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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,695 
we have the wave equation as follows with non zero phase constant:
y(x,t) = ym * sin(k( x  PHI/k)  wt)
or
...

Jan2313 01:18 AM
andrien

4 
740 
My Friend and I were discussing standing waves and I made problem about speed, inspired off a concept taught in my...

Jan2213 09:31 PM
AlephZero

1 
1,807 
Hi. I was asking myself the following question.
What happens if I have a fluid at rest inside a container, and I...

Jan2213 07:49 PM
kweba

8 
1,373 
Hello. I didn't count examples about plasma at school. Never yet. I'm trying it study on my own. I do not know what to...

Jan2213 07:36 PM
Astronuc

1 
728 
Hi,
I have an application of pressure transmitter at 410 deg C max. process temperature. Transmitter can withstand...

Jan2213 05:54 PM
ednalds

2 
612 
Hi if you have a galvanic cell, with Zink at the anode and Cu at the catode, which force then makes Zn electrons go to...

Jan2213 04:55 PM
Simon Bridge

1 
483 
I know the radius of a circle. I'm taking pictures of the circle as I bring it closer to the camera. Obviously the...

Jan2213 03:26 PM
jtbell

1 
619 
Hi all,
For an exam I'm required to be able to plot the PDF of a fluctuating velocity function, say u(t)=sint(wt), ...

Jan2213 03:14 PM
pobatso

5 
801 
So, until now I know:
(DV/DS)p=(DT/Dp)s=a*T/cp*(rho) (enthalpy)
(Dp/DT)v=(DS/DV)t=a/k (helmoltz)...

Jan2213 02:21 PM
tsuwal

2 
1,920 
I'm new to the subject of plasma (and to the forum) and would like to find some book or online information on "phase...

Jan2213 01:13 PM
marciopfrs

0 
487 
Dear all,
I have a question on the derivation of the drift velocity in a conductor, and was wondering if somebody...

Jan2213 01:04 PM
vanhees71

5 
1,116 
Here and there I come across the following formula for the Lagrangian density of a real scalar field, but not a...

Jan2213 11:03 AM
snoopies622

6 
890 
Hi,
I have an issue with the Fresnel amplitude coefficients. I know they are given in two versions, for...

Jan2213 12:58 AM
Nono713

0 
645 
I wanted to figure out the temperature(t2) of any object based on things such as its specific heat capacity, reentry...

Jan2113 11:59 PM
Ryoko

1 
690 
Hello all,
This is just a question i have... I need to know the frequency (in order to meter it) from an...

Jan2113 11:08 PM
berkeman

6 
1,009 
Hi
I can understand how once an object is falling in converts PE to KE. My question is how does it move in the first...

Jan2113 07:04 PM
IsometricPion

46 
3,867 
I am trying to understand how the Lorentz force affects bulk fluid motion when I have an applied electric field...

Jan2113 05:26 PM
MagnetoBLI

0 
689 
Say there is an empty bottle of coke., and you know for sure that
the bottle resonates most at 320hz.
when the...

Jan2113 10:15 AM
sophiecentaur

6 
1,799 
As I figure , there no reason why this would not work: object orbiting a planet in one direction, then, half way...

Jan2113 10:11 AM
Edi

52 
3,993 
Trust me this is not homework... My last two questions were removed cause they looked like homework... I understand...

Jan2113 10:07 AM
LastOneStanding

10 
1,255 
A Capacitor stores energy when it is charging up but what is the intuition behind such a process ?
I, in fact,...

Jan2113 10:04 AM
sophiecentaur

18 
2,043 
According to Carnot's theorem η≥η' where η corresponds to a reversible machine and η' is not necessarily reversible,...

Jan2113 06:22 AM
facenian

10 
932 
http://img842.imageshack.us/img842/7200/img0103iu.jpg
Mainly concerned with the first half of the page. You'll see...

Jan2113 03:06 AM
DrDu

13 
1,418 
I was thinking about meteorioids and how upon their entry into the atmosphere the large amount of disintegration they...

Jan2113 01:28 AM
Skyler0114

6 
1,154 
Hi everyone!
I'm struggling to get my head around a calculation having not done any physics studies for 10 years ...

Jan2013 11:56 PM
Sylvia Else

13 
1,647 
Hi there,
I'm looking to find the most probable speed of atoms ejected from an oven.
Temp (T) is 900°C (so...

Jan2013 04:37 PM
AlephZero

1 
1,008 
i was trying to verify the '8 years 7 months 6 days' myth/fact that states that you would have you scream for that...

Jan2013 11:58 AM
utkarsh5

4 
920 
1.assume i am riding a motorcycle at 100km/h, but i ride the motorcycle inside a very long train which is moving at...

Jan2013 07:54 AM
Drakkith

11 
1,472 
Can a substance only evaporate at the T(sat) at that particular pressure and why not even at a higher temperature?
...

Jan2013 05:34 AM
mfb

1 
473 
Due to my job and other classes, I've been studying ahead of my class by myself to not fall behind and I'm not sure if...

Jan2013 03:58 AM
DiracPool

3 
881 
I have a question regarding Inertia. Exactly how much force, in Newtons, is required to overcome the inertia of...

Jan2013 01:01 AM
Tik

5 
773 
Hey guys, I need some help calculating a volume.
Ok, so say we are given a pressure vessel with an 88ci volume @...

Jan1913 08:07 PM
cjl

1 
573 
Here is an extract from my Physics textbook.
According to classical physics, each of these standing waves carries...

Jan1913 05:56 PM
Philip Wood

11 
1,864 
I have always thought of G.P.E as how much a constrained body wants to fall in the direction of Gravitational Force...

Jan1913 05:06 PM
Drakkith

4 
721 
The next situation is presented
2 big circles (blue ones) are rotating in different directions. The left one is...

Jan1913 01:47 PM
Richard_Steele

9 
1,157 
When you write an action and then you calculate its minima, how can you be sure that they are minima and not maxima?...

Jan1913 02:43 AM
andrien

2 
473 
Hi,
Do you know systems that generate CEMF?
Set ups like an Electric Motor? What other system do you have in...

Jan1813 07:19 PM
Drakkith

1 
549 
Hello,
I have looked through various websites, which show single glazing heat losses (Ufactor) to be 5.7 W/m^2.K....

Jan1813 05:38 PM
AlephZero

3 
649 
Hi, I'm reproducing a measurement of vibrations and I would like your help with a certain question I have.
I have a...

Jan1813 05:08 PM
BenG549

1 
583 
Hi,
I'm trying to find a toy (i.e. analytic) example of a nonlinear system that has very different behavior for two...

Jan1813 04:44 PM
nickthequick

0 
499 