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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,722 
Hi,
when i am doing an experiment that uses two polarizers (Cross) to achieve complete annihilation of light,
...

Feb1312 09:56 AM
quietrain

4 
822 
Another stupid thing I've come across and thought; what?
Mainly down to not having many example questions to look...

Feb1312 06:54 AM
tinytim

9 
2,110 
I'm on pg 56 of Thorton's Classical Dynamics book and I see this: Imgur Link
Two questions: 1) Where does the 2 go...

Feb1312 02:01 AM
richukuttan

3 
1,044 
Why does the air flow faster over the wing? In my fluid mechanics course we used streamlines and a half body to show...

Feb1212 10:16 PM
Stan Butchart

105 
17,211 
For an E&M wave normal incident on an interface, the electric field is given by
refraction: E'/E0=2n/(n'+n)...

Feb1212 09:03 PM
sifangyou4

0 
1,134 
Hi,
Our sensation of weight is given by gravity together with normal forces. It is said that in a swing you'll feel...

Feb1212 05:41 PM
willem2

3 
1,141 
Hi everybody,I want to know the formula of the coil force to the plunger that related between F,length of...

Feb1212 02:16 PM
EhsanHejazi

0 
871 
I do not really understand the reason why Carnot ideal engine needs 4 cycles: isothermal expansion, adiabatic...

Feb1212 01:41 PM
Andrew Mason

7 
1,516 
When dealing with electrodynamics it is usual to use complex variables for the electromagnetic field while taking into...

Feb1212 03:55 AM
Jano L.

2 
1,279 
One day I just put on my polarized sunglasses, and on the road, I looked at cumulonimbus cloud probably in the...

Feb1212 03:21 AM
Drakkith

1 
942 
This is my first post and I'm still a wee physics newbie, though I've learned much from these great forums in the...

Feb1212 12:36 AM
superalias

2 
1,787 
I would like to determine the equation describing the trajectory of an object using data from 2 distance sensors. I...

Feb1212 12:36 AM
xts

5 
1,080 
Hi,
I am trying to understand the reflectivity from metal surfaces, but I'm stuck... I am finding contradicting...

Feb1112 09:31 PM
iLIKEstuff

16 
3,265 
says that the pressure is distributed evenly around a fluid.
What I'm having a hard time understanding is the...

Feb1112 07:49 PM
jambaugh

30 
2,534 
I have (conceptual) questions about this question posted before:
...

Feb1112 02:16 PM
Naty1

1 
1,218 
I am trying to find a material that appears to be a solid color, but when something is pressed up against it, it is...

Feb1112 02:13 PM
dlazzara777

0 
1,332 
Hi everyone ! This is my first post!
How can we prove that during the reflection of an electromagnetic wave on the...

Feb1112 11:56 AM
megaflop

5 
1,153 
Are principal strains necessarily tensile/compressive or can they be shear strains also? And are the principal strain...

Feb1112 11:28 AM
boneh3ad

3 
768 
Hi
When solving BiotSavarts law for a current loop of radius R, the magnetic field on the axis of the loop is...

Feb1112 10:09 AM
Dadface

1 
924 
Hi all, got a bit of an experimental/theoretical confusion here.
A group of us are doing an investigation into...

Feb1112 09:23 AM
Scorpii

6 
1,789 
wrong place sorry

Feb1112 07:12 AM
Mulecc

0 
926 
Hi,
This is my first post in here. Do you know of any example of a Hamiltonian which is quadratic (x^2, xy type...

Feb1112 02:39 AM
Sagar_C

0 
773 
So I've been reading Hehl's Foundations of Classical Electrodynamics  which builds up Electrodynamics from a six of...

Feb1012 08:39 PM
jjustinn

0 
889 
Hi Forum..I have an interesting physics problem I have been working on. I have come up with an answer but I hope...

Feb1012 02:41 PM
James_1978

0 
1,014 
Hi
Say I am looking at an AOM working in the Bragg regime (i.e., only a single diffracted beam). It is easy to show...

Feb1012 01:05 PM
Niles

3 
920 
Lets suppose that we setup two instances involving two masses m1 and m2.
m1 > m2
Case 1. The two bodies are...

Feb1012 12:33 PM
IsometricPion

3 
920 
EDIT: Ooops, the title says sphere, but it is a cylinder. I cannot edit the title.... sorry...
I saw this problem...

Feb1012 12:23 PM
spamanon

4 
1,094 
I'm afraid I need some help on this one. We are studying rotational dynamics and I read in my textbook, the...

Feb1012 11:08 AM
Philip Wood

92 
21,626 
The initial presentation of Newton’s Laws of Motion (NLM) to students often proceeds as follow: 1. The 3 laws are...

Feb1012 09:35 AM
D H

40 
3,738 
If a human were to wear a jetpack and could fly at the speed of sound, what would he feel? Would he feel the sound...

Feb1012 08:21 AM
boneh3ad

31 
2,967 
Hi all,
I'm currently trying to model at what points does beam bending become more membrane like under a force from...

Feb1012 06:26 AM
Caveman11

0 
1,182 
I'm trying to understand a problem someone gave me recently. there is a frictionless track that initially starts flat...

Feb1012 05:23 AM
gsal

1 
648 
Does there exist a device to convert a unidirectional linear motion into a rotational motion? I have only been able to...

Feb912 10:43 PM
bp_psy

16 
7,042 
Hey,
About Newton's Second Law. To compute our weight on Earth using standard g, we use F=ma replacing F and a with...

Feb912 10:26 PM
nDever

13 
2,212 
Hello Forum,
I understand the difference between LEDs and lasers: both operate at optical frequencies, but the LEd...

Feb912 06:32 PM
fisico30

4 
803 
i am not a student
i am 52 years old , and i am production engineering
i like to solve some mechanics problems when...

Feb912 05:02 PM
Drakkith

1 
1,052 
http://science.memebase.com/2012/02/09/funnysciencenewsexperimentsmemesastaticorbitgetit/
An amusing NASA...

Feb912 04:53 PM
Dotini

0 
802 
I was hoping someone could help me with a project I am doing. I have contacted a manufacturing company thatmakes...

Feb912 04:44 PM
pityocamptes

2 
1,127 
For conventional current, they say that it moves from high potential to low potential. What does this mean? pd at a...

Feb912 05:27 AM
gsal

2 
1,066 
I am trying to find a succinct definition of normal coordinates and normal modes  relating to numerous coupled...

Feb912 04:53 AM
SK1.618

0 
1,458 