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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

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
atyy

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
voko

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
tonyjk

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
Matterwave

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
DeltaČ

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
davenn

4 
113 
Are there any experiments or theories about the relation between magnetic dipole moment orientation and velocity...

Y 08:02 PM
carrz

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
Orodruin

6 
123 
Hello, everyone.
I saw this experiment: https://www.youtube.com/watch?v=klt9PNuqMC8
A man is doing experiment with...

Y 04:32 PM
davenn

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
FallenLeibniz

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
Chestermiller

3 
579 
Two questions:
1.) Consider a hollow conductive sphere that's initially charged. These charges will distribute...

Y 12:13 AM
iScience

0 
105 
Two part inquiry
PART I
Situation: I have a Bfield and i'm pulling a straight piece of wire through that...

Jul2614 07:38 PM
iScience

2 
141 
Is there a mathematical relation for the temperature change when a fluid flows through a pipe from one end to another?...

Jul2614 10:26 AM
Chestermiller

38 
6,392 
Does all the light entering our eyes converge to a single point on the retina (assuming minimal aberration)? If this...

Jul2614 10:14 AM
ViolentCorpse

27 
1,403 
What is voltage and how to look at it intellectually?

Jul2614 06:06 AM
tubeswell

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...

Jul2614 04:55 AM
sophiecentaur

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...

Jul2614 04:42 AM
kartikwat

0 
135 
Hello everyone,
I was wondering how one would calculate the threedimensional charge density (per volume) in a...

Jul2514 09:32 PM
Born2bwire

3 
232 
What does p = mv really mean? For example, why is there a physical law based upon the product of mass and velocity?...

Jul2514 05:07 PM
sophiecentaur

6 
378 
Let's suppose i want to send a message over really big (interplanetary, maybe out of the solar system) distances.
I...

Jul2514 01:08 PM
GTOM

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....

Jul2514 09:31 AM
Orodruin

13 
307 
Today I was taking the train to a nearby city, where we passed through some rainy region.
As the raindrops fell on...

Jul2514 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...

Jul2514 08:42 AM
Andy Resnick

3 
430 
Hi,
Just wanted to know the difference between permittivity and permeability.
As far as I researched, permittivity...

Jul2514 04:10 AM
vanhees71

1 
193 
If photons are oscillating electric and magnetic fields, then we should be able to deflect photons trajectories by...

Jul2514 02:19 AM
carrz

4 
367 
When studying about semiconductos what are the valence band and conductivity band .what are its properties,where is it...

Jul2514 12:06 AM
e.bar.goum

1 
218 
I have just completed reading an English translation (The Great Books version) of Newton's Principia and found it...

Jul2414 12:18 PM
dkotschessaa

2 
210 
Hello.
I saw this experiment: https://www.youtube.com/watch?v=hBQ8fh_Fp04
The light from laser is bending in small...

Jul2414 09:24 AM
jtbell

3 
227 
Good morning PF,
I am having some difficulty finding info on calculating a composite moment of inertia. The...

Jul2414 07:20 AM
jamesm

7 
798 
Hi, I was wondering about the interpretation of the Hamilton Jaccobi equation.
Naively we have H +...

Jul2414 03:51 AM
vanhees71

1 
381 
What happens when charge enters the resistor?

Jul2414 12:04 AM
kartikwat

6 
407 
I'm stuck on some highschool physics, Gauss law...
1. It says this: The electric field outside the sphere is equal...

Jul2314 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...

Jul2314 09:26 AM
Nugatory

2 
336 
Many of you are familiar with the catapult launched profile fuselage gliders that are sold in hobby stores. Since...

Jul2314 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....

Jul2314 07:51 AM
atyy

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...

Jul2214 03:54 PM
jaumzaum

4 
526 
Hello,
It is my understanding that a moving magnetic can induce an electrical current, and that conversely, and...

Jul2214 01:19 PM
Tord

3 
1,346 
Consider a circular loop of radius R that carrys a uniform current I. We know(by BiotSavart law) that the magnetic...

Jul2214 09:01 AM
vanhees71

6 
500 