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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 46,936
Why doesn't an irreversible adiabatic process follow the equation, PV^(gamma)=constant?
Aug12-05 03:22 AM
asdf1
3 2,745
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 2,744
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 2,744
In the chapter relative to First law applied to flow processes, my book explains the "Flow Work" which appears in the...
Jan22-12 10:19 AM
I like Serena
12 2,744
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 2,743
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 2,743
I can completely understand why the idea of vectors works for distances. ie - you can use pythagora and trig to work...
Aug25-04 02:52 AM
Galileo
5 2,742
Newton's law of universal gravitation is only valid for point masses. Is it just chance that a person on the earth...
Jun29-08 10:25 PM
gamesguru
5 2,742
Hey all, I am having trouble determing how to get the max amplitude of an underdamped oscillation. Can someone...
Oct1-08 03:50 PM
mathman
1 2,742
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 2,741
is there any equations that can be used for calculating required pump pressure for a horizontal running water pipe...
May26-10 01:34 PM
Bob S
1 2,741
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 2,741
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 2,741
A damped oscillator is described by the equation m(x'') + b(x') + kx = 0, where the damping force is given by F =...
Nov29-11 03:43 PM
dacruick
5 2,741
We've been set the question of- In an isothermal expansion, and ideal gas at initial pressure Po expands until its...
Mar7-04 10:06 AM
Claire84
3 2,740
I had a high-school student ask me this question, and quite frankly, I don't know the answer. It seems obvious by...
Nov21-08 10:57 AM
D H
4 2,740
I have noticed that when an inflatable tube (usually with a passenger on top) is being pulled fast behind a speedboat,...
Jun20-11 01:52 AM
rcgldr
1 2,740
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 2,739
E.g. A football of mass 1kg is thrown with a speed of 10m/s at an angle of 30 degrees from a horizontal plane. Take...
Apr1-09 01:27 PM
Georgepowell
6 2,738
hey do you know how to calculate what is the physical size of the amplitude of a radio wave? like I know how to...
Dec11-10 03:10 PM
cjameshuff
1 2,738
I am trying to detemine the moment of interia of an object, not too accurately. I have the object mounted in...
Apr13-05 06:02 PM
jamesrc
1 2,737
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 2,737
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 2,737
I'm confused by something very simple and stupid. When the mass of a satellite is tiny compared to the body being...
Jan26-12 12:16 PM
DaveC426913
19 2,737
I understand the basics of speed and velocity, but I got a rather backhanded question on a recent test that I believe...
Oct11-11 11:13 PM
cepheid
3 2,736
I would like to calculate the energy need for move in the black volume in gas (move in from r2 to r1), when gas is...
Oct31-12 05:34 PM
lba
15 2,736
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 2,735
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 2,735
To create a solenoid, conductive wire is coiled with n # of turns per unit length. To create a real solenoid can each...
Jun2-08 07:42 AM
benabean
2 2,734
I am a TA in a class covering an introduction to fluid mechanics, thermodynamics and wave motion. We just finished the...
Nov9-10 08:44 AM
zonde
3 2,734
Hi, Hope someone can help me clear up this question. I know the answer but I am unsure of the reasoning behind it, so...
Dec26-09 08:17 AM
ian2012
10 2,733
Say you have a target with a velocity on the x and y axis and acceleration on the x and y axis. Now, you have a gun...
Mar16-07 09:48 AM
lpfr
1 2,731
I understand that to find moment of force, we look at direction of force and perpendicular distance. In the diagram, O...
Sep23-09 04:52 AM
Doc Al
1 2,731
Hi, I'm trying to take this Sellmeier equation, n^2 (λ)=1+ (B_1 λ^2)/(λ^2-C_1 )+(B_2 λ^2)/(λ^2-C_2 )+(B_3...
Jan25-10 11:33 AM
elect_eng
1 2,731
Hello, I am having trouble finding solutions for a localized electromagnetic pulse in 3-D. Ideally, I'd like the...
Dec2-07 11:10 PM
Claude Bile
13 2,729
I have a problem consisting in solving for potential in 2 dim polar coordinates where I am asked to use circular...
Nov4-11 11:31 AM
Andy Resnick
7 2,729
How to visualize thhe components of the energy tensor???? I mean to say that what it means to say that "the amount of...
Feb6-08 03:15 PM
robphy
2 2,728
I'm unsure about the equation Q = It (charge = current * time). Say we have a perfect circuit with minimal resistance....
Feb11-09 11:45 PM
Archosaur
19 2,727
hi here's a questn: "2 vectors acting in same direction have resultant 20 whereas in perpendicular direction...
Jul25-05 04:34 PM
Antiphon
5 2,726
In Popper's autobiography, published in his contribution of Library of Philosophers, I read the following, after...
May17-06 02:54 PM
lalbatros
17 2,726

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