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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 46,573
There is a homopolar generator on a train moving at 215 km/h. The magnet of the generator is attached to the disk so...
T 11:25 AM
18 213
After studying the methods of Lagrange and Hamilton for a bit I still find myself uneasy about the action. I don't...
T 10:18 AM
15 439
Hello, In an electric circuit, let's say we have a resistor and a generator(Voltage source). The electric field...
T 05:59 AM
22 439
If you apply 100 volts to a 10:1 transformer you will end up with 10 volts out. If you put a 10 ohm resistor on the...
T 03:35 AM
Philip Wood
29 1,266
How earth is considered to inertial frame of reference?
T 12:41 AM
1 101
The following is my take on friction. I wish to verify if my hypothesis is correct. When trying to visualize...
Y 11:24 PM
7 313
Hello. If you give a styrofoam cup to pressure cooker, it expand first, but than it extremly reduce. It reduce...
Y 11:22 PM
4 113
Are there any experiments or theories about the relation between magnetic dipole moment orientation and velocity...
Y 08:02 PM
4 171
this is a rough diagram of the picture, please note the direction of the current. that is what is throwing me off...
Y 07:48 PM
6 123
Hello, everyone. I saw this experiment: A man is doing experiment with...
Y 04:32 PM
1 107
Just a quick question. Let A and B be two points. Electrical work is defined as the amount of energy it takes to move...
Y 01:10 PM
17 422
I was trying to solve this problem yesterday and I was not able to. I looked it up its solution but my mind is not...
Y 06:23 AM
3 579
Two questions: 1.) Consider a hollow conductive sphere that's initially charged. These charges will distribute...
Y 12:13 AM
0 105
Two part inquiry PART I Situation: I have a B-field and i'm pulling a straight piece of wire through that...
Jul26-14 07:38 PM
2 141
Is there a mathematical relation for the temperature change when a fluid flows through a pipe from one end to another?...
Jul26-14 10:26 AM
38 6,392
Does all the light entering our eyes converge to a single point on the retina (assuming minimal aberration)? If this...
Jul26-14 10:14 AM
27 1,403
What is voltage and how to look at it intellectually?
Jul26-14 06:06 AM
31 2,727
Consider a light, an L.E.D for example, turning on and off once per second. For humans, we will look at it and think...
Jul26-14 04:55 AM
7 478
How does a water pump in a water cooler work?what are its parts .the picture of the water cooler is given in...
Jul26-14 04:42 AM
0 135
Hello everyone, I was wondering how one would calculate the three-dimensional charge density (per volume) in a...
Jul25-14 09:32 PM
3 232
What does p = mv really mean? For example, why is there a physical law based upon the product of mass and velocity?...
Jul25-14 05:07 PM
6 378
Let's suppose i want to send a message over really big (interplanetary, maybe out of the solar system) distances. I...
Jul25-14 01:08 PM
26 1,253
Hello. I'm having trouble with determining the dynamics of a rod, when one of the ends has a torque applied to it....
Jul25-14 09:31 AM
13 307
Today I was taking the train to a nearby city, where we passed through some rainy region. As the raindrops fell on...
Jul25-14 08:55 AM
Andy Resnick
3 548
Why is it that the width of a wire grid polarizer has to be less than the wavelength of the wave which I want to...
Jul25-14 08:42 AM
Andy Resnick
3 430
Hi, Just wanted to know the difference between permittivity and permeability. As far as I researched, permittivity...
Jul25-14 04:10 AM
1 193
If photons are oscillating electric and magnetic fields, then we should be able to deflect photons trajectories by...
Jul25-14 02:19 AM
4 367
When studying about semiconductos what are the valence band and conductivity band .what are its properties,where is it...
Jul25-14 12:06 AM
1 218
I have just completed reading an English translation (The Great Books version) of Newton's Principia and found it...
Jul24-14 12:18 PM
2 210
Hello. I saw this experiment: The light from laser is bending in small...
Jul24-14 09:24 AM
3 227
Good morning PF, I am having some difficulty finding info on calculating a composite moment of inertia. The...
Jul24-14 07:20 AM
7 798
Hi, I was wondering about the interpretation of the Hamilton Jaccobi equation. Naively we have H +...
Jul24-14 03:51 AM
1 381
What happens when charge enters the resistor?
Jul24-14 12:04 AM
6 407
I'm stuck on some highschool physics, Gauss law... 1. It says this: The electric field outside the sphere is equal...
Jul23-14 10:57 AM
Satvik Pandey
6 564
This is a question we were asked quite some time ago: Consider a circuit shaped as a rectangle, with two very long...
Jul23-14 09:26 AM
2 336
Many of you are familiar with the catapult launched profile fuselage gliders that are sold in hobby stores. Since...
Jul23-14 08:18 AM
Simon Bridge
13 651
There is a silly detail about the interpretation of the Van der Waals (VDW) equation that I cannot fully understand....
Jul23-14 07:51 AM
3 408
I want to describe the motion of a ball that rolls without slipping in a plane where acts a force field not in the...
Jul22-14 03:54 PM
4 526
Hello, It is my understanding that a moving magnetic can induce an electrical current, and that conversely, and...
Jul22-14 01:19 PM
3 1,346
Consider a circular loop of radius R that carrys a uniform current I. We know(by Biot-Savart law) that the magnetic...
Jul22-14 09:01 AM
6 500

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