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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
48,275 
The situation is as such. you have a magnetic passing through a loop(loop 1)of wire as some time t, say you also have...

May3114 02:18 AM
Delta²

5 
304 
we have an inversed pendulum(ignore the car)
http://csd.newcastle.edu.au/simulations/cart.gif
and we choose the...

May3014 06:35 PM
Andrax

3 
260 
Hello experts!
I am looking for the proof of the following equation:...

May3014 06:22 PM
jasonRF

7 
479 
The position equation for a oscillator undergoing critical damping is given by
x(t) = Ate^(γt) + Be^(γt)
where...

May3014 10:18 AM
vanhees71

1 
194 
As the spring semester is over and the summer is now beginning I was thinking that I would like to get a start on...

May3014 10:16 AM
hideelo

6 
225 
I'm reading Lanczos: 'The variational Principles of Mechanics'. I need help resolving a paradox  which is probably...

May3014 04:17 AM
Philip Wood

50 
1,460 
Lately I have been thinking about the conservation of linear momentum, and there are two cases that I can think of...

May2914 05:36 PM
DaleSpam

18 
451 
Hi, I having been looking on the internet and other threads and can't seem to find any detailed information on how a...

May2914 05:10 PM
UltrafastPED

10 
260 
Hello experts!
I wonder if there are any disadvantagês of Stêp Indêx Fibêr?
I searched for my knowledge but only...

May2914 05:02 PM
UltrafastPED

8 
254 
I was just doing a readthrough of my freshman griffith's electrodynamics textbook ( I found my comprehension of...

May2914 03:35 PM
Jano L.

3 
318 
Hey PF,
my book either got sloppy in a derivation or I am not connecting two very obvious dots.
It gives the energy...

May2914 09:12 AM
D H

2 
240 
Hello guys,
Iam doing a project to find the tension of timing belt using a dial gauge indicator,but i can't find a...

May2914 07:43 AM
CWatters

4 
336 
So what if we have two thick lenses?
Thanks in advance ,

May2914 06:46 AM
UltrafastPED

1 
198 
Why change of magnetic flux with the time through a coil induces current in it?
Please tell me that what happen to...

May2914 05:01 AM
siddharth5129

5 
299 
Hey, I don't if this is the right place to ask ( it is not a homework question but just a curious one about what i...

May2914 03:06 AM
siddharth5129

7 
280 
This question is about push bikes, but could be applied to anything with a versatile engine and a gearing mechanism.
...

May2914 01:39 AM
A.T.

3 
246 
Hello,
Im a student and I try to design a valve connected to a tank. However I have some troubles to define the...

May2814 06:53 PM
Chestermiller

1 
209 
Hello,
I need some help understanding Bernoulli's principle, flow rate, velocity and pressure.
I understand...

May2814 11:27 AM
siddharth5129

3 
457 
Hi
I am new to this forum. I am an amateur blacksmith/machinist/all around tinkerer. I took a class with a...

May2814 07:33 AM
Nugatory

4 
247 
When thinking of a spherical shaped particle moving about under Brownian motion, one describes its motion by...

May2814 07:11 AM
Steve Drake

2 
239 
Initially the pings from Malaysian airlines flight MH370 could only determine the distance of the aircraft from the...

May2714 10:39 PM
nsaspook

29 
2,271 
I am going through Mary Boas' "Mathematical Methods in the Physical Sciences 3rd Ed". I finished the chapter 3...

May2714 08:43 PM
kq6up

4 
259 
I was wondering how could I hold a lot of charge inside, for example, a ball. I thought by wrapping it in an isolant...

May2714 08:34 PM
UltrafastPED

1 
223 
Hi, I am trying to resolve a force into xyz components and I think I'm getting a bit confused.
When viewed face on...

May2714 07:03 PM
LukaD

4 
224 
I was solving a static electricity/electric field problem and I came across with one saying earth has an electric...

May2714 04:56 PM
sophiecentaur

7 
426 
Hello there, I have a problem that I've been trying to solve for some time now and I find myself struggling.
I am...

May2714 03:56 PM
mattt

1 
184 
I am aware that when charged particles accelerate or decelerate, the particle will emit a certain amount of radiation....

May2714 02:05 PM
Prince Rilian

2 
204 
What is the smallest amount of electricity (volts, amps?) required in order to create a magnet capable of spinning a...

May2614 05:21 PM
TheAzn

2 
236 
Both of these represent waves moving in the $+x$ direction. I have seen both used in Howard Georgi's book on waves and...

May2614 03:51 PM
122520253025

6 
361 
My question is simple: Why do batteries need electrolytes? Wouldn't the battery need the charge to flow only through...

May2614 02:36 AM
DrDu

3 
350 
Hi, have searched around but can't find what im looking for (probably because im not entirely certain what its called)...

May2514 02:09 PM
Jorriss

5 
348 
I read that Jones matrices can descibe optical devices with polarized light. They are 2 by 2 matrices.A basis can be...

May2514 01:37 PM
UltrafastPED

5 
332 
Hello,
I have been selflearning Thermodynamics and I am having a bit of trouble with calculating the work in...

May2514 09:20 AM
dauto

4 
279 
I have tried to search everywhere, but cannot find answer to this: does anyone know if there is a table etc. of what...

May2514 08:46 AM
Simon Bridge

1 
194 
Yeah sure, change in speed of light as it travels from one medium to another. But why does it affect the path? I mean,...

May2514 06:16 AM
Manraj singh

17 
627 
Let's say I have a magnetic ball within a solenoid that has current passing through it. How would I calculate the...

May2414 10:19 PM
Integrated

4 
286 
So I'm not OK with how some people derive this equation.
These people consider a pipe whose endings have...

May2414 05:25 PM
rcgldr

20 
607 
how much energy is gained by an electron in a battery?

May2414 04:14 PM
jtbell

4 
286 
I saw an example of a hypothetical EM wave that had constant E and B fields. Is that possible? How would it be...

May2414 09:15 AM
vanhees71

11 
511 
When a wire has current I in a magnetic field B, there is the Lorentz force is it considered a conservative force or...

May2414 09:07 AM
vanhees71

30 
887 