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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,704 
I understand what electromagnetic induction is and its applications. However, I don't understand why this occurs is...

Jun310 05:55 PM
cabraham

4 
1,075 
Hi,
Newton's 2nd Law can study the motion of the objects in the case of zero net force:
F = ma
if F = 0 then...

Oct2212 04:59 PM
russ_watters

8 
1,271 
Hi,
Why do oil and water not mix? We know that some liquids mix together while others not, I am looking for the...

Feb1913 05:47 AM
bgq

2 
652 
Hi,
Consider a block of mass M connected to a spring of mass m and stiffness k horizontally on a frictionless...

Feb1913 05:49 AM
bgq

3 
789 
Hi,
1) Do we calculate torque with respect to a point or with respect to an axis?
I have read them both in...

Feb2413 08:00 AM
bgq

6 
628 
Hi,
What is the difference in the setups of the Young's double slit experiment and the two slits diffraction?
I...

Mar513 10:20 AM
sophiecentaur

11 
1,060 
Hi,
Consider a ball rolling upward without slipping on an inclined plane. What is the direction of the force of...

Mar3013 09:21 AM
bgq

4 
879 
Hi,
Consider a charged capacitor connected to a an empty capacitor. The charged capacitor starts to discharge while...

May913 11:33 AM
bgq

3 
605 
Hi,
After reading several resources about work and energy, I am confused about the conditions that should be...

Aug113 05:33 PM
Jano L.

1 
615 
Hi,
I know that for a massless spring the tension is T = kx, where k is a constant and x is the compression or...

Aug613 10:51 AM
AlephZero

7 
631 
Hi,
Is it possible that the medium of lesser density has larger index of refraction? If yes, please give me some...

Aug2113 07:52 AM
Abhilash H N

1 
317 
There is an idea that Kirchoff's voltage law could not be applied to circuit containing coils like this link.
...

Aug3113 06:45 PM
mfb

8 
426 
Hi,
Consider a spring of stiffness k and mass m. If we stretch  simultaneously  both ends of the spring by force...

Oct713 11:26 AM
jbriggs444

5 
588 
Hi,
Consider a vertical relatively long cylinder of constant radius open at both ends. We fill this cylinder with...

Oct1213 10:49 AM
bgq

6 
611 
Hi,
Is Newton's 3rd law applicable to electric charges?
I have a problem with a situation where two identical...

Jan1514 08:25 AM
ASG141

2 
349 
I wanted to ask which would provide the largest total BTU cooling regular ice from water or dry ice to reach a...

Mar2609 04:14 PM
mgb_phys

1 
2,552 
Here is the run down first, I'm trying to find a min mass flow rate for my project which needs to be 1 GPM, and max 4...

Apr712 08:49 PM
bhaarat316

2 
921 
Say I have a copper wire connecting the earth and the moon (or some other large distance). The Earth side is touching...

Feb314 12:32 PM
sophiecentaur

16 
394 
The D field due to a point charge(Q) has a divergence zero
D = (Q/(4*pi*r2)) ar ...

Aug2010 01:53 PM
gabbagabbahey

5 
1,373 
as per diagrams in textbooks, if incidence angle = critical angle then the ray should travel straight until it reaches...

Feb1210 08:05 AM
sophiecentaur

9 
2,497 
just out of curiosity  it seems evident to me that the capacitance of a conductive body should be between the...

Oct2609 07:52 PM
bhh1988

0 
1,457 
I was watching a fascinating video about the people who work on live power lines they are lifted to them by...

May1012 03:18 AM
davenn

5 
1,626 
I'm trying to understand how to do diffraction problems with apertures and don't really understand how to work...

Apr2311 11:45 PM
Bhumble

0 
473 
A 1D metal put inside a E0 electric field just like shown in following figure.
>  < + >
> ...

Jul708 08:06 AM
Domenicaccio

7 
1,375 
who has the Electric Permittivity of Nobel Metal?
Especially, Gold and Silver at different wavelength?

Jul308 11:53 PM
BiBByLin

0 
4,037 
In multipole, the electric quadrupople interaction with incident electric field:
...

Jul1008 11:29 PM
BiBByLin

0 
1,505 
In Richard Feynman's book QED, when writing about multiplying arrows of photons (on page 61 if you have the book...

Nov1904 10:45 PM
BiBi

2 
2,098 
My physics professor gave us an extended version of coulombs law which includes terms to account for moving charges....

Apr1711 10:23 AM
Meir Achuz

4 
760 
Hi everyone, just some background informationI work in an emergency department as a trauma tech. My coworkers and I...

Jun1011 10:31 PM
berkeman

77 
7,829 
Hi guys,
I've been thinking on a problem for a while which really bothers me. I've been trying to mathematically...

May3113 06:25 PM
Biederman

4 
540 
Hi all  thank you for this forum  it's proving very helpful:
Am I correct in thinking that if we measure a period...

Apr1413 03:09 PM
vanhees71

4 
738 
To find the magnitude of a force between two charges is very simple, but to get the direction of the force seems a...

Sep604 10:52 PM
bifodus

4 
1,049 
I'm taking a first semester electricity and magnetism class and my teacher is quite a bit more rigorous than the...

Oct504 07:12 AM
robphy

1 
1,036 
I have understood that Q=heat absorbed, ΔU=energy change, ΔH=enthalpy change, W=work done by system = Δ(PV)+Wmech...

Mar1013 09:44 AM
Chestermiller

11 
1,088 
My mechanics syllabus suggests that we can model acceleration as ##v(dv/dx)## but what exactly does this mean? Can you...

Mar1213 08:47 PM
elfmotat

4 
687 
How do we write differential equations for projectile motion in 2 dimensions featuring air resistance of magnitude...

Sep3013 03:38 PM
Nugatory

19 
1,134 
I know that ΔS=qrev/T for any process, but what is qrev here? It can't be identical to the q in ΔU=q+w  if it was,...

Nov1813 06:59 AM
Chestermiller

13 
978 
I've got a few issues with the topic of thermodynamic expansion, ΔU, etc.
With ΔU=q+w, this w is to mean work done...

Jan1314 06:37 AM
Chestermiller

23 
927 
I posted a question as thus :
A train moving at 100 km/hr uniformly decelerates at a rate of 10 km/hr each hr. How...

May507 09:13 AM
ZapperZ

7 
1,572 
Here's the problem: you've got two carts sliding along frictionless tracks at an equal speed, etc... as they move...

Dec1910 06:40 AM
Doc Al

15 
2,399 