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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 47,680
Is force just acting energy?
Oct23-09 05:46 PM
mikelepore
11 1,851
I am having problems with a simple problem with a mass (m) stationary on an inclined plane of angle θ. I have...
Oct23-09 05:14 PM
DaleSpam
1 1,999
When cars turn they lean away from the turn as the torque from the centripetal force is balanced by the larger normal...
Oct23-09 12:38 PM
sophiecentaur
3 3,998
new to physics can some one plz help me with b and c Load (kN) 0 20 30 50 60 ...
Oct23-09 11:44 AM
lordajm
0 1,079
So, I was thinking a while ago about force fields. Don't stop reading though, hear me out. It occurred to me that...
Oct23-09 11:00 AM
Bob S
6 8,154
Is it possible to deduce that a blackhole must have something akin to Hawking radiation due to the 2nd Law of...
Oct23-09 08:45 AM
Bacat
3 828
Hi I'm new here and I figured I would post a question that I have thought about but never really understood from...
Oct22-09 02:52 PM
Borek
5 2,068
I'm trying to derive fokker-planck equations using the Liouville operator for classical systems. part of it relies on...
Oct22-09 02:40 PM
bubbloy
0 1,105
Hi I'm trying to define a Newtonian lagrangian in an rotating reference frame (with no potential) Something to...
Oct22-09 12:55 AM
mtak0114
4 4,740
Hello Forum, given a input=delta located at time t=0, the system will respond generating a function h(t). If the...
Oct21-09 11:23 PM
kzhu
1 1,393
what is "conservation of angular momentum".
Oct21-09 01:24 PM
Bob_for_short
1 805
Is it possible for a power plant to attain a PLF of about 109 - 110%? Gas, coal, nuclear any plant technology,...
Oct21-09 01:14 PM
Bob S
5 3,879
I was reading the proof of how the work done on an ideal fluid which has been pressurized to a pressure 'P' is P. ...
Oct21-09 11:32 AM
nucleus
20 5,385
Let's say we have a symmetrical weather wane that's free to rotate about its vertical axis, and a uniform fluid flows...
Oct21-09 10:02 AM
AxelBoldt
24 2,797
Can someone explain to me what the difference between a potential and a voltage are. My understanding as of now is...
Oct21-09 09:23 AM
dE_logics
32 25,578
Hi all, I just noticed that by shaking the water off my hands 3 times after using the toilet I can reduce the...
Oct21-09 08:16 AM
dymitrruta
0 877
NOTE: I AM NOT POSTING A HW QUESTION. It is the last problem, 4.29. 4.29 A "superball" of mass m bounces back...
Oct21-09 07:30 AM
WiFO215
2 2,984
I was told today in a lecture that there is such a thing called an inertia force that occurs only when an object is...
Oct21-09 04:38 AM
Doc Al
8 961
What are you able to derive or integrate from a voltage vs. time graph? Like if I have a battery and a resistor and...
Oct21-09 03:15 AM
mikelepore
4 9,964
IF you throw metal or wood or whatever material ball into soft bed then it almost do not reflecting from bed as you...
Oct21-09 01:37 AM
vissarion.eu
13 1,312
The airplane shown is in level flight at an altitude of 0.50 km and a speed of 150 km/h. At what distance d should it...
Oct21-09 01:17 AM
patelkey
5 1,488
A 5.0 kg mass is suspended by a string from the ceiling of an elevator that is moving upward with a speed which is...
Oct21-09 12:19 AM
patelkey
2 2,157
Just wondering if the Betz limit is applicable to hydro turbines or if there is some analogous limit for hydro...
Oct20-09 10:14 PM
rmm5
3 2,801
I'm wondering what happens (or if it makes sense) if in the formula \mathbf{F} = q (\mathbf{E} + \mathbf{v} \times...
Oct20-09 09:06 PM
fluidistic
2 767
in circuits involving inductors can we use kirchoff law ? i have seen this in many books but the electric field...
Oct20-09 04:53 PM
willem2
3 3,117
N.B: I was trying to apply kirchoff’s voltage law to this ckt diagram. (created by myself :smile:) ...
Oct20-09 04:35 PM
sphyics
4 2,210
Hi I want some problems and solutions about thermodynamic.Can you help me?
Oct20-09 12:40 PM
Mapes
2 799
I'm mainly looking for some practical guidance here. I'd like to build an electromagnet coil that's capable of...
Oct20-09 11:08 AM
Bob S
2 4,979
Hello all, I'm sure you all know the standard relation between torque and angular acceleration: \tau = I\alpha ...
Oct20-09 04:21 AM
D H
9 1,145
Can someone send me some interesting chain problems?
Oct20-09 03:39 AM
debanik1
0 593
Does the magnetic field around a magnet increase when the distance away from the magnet increases? While using a...
Oct20-09 02:07 AM
Gauss20000
3 2,267
Hi, This must be a text book question but I couldn't find exact definitions(quantitative) of these measurements...
Oct19-09 11:20 PM
Born2bwire
3 5,825
Is the Change in Rotational Kinetic Energy Frame Invariant? ...
Oct19-09 10:29 PM
DaleSpam
6 2,549
Yesterday I finally, and sadly, put my Matilda 'Southwind' to bed for the winter. I want to lift her off her...
Oct19-09 10:13 PM
Bob S
3 826
Is it possible to have magnetic flux through an open surface ? i mean if there is a circular arc and magnetic field...
Oct19-09 02:19 PM
rplatter
1 685
I'm only midway to finish my introduction to electromagnetism (level around Resnick-Halliday) so I understand the...
Oct19-09 01:07 PM
Bob_for_short
5 886
I remember reading a thread here on PF about how paper towels can absorb water. I think the answer was that the towel...
Oct19-09 08:41 AM
Andy Resnick
3 785
It is well known, that a point charge q\delta^3(\boldsymbol{x}-\boldsymbol{x}') creates the same electric field...
Oct19-09 08:24 AM
Bob_for_short
6 568
I have a sphere (mass m, radius r) whose centre of mass is r/2 distance away from its geometric centre. If it is kept...
Oct19-09 01:14 AM
raghavgupta93
0 2,565
F=ma How do we define m and F? If their definition both come from this equation, then the equation doesn't really...
Oct19-09 12:29 AM
Martin
31 10,377

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