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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 47,855
I need to do a practical about a yoyo. We made a video (somebody keeps te jojo from teh ground a certain height...
Jan24-04 11:09 AM
drPaZQaL
9 2,789
This is apparently a well known topic, but I did not know it before today. Let us consider the Ampère law for the...
Mar17-09 04:15 AM
lalbatros
5 2,789
Is there a unit to measure the compressability of a gas? What gases are the hardest to compress? The easiest? Any...
Jun16-06 10:06 PM
Bystander
7 2,788
Hello, I have read over many textbooks and websites (including posts on this forum) relating to the concept of tension...
Mar12-07 07:04 PM
p3t3r1
10 2,788
Assume there is a boat of length 4 m weighing 40 kg. One man of weight 50 kg is at one end (A) and the other of weight...
Jul29-11 12:34 PM
Dickfore
31 2,788
Friends, I have seen the wave equation solved by changing the coordinates to u=x+ct and v=x-ct. This is...
Nov13-06 06:19 AM
ObsessiveMathsFreak
9 2,787
Simple question, if the force of gravity is proportional to mass and distance, as in Newton's and Einstein's theories...
Sep14-11 10:08 AM
ZapperZ
10 2,787
Several youtube videos show how to open a winebottle with a shoe, if the corkscrew is missing. Normally I would have...
Jun5-12 01:22 AM
laddhoffman
14 2,787
What is the angular momentum of a rod rotating about one end (mass M and angular velocity ш),about its center of mass?
Dec26-12 06:02 PM
Astronuc
16 2,787
hi, in the case of elastic collision of two balls in constant speeds, if we took the origin in the center of of one...
Feb10-06 06:51 PM
Doc Al
9 2,786
Hey, I've been running into a bunch of lighting and sound techs that keep trying to tell me that leaving power cable...
Mar20-09 01:22 PM
Bob S
8 2,786
In the steady state heat conduction through a solid rod the theoretical derivation tells that heat in-heat...
Apr5-07 02:40 AM
lpfr
1 2,785
In general, a good absorbers of radiation are also good emitters. In commonsense, something that is should be a poor...
Oct14-09 11:58 PM
Born2bwire
3 2,785
Hi everyone, I've got a set of airfoil blades here which are homogenious and have a constant profile (x-section)....
May25-11 11:54 PM
ntn
3 2,784
Hi, my question is about determining the damping ratio for the upper spring-damper part of the system given in the...
Dec1-09 12:11 PM
SystemTheory
1 2,784
Basic premise: a pure tone sine wave can be modeled with a pendulum and the rate of amplitude decay can be manipulated...
Jan12-11 06:02 PM
dulrich
1 2,784
A question has been bothering me for some time - when we look at the sun, what are we looking at? The standard answer...
Jun25-10 03:47 AM
Borek
9 2,783
Hello, I was doing some research on differentiating kinematics. For example, differentiating displacement will give...
Oct14-13 06:06 PM
cosmik debris
10 2,783
Im having trouble with a question I have to answer, It's not so much the answer I want but im having trouble...
Mar17-04 06:52 PM
jamesrc
1 2,782
Hi, new to the forum here I have this bike-engine here and I am thinking whether it would be possible to mount it...
Jan22-10 09:11 AM
badshot
0 2,782
hello i just joined this forum and it looks to be very very useful, particularly on the tests that i am about...
Jun16-07 02:27 PM
mfescience
6 2,781
I can understand why the electric field inside a charged sphere is zero when there's electrostatic equilibrium. I...
Dec16-09 01:49 PM
LucasGB
4 2,781
some of you may have heard of a guass gun, coil gun, or em mass accelerator. if not google has you covered. I am...
Aug30-05 06:50 PM
oldunion
5 2,780
Hey guys! This is a question that has been troubling me for a bit. What causes electro magnetic waves to be...
Aug20-11 09:33 PM
SteamKing
15 2,780
It is easily derived from trigonometric identities that ...
Feb3-12 03:59 AM
Studiot
8 2,780
im basing my assumption that it is no, because light is energy acting as aparticle and because it creates no mass it...
Jun9-04 08:47 AM
Chi Meson
20 2,779
This question was presented as one of those "think about it" questions in my physics class. Its not worth any points,...
Apr30-08 12:44 AM
daveyman
18 2,779
Hi i m new here. i 'll get straight to the point. we know that a thermodynamic system always tend to proceed to a...
Mar23-09 07:15 PM
Bob S
17 2,779
Can electric fields can be completely shielded using a metal box or metal sphere, please clarify the concept.
May19-11 12:01 PM
f95toli
6 2,779
Why doesn't an irreversible adiabatic process follow the equation, PV^(gamma)=constant?
Aug12-05 03:22 AM
asdf1
3 2,778
While reading through the Feynman Lectures on Physics (volume 1, number 28) I have come across the formula for the...
Jan4-10 04:04 PM
clem
2 2,778
I know what the definition of torque and angular momentum is. But I read in a few books that "Torque and angular...
Aug4-10 12:19 AM
metalrose
22 2,778
here is the problem: prove that the vector of the magnetic force cannot be parallel to the plane that contains the...
Oct13-04 12:03 PM
Tide
3 2,777
I wish to understand evaporative cooling. Apparently the principle consists in pumping the vapour above a bath, hence...
Jul22-08 07:06 PM
Angelos K
4 2,777
I was thinking the other day about how conservation of momentum works in terms of a closed system consisting of a...
May13-09 08:08 PM
worldrimroamr
7 2,777
Why can't we see around corners? Or perhaps the right question should be: Why can we see anything at all other than...
Oct23-12 07:26 PM
DaleSpam
15 2,777
Hi, I am working on simulating the change in temperature over time for the ground, given different material types. ...
Oct26-10 04:20 PM
willem2
2 2,776
Hi I'm trying to get a better understanding of dispersion in light. Specifically, the relationship between...
Jan12-11 07:47 PM
Beer-monster
9 2,776
This is exact copy from Griffiths Introduction to Electrodynamics 3rd edition page 421. This is regarding to...
Apr21-11 12:13 AM
Born2bwire
11 2,776
Hi, I remember reading that no work is done on an object in a circular orbit experiencing a centripetal force. ...
Feb22-11 02:51 PM
rcgldr
9 2,775

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