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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,970 
The equation for this physical model is:
http://upload.wikimedia.org/wikipedia/commons/f/fb/RLC_series_circuit_v1.svg...

Jun914 09:24 AM
Born2bwire

1 
201 
I'm developing a classical model of a dipolar ion in an external electric field. It consists of two charges...

Jun914 09:21 AM
DrClaude

2 
225 
How would be the 2nd Kirchhoff's law for this circuit here:
...

Jun914 08:25 AM
CWatters

8 
266 
If in a typical complete circuit (RLC) we have a resistor with resistence R, an inductor with inductance L and a...

Jun914 08:00 AM
Simon Bridge

18 
414 
A ideial voltage source has:
v = v
i = ?
R = 0
L = ?
C = ?
ideal current source:
v = ?
i = i

Jun914 06:16 AM
Nick O

14 
258 
How equate the voltage/current of the associated sources with the voltage/current equivalent?
...

Jun914 05:26 AM
Jhenrique

14 
279 
This is sort of statics, but this came up in my physics class before.
You have a plate, supported only in the...

Jun914 12:40 AM
Simon Bridge

3 
187 
I am reading introductory physics from Serway. Where they say if a_r is radial acceleration and a_c is centripetal...

Jun914 12:33 AM
D H

3 
254 
If invisid flow starts with no vorticity then no vorticity will be produced. This can be understood
intuitively: we...

Jun814 11:31 PM
boneh3ad

3 
208 
The concept of a problem is that if rockets continue to jettison fuel, at some point they will get a very small...

Jun814 08:13 PM
MSpeezy

8 
293 
If we know the initial momentum of particles a and b (mass a and b, initial velocity of a and b),
is it possible...

Jun814 06:14 PM
mathman

2 
137 
All the derivations of the RayleighJeans 'Law' I've seen assume that the electromagnetic radiation is enclosed in a...

Jun814 05:51 PM
Jano L.

8 
280 
If a battery has 6V of voltage, this means that P+ – P– = 6V or that P– – P+ = 6V ?
Being:
P+ = electric potential...

Jun814 04:03 PM
UltrafastPED

7 
213 
What's the mechanism behind things like sparks, lightning, St. Elmo's fire, etc.? I've heard two different...

Jun814 01:28 PM
ZapperZ

2 
212 
How does friction come about using the four forces?

Jun814 10:49 AM
adjacent

3 
198 
The current always prefers the path with minor resistance, but how the current reacts wrt the inductance and...

Jun814 02:44 AM
Jhenrique

2 
152 
Hi, there
Today, a friend came to me and asked the following questions and they made me confused.
If the source is...

Jun714 09:04 PM
Robert_G

1 
185 
To be concrete, consider two parallel conducting plates, one positively charged and the other negatively charged. Why...

Jun714 06:17 PM
nsaspook

7 
207 
I am referring to "Newton's bucket"  essentially a hollow cylinder filled with water inside which rotates about the...

Jun714 06:03 PM
BruceW

3 
233 
I had a question that was on my mind for a while. The general question is about structures and a force on that object...

Jun714 04:26 PM
vaart

4 
225 
I'm new to physics, so I'm sure the explanation is very simple, but I cannot wrap my head around Newton's 2nd law...

Jun714 03:31 PM
Astronuc

6 
591 
Consider an inertial frame where an electric current is flowing in upward direction, a magnetic field is created and...

Jun714 02:34 PM
WannabeNewton

24 
454 
I've attached a graph to this post. Why is it that the periodic external frequency applied never starts at 0 on graphs...

Jun714 12:58 PM
AlephZero

3 
145 
Charge is the most fundamental quantity.
consider a point charge Q to simplify our mental picture:
Q will give...

Jun714 09:59 AM
ugenetic

11 
292 
I have been looking for specific heat capacities of certain materials such as steel but i can never find a solid...

Jun714 09:40 AM
Andrew Mason

9 
237 
A test question I was asked earlier in the year has been hanging around in the back of my mind:
"If a radio is...

Jun714 08:16 AM
Impulse

4 
194 
Which is the real interpretation for current source? Exist some device or electrical object that acts like a current...

Jun714 06:04 AM
jasonRF

16 
314 
I was working on a project for which I was considering letting a liquid flow out of a bottle rather than pump it out,...

Jun714 12:41 AM
SteamKing

2 
136 
Exist some physical quantity for the derivative of the current wrt time? Exist another too for the derivative of the...

Jun614 10:50 PM
Jhenrique

3 
189 
I was thinking, a circuit don't need necessarily be a circuit, can be something like this:
...

Jun614 03:20 PM
Drakkith

7 
172 
The interpretation for charge and current through of a circuit is known... "the current is the motion of the charges,...

Jun614 08:30 AM
Jhenrique

2 
172 
This thing has confused me for long .I have not come across any satisfactory answers on my own or while browsing...

Jun614 08:28 AM
Philip Wood

3 
201 
I know that in electric circuits charge imbalances can build up on capacitor plates, wire bends, and antennas. But is...

Jun614 02:59 AM
vanhees71

15 
354 
Can the same force increase both the translational and rotational kinetic energy of a rigid body? If yes then the work...

Jun614 01:24 AM
paisiello2

1 
178 
I have two independent variables (rotation in degrees, and distance from best focus distance in mm) and one dependent...

Jun514 01:52 PM
gobberpooper

0 
152 
In an eletric circuit, can exist nonzero voltage and zero current? Can exist zero voltage and nonzero current?
What...

Jun514 01:04 PM
cabraham

3 
204 
The Kirchhoff's circuit laws are what there are of better for compute the current and voltage in anywhere of a...

Jun514 11:36 AM
DaleSpam

4 
203 
I have to calculate the amount of thermal energy due to friction, it will be rolling friction if that makes a...

Jun514 09:52 AM
Simon Bridge

1 
178 
Hello, first time poster here! :smile:
I need to find the speed of air directly coming out of a nozzle connected to...

Jun414 09:56 PM
boneh3ad

9 
3,180 
I get the theory:
Fc = Ft + Fg
Uniform circular motion, in the vertical plane.
Fc = net force = centripetal...

Jun414 02:26 PM
PhanthomJay

18 
555 