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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
1 47,831
how much time does it takes to heat a container or diameter 20 cms
Nov23-09 01:06 PM
1 809
F=-\nablaV i cannot fully understand it ,though i can deduce it in some ways. i also want to know why potential...
Nov23-09 09:34 AM
1 739
I can't prove the Newton's third law. Please tell me how to prove the Newton's third law. Thanks.
Nov23-09 09:03 AM
7 5,304
In the beginning scene of the film One Eight Seven, Samuel Jackson's character has one of his students hold a bicycle...
Nov23-09 05:09 AM
2 1,108
Say you had two tanks of significantly different temperature water (Say 25 deg Celsius, and 70 degrees Celsius) and...
Nov22-09 10:36 PM
3 2,615
Voltage = Charge / Capacitance. This assumes that the capacitor has +Q charge on one side and -Q charge on the...
Nov22-09 09:34 PM
3 995
so here are my questions: Does a single capacitor take longer to discharge than two capacitor is series? Why?...
Nov22-09 07:56 PM
5 7,397
For an integrable Hamiltonian system with N degrees of freedom, there exist N commuting (the poisson bracket of any...
Nov22-09 07:17 PM
0 730
I have a question regarding the similarity between the Biot-Savart law and the equation that gives the magnetic field...
Nov22-09 05:37 PM
0 509
When we have electron and proton . Both electron and proton have electric field and electric field has energy.Inside...
Nov22-09 01:38 PM
4 944
Dear All I have a question about tension in a mass system with pulleys. The...
Nov22-09 12:24 PM
Doc Al
2 1,047
im having trouble find out when exactly is the intial speed and final speed when dealing with momentum....for example:...
Nov22-09 12:10 PM
Doc Al
1 700
When I put a near 0C water in a glass which is at room temperature (around 25-30C), some water in air (humidity)...
Nov22-09 10:18 AM
2 2,066
Hi! I'm trying to build a "pump" pushing water a few meters up of the river bank, and wondered if I could do it...
Nov22-09 09:14 AM
21 8,719
Hello, My 7th grade son has selected a science project which requires to find the impact of two toy cars...
Nov22-09 08:15 AM
3 5,089
can anybody tell me .the concept of rigid Rotator.Kindly let me know the idea.
Nov22-09 04:19 AM
1 811
if a cylinder rolls down and incline without slipping then i decrease the coefficient of friction and it does slip...
Nov22-09 12:47 AM
15 1,827
I am usually bad with calculations, so please help me out. It's not a homework, merely my interest... So, lets say...
Nov21-09 10:17 PM
3 1,364
In the photoelectric effect, if you have a frequency above the threshold frequency, electrons are ejected with greater...
Nov21-09 09:56 PM
0 461
Gravitational force is divided by distance squared. What is the equivalent divisor for a fixed bar magnet? Thank...
Nov21-09 09:21 PM
4 5,628
So I'm relatively new to the world of physics (Junior in high school) and I'm having a little trouble sometimes with...
Nov21-09 08:52 PM
2 688
If a cylindrical tank of radius 1m rests on a platform 5m above the ground. Initially the tank is filled with water up...
Nov21-09 12:13 PM
2 607
Why is the trajectory of a rocket always parabolic if a rocket launches straight up in the air perpendicular to the...
Nov21-09 12:09 PM
IPhO' 2008
4 4,017
As we know, Newton's Law of Gravitation is \ and Coulomb's law is \ We know from comparing the...
Nov21-09 11:22 AM
1 1,755
When a sphere radius r has a velocity v in a liquid .It will has a drag force exerted on the sphere. The drag force is...
Nov21-09 10:16 AM
5 2,238
Can you tell me how to find CG. point. thank you.
Nov21-09 08:48 AM
8 2,805
I try to clearify it as much as I can, and I greatly appriciate the given answers. Suppose that we have a rigid...
Nov21-09 12:46 AM
2 1,237
We can use B = \frac{\mu}{4\pi} \frac{q}{r3} when v << c (c is a speed of light) but if v is nearly to c we can't...
Nov20-09 11:02 PM
IPhO' 2008
3 660
How do you see the whole of milky way if we are in it?
Nov20-09 07:23 PM
3 979
I solved the problem below using Einstein's Equivalence Principle, or "elevator experiment," and I easily find an...
Nov20-09 05:42 PM
0 601
I am working on a simulation of a ball moving in a complex 2d environment. I am looking for a single physics model...
Nov20-09 03:52 PM
15 2,057
What is image charge? and how we can use image charge? thank you so much.
Nov20-09 12:15 PM
Bob S
5 3,730
I am having two metal sheets which are curved and fitted on the outer sides of a pipe. A 9V pottential is applied to...
Nov20-09 09:00 AM
2 1,028
A charge q has a velocity v in the magnetic field B if v is nearly to velocity of light. Can we use F = qvB....
Nov20-09 06:28 AM
3 4,998
Attention FORUM ADMINISTRATOR Request regarding my thread "Energy Converted to Electricity" I seem to have asked...
Nov20-09 05:44 AM
2 2,354
Heinrich Lenz postulated in 1834 the following law; "An induced current is always in such a direction as to...
Nov19-09 11:12 PM
5 2,833
Hi there, Having a bit of trouble working something out for a lab experiment at uni - not sure if this really...
Nov19-09 08:29 PM
1 2,386
Can a thermal imaging camera detect a body that is cooler than the detector? Or does the temperature of the detector...
Nov19-09 06:01 PM
1 1,078
The Law of Biot and Savart Law tells us how to find a differential form that generates the first de Rham cohomology of...
Nov19-09 05:06 PM
2 1,355
So I'm sort of confused by voltage and I hope these will clear it up for me; 1) Why can parallel circuits only have...
Nov19-09 09:15 AM
1 540

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