the difference between the 2...
Oct15-11 02:46 PM
xts
2 1,217
I went for a run and measured time and distance. I wanted to estimate how many calories I used. Suppose a ran a...
Dec13-07 07:17 AM
Shooting Star
1 2,553
Hi I am new to this forum. I am an amateur blacksmith/machinist/all around tinkerer. I took a class with a...
May28-14 07:33 AM
Nugatory
4 228
Okay, first a brief intro. I studied math/physics extensively as an undergrad...but that was over 10 years ago now. ...
Sep3-10 09:08 PM
Bill M
2 936
Hello, I'm trying to figure out a method of calculating the work done by friction on an object sliding down a...
Feb17-11 04:32 AM
tiny-tim
14 3,984
If the crest of one light wave meets the trough of another light wave of the same frequency and intensity they...
Feb17-08 02:04 PM
Jakell
1 3,942
How do I calculate the force (in newtons) acting on a conductor moving through a magnetic field? This is in relation...
Apr24-07 06:29 AM
bill nye scienceguy!
6 1,764
does a high dryness fraction mean that the steam is dry or wet?
Nov27-07 09:52 AM
bill nye scienceguy!
4 18,764
i need to find max shear stress at a point on a plate (with a hole) under tension. i found using experimental data the...
Dec6-07 10:54 AM
FredGarvin
1 4,362
if there is a decrease in pressure at constant temperature will there be an increase in entropy?
Dec20-07 04:31 PM
Andrew Mason
7 5,943
what exactly is the cut-off ratio, in physical terms?
Jan2-08 03:57 PM
brewnog
2 3,996
I want to calculate the temperature on the outside of a pipe which has a heated fluid flowing through it. If I know...
Jan23-09 06:14 PM
henxan
2 7,965
I am in the final year of an MEng in mechanical engineering, working on my Final Year Project. I've been designing a...
Nov17-09 08:19 AM
bill nye scienceguy!
0 580
I guess this question applies to deriving empirical equations from any data set but in my engineering studies I've...
Mar23-10 02:16 PM
Naty1
1 2,531
As I was sitting at work the other day productively watching an aeroplane fly across the window I started to think of...
Feb28-12 07:49 AM
Hassan2
5 718

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