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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 45,694
"The number of magnetic lines of force passing through any area in a magnetic is known as magnetic flux" So the...
Apr18-08 05:41 AM
Shooting Star
9 11,318
Hi all Not sure if I posted in the right spot but my question is in regards to optics and projection. To make a...
Apr17-08 09:28 PM
rotor_hed80
6 1,500
How to calculate the rotationals and torque forces on a hydraulic cyclinder, which is on a 14" arm welded to a 3" o.d....
Apr17-08 03:57 PM
Windseaker
0 1,141
I was doing an experiment to determine the capacitance of a capacitor in a circuit with a particular resistor R. This...
Apr17-08 10:55 AM
Redbelly98
10 3,112
How can I calculate potential enegry? I have a interpretation about it, we should use the work that the string...
Apr17-08 10:42 AM
Redbelly98
1 6,547
I have a problem in trying to express a net force equation for a falling elastic object when collision ensues. For...
Apr17-08 03:37 AM
benabean
1 4,563
scenario: If any generator ultimately 'pushes' current (free surface electrons) down a wire, moving trillions of...
Apr16-08 07:23 PM
russ_watters
6 1,860
y for all real vertical throw, the time taken to reach max height must b shorter than time taken to return to starting...
Apr16-08 07:12 PM
indr0008
10 4,969
Hello, I have a potential function given numerically at points evenly spaced. That is to say, I have the numerical...
Apr16-08 02:41 PM
hattori
0 1,153
I found this problem in the book Resnick and Halliday many years ago (1992) and I had it in my mind until 2005 or so...
Apr16-08 11:57 AM
Barfolumu
9 1,473
Wel, this is just crazy. I've noticed something weird about spinning tops. Most of them start loosing speed, then,...
Apr16-08 11:34 AM
wysard
5 1,946
Hi, I'm a grad student in computer engineering and my research involves a fair amout of mechanics (forward/inverse...
Apr15-08 04:48 PM
D H
17 3,039
Why is it that if an orbiting space station is observed to remain always vertically above the same point on Earth then...
Apr15-08 08:35 AM
D H
6 1,756
Say you had a circuit with a battery and a loop of wire somewhere in the middle of the circuit. The loop of wire is...
Apr15-08 06:46 AM
Redbelly98
4 6,645
What is cause of capacitor breakdown? When we combine different capacitors in series and parallel combination, how...
Apr15-08 12:59 AM
Phrak
4 6,890
I am a physics student just finishing my sophomore year, and i was looking into what i could expect in upcoming...
Apr15-08 12:28 AM
Marthius
3 1,333
Is there such a thing in electrical circuits, or anywhere else? Or is this just considered reverse polarity, or 0V?
Apr14-08 11:01 PM
nuby
9 2,339
Ok, dumb question, I know. But it's been bugging me, and I can't find a straight answer anywhere, so here it goes: ...
Apr14-08 10:11 PM
Usaf Moji
2 1,248
Given n (finite) point charges in the xy-plane, is it possible to have a curve (in the plane) along which the...
Apr14-08 06:05 PM
ZapperZ
10 1,628
Hey all, so i have a cylindrical 1.61 tesla magnet with pole orientations (+)_)- being spun at 350RPMs in a...
Apr14-08 04:11 PM
chassiz
0 3,017
So I know there is an upper cutoff frequency (at least in the microwave band) for a rectangular waveguide. However...
Apr14-08 12:00 PM
lbrits
1 5,733
I PM'ed the admins for the best place to ask this question, but have not heard back so: I would like to hire...
Apr14-08 11:45 AM
Zack311
0 1,505
This has always bugged me, and I don't think that I've ever gotten a satisfactory explanation (even though it's a...
Apr14-08 06:48 AM
resolvent
13 7,126
All right, so, we just went over linear momentum in school, and one thing is confusing me: If I throw something at...
Apr13-08 05:25 PM
Shooting Star
11 2,417
Hi everybody, I have faced with a problem in my report. The question said that "How can ferromagnetic effect change...
Apr13-08 02:30 PM
slayercantona
2 2,216
Hi, I'm doing a question about Boyles law, and I don't understand some of the units they are giving. Initial...
Apr13-08 11:40 AM
mdnazmulh
1 1,277
Today I was outside to get some grass for my rabbit. I took some yellow dandelions too, but as I entered the elevator...
Apr13-08 06:39 AM
Tachyonie
3 1,568
Dear All I have a problem that can be represented in two different forms. Problem is related to propagation of waves...
Apr13-08 04:31 AM
tiny-tim
3 5,568
surely \vec{\nabla} \times \vec{B} \neq 0 in general but the work done by magnetic field on any charge is 0 hence is...
Apr12-08 02:33 PM
genneth
6 4,391
What are electromagnetic waves supposed to look like in 3D? Also, in the vacuum of space, electromagnetic waves...
Apr12-08 11:09 AM
lbrits
19 5,957
Hi, I have this question. If a diode were connected to a circuit with an alternating current and there was a...
Apr12-08 06:35 AM
Icetray
1 1,125
In practice, the suspension system of a car consists of a spring under compression combined with a shock absorber...
Apr12-08 04:10 AM
tiny-tim
6 3,993
Hi guys, In quantum mechanics, the virial theorem for a system in its ground state is proved by a very nice scaling...
Apr11-08 03:48 PM
luben
1 1,764
Suppose I have 2 bodies, M1 and M2. Assuming that no other forces are acting on them aside from gravity, what is the...
Apr11-08 11:34 AM
Ulysees
3 2,787
According to Bernoulli's law pressure and velocity along a stream line are related to each other. What is the most...
Apr11-08 06:25 AM
Astronuc
7 3,671
hello all, I got a bit of a problem. I want to calculate the vapor density (kg/ m3 or lbs/ ft3) with the following...
Apr11-08 01:46 AM
timvk
3 4,129
then that object would vaporize or cause a nuclear explosion. Atoms crashing into an object at the speed of light...
Apr10-08 11:58 PM
Feldoh
4 1,214
Greetings, Regarding a mass on a spring – I know the classic differential equation is m \frac {dx^2(t)}{dt^2}...
Apr10-08 03:32 PM
Sparky_
9 1,731
If two different masses, separated by a spring, are pulled apart, and then the spring is instantaneously release from...
Apr9-08 06:51 PM
grabbinghands
6 2,940
If a string is attached to a weight and swung around overhead, is the force that creates tension on the string...
Apr9-08 06:37 PM
DaveC426913
18 2,945

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