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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,718 
Hello,
A very basic question, with a bit of confusion.
a ball hitting a wall which is not moving with velocity v...

Apr1310 07:11 AM
Doc Al

9 
7,038 
ok, the qn is..
a ball is dropped from H height. it bounces with restitution e. hw much distance will it cover before...

Apr1510 04:44 PM
Zeus0

9 
5,156 
This is a very quick question but in the equation
e=1Q_{C}/Q_{H}
do we treat both Q's as positive even though...

Apr1410 10:01 AM
AYANTAYO

5 
1,226 
Hello everybody! :D
Im building a tesla coil for a science fair and needed some help with it. For the toroid, I got a...

Apr1210 07:25 AM
Voliminal

5 
2,759 
the total amount of energy able to do work is the gibbs free energy of a reaction.
dG=dHTdS
according to this...

Apr1410 11:10 PM
gladius999

13 
2,172 
Okay, so say that I stack three boxes, one on top of another. There is friction between all surface, including the...

Apr1210 07:33 PM
jack action

3 
3,606 
I am trying to compute the amount of energy received by the Earth from the sun, by integrating over the Earth's...

Apr1310 05:46 PM
ecklstn36

2 
660 
I want to calculate the difference in temp between the bottom & top of a hot water tank,
Presumably the height of the...

Apr1210 09:52 AM
skeptic2

5 
2,112 
Hello, I have a simple question. Lets say we have a mechanical system with 2 degrees of freedom. Say the generalized...

Apr1310 05:07 PM
DoubleHelics

11 
1,577 
I'm a bit confused about how the Lorentz Force (as a law) stands in relation to the laws of Maxwell (independent of...

Apr1610 10:28 AM
elect_eng

14 
2,197 
I've been told for many years now that the speed of newtonian gravity is infinite. However, I've never received an...

Apr1310 05:18 PM
Cleonis

9 
1,463 
Please explain in detail about toggle joint, especially about its mechanical advantage.

Apr1410 10:25 AM
Ali Asadullah

1 
2,675 
If I have a gear system that consist of 2 gears that are meshed together
the first has 16 teeth which is the driver...

Apr1310 12:04 PM
Lsos

13 
2,441 
If you compress a gas in a piston(a monoatomic perfect gas for instance), what is the equation that gives you the...

Apr1210 09:36 AM
Andrew Mason

1 
1,064 
Trying to calculate the impact of an 8000 lb. truck moving at a rate of 55mph, hitting a 200 lb deer that is standing...

Apr1210 05:12 PM
sophiecentaur

5 
5,079 
I just read a problem 2day...it's on linear thermal expansion of soild...can anyone guide me through....it says..." A...

Apr1210 01:57 PM
tinytim

1 
994 
Hi
Is it me, or is the polarity on the voltmeter wrong for this mutual induction example.
...

Apr1210 06:32 PM
azaharak

2 
792 
I understand how to figure the magnetic field of an air core electromagnet, but apparently bitter magnets are slightly...

Apr1410 06:40 PM
lamonster

8 
1,222 
Hi everyone just wondering if someone could help me with a problem I'm having on a piece of work atm,
I'm currently...

Apr1210 08:44 PM
MikeUK

0 
453 
This is the first time I've ever been to this forum, so I'm hoping this is an appropriate place to post this. It's...

Apr1410 05:29 PM
Obediah2

4 
3,268 
Hey all,
just a quick question, what are localization modes for a 1D chain? I can't find anything on the...

Apr1410 11:47 AM
tak160

0 
591 
I kind of understand Lenz's law but was wondering if anyone could tell me were does lenz's law acutally occur in...

Apr1310 07:20 AM
cabraham

1 
632 
Hi, I am a noob to physics trying to get a better understanding of rigid bodies.
How do I calculate the torque,...

Apr1310 03:17 PM
log0

4 
1,844 
let dx=FdX, where F is the deformation gradient tensor and dx and dX are line elements in the current and reference...

Apr1310 10:12 AM
lavster

0 
522 
I'm going over the notes from my thermodynamics course, with the aid of Feynman I (p4412).
Feynman uses the...

Apr1610 09:23 AM
Count Iblis

59 
3,404 
The other day, I was arguing that a car traveling 70mph rearending a car traveling 55mph is the same as a car...

Apr1310 05:32 PM
tinytim

2 
773 
Hi all,
The situation is this: I need to calculate the self inductance of two solenoids wired in series, of equal...

Apr1510 03:36 PM
individual61

2 
6,524 
I'm confused by the definition of electric current. It is commonly defined as the time rate of change of charge...

Apr1410 01:23 AM
annumarch

4 
2,147 
Ok, I am writing a comic book that takes place on a city sized space station. I have planned for somewhere between...

Apr1510 04:21 PM
Bob S

11 
1,376 
Hi,
I'm having trouble understanding where the formula (appearing in my notes or Wikipedia) comes from.
One can...

Apr1310 04:59 PM
trelek2

1 
1,571 
I was in the shop the other day cutting holes out of a 20inx20inx.25in piece of plywood and I noticed that the hole...

Apr1410 06:11 AM
chessismyfort

0 
1,044 
does the shape of electric field lines change from being sinosidal away from the oscillating charge? please see...

Apr1410 08:57 AM
tasnim rahman

0 
1,107 
Why is the magnetic field outside a conductor zero?

Apr1410 09:53 AM
nonequilibrium

1 
945 
As you know some trucks (tankers) always have a chain or wire underneath to discharge electricity. My question is...

Apr1410 11:53 AM
pixel01

11 
850 
Almost everything is clear to me as far as the reason for the precession of a bicycle wheel suspended by a string from...

Apr1410 01:06 PM
Amith2006

2 
1,843 
The problem was to give the charge distribution of a uniformly charged disk of radius R centered at the origin and...

Apr1610 01:43 AM
DaleSpam

3 
2,604 
Let's say that L=((1/2)m*v^2V(x))*f(t), or something similar. What are the equations of motion? For time...

Apr1510 05:25 AM
cheeseits

0 
1,364 
Hi,
I have a motor home that rocks quite a bit when entering driveways, speed bumps, etc. I've added some mods...

Apr1510 08:26 PM
Navion

0 
1,080 
In general the electronic susceptibility, χ, is a function of frequency and is complex for a dielectric medium.
So...

Apr1610 06:42 PM
Antiphon

1 
1,280 
I am considering the equivilence between BiotSavart's Law and Ampere's Law for a current loop. The form of the...

Apr1610 03:12 PM
elect_eng

1 
1,702 