The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...

Apr814 10:13 AM
ZapperZ

166 
160,202 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Apr2211 05:27 AM
ZapperZ

2 
63,627 
Hi,
The Gilmore equation is associated with bubbles in gas. When equated to a massspring system, you get the...

Jan1413 09:13 AM
nasu

1 
549 
I need to figure out the best way to improve drainage of spring water flowing through my property.
The water from...

Jan1413 04:30 AM
Studiot

19 
1,710 
They have the spin top magnet that you spin on top of a platform, which by effect causes it to appear to float. Is the...

Jan1413 04:29 AM
sophiecentaur

1 
562 
hi
i have a doubt about magnetism
i am assuming that magnetism is caused by spinning electric flux
if we change...

Jan1413 04:12 AM
boletoms

6 
906 
I guess the title gives it all. I understand the concept on a basic level. What i don't understand is that how does it...

Jan1413 04:04 AM
sophiecentaur

19 
1,673 
I'm working on a project, I just need ballpark estimates for the spring constant and damping coefficient for my 1994...

Jan1313 06:13 PM
zacharoni16

7 
902 
I'm looking for a list of inference rules used in physics derivations. I think this would be distinct from Wikipedia's...

Jan1313 02:36 PM
benno

0 
743 
Hello,
Is there any difference between 50/60 AC current and a 50/60 Hz photon stream/electromagnetic wave...

Jan1313 01:26 PM
anorlunda

19 
2,333 
I essentially want to understand weather or not an aerofoil with a zero attack angle will generate lift, i.e. using...

Jan1313 07:02 AM
CWatters

17 
1,249 
We have to build catapults in school and the teacher wants us to hit targets placed 24 meters but to get it to go a...

Jan1313 06:55 AM
CWatters

2 
684 
I read somewhere that the focus of a plane mirror is at infinity because rays after reflection from a plane mirror...

Jan1313 06:00 AM
LowQ

2 
582 
How is (density)(gravity)(height) supposed to equal pressure?
density = kg/m^3
gravity = m/s^2
height = m
...

Jan1313 03:03 AM
cytochrome

2 
591 
Is the right hand rule for determining the direction of the magnetic field, force, and current only used when the...

Jan1213 11:12 PM
TheAbsoluTurk

3 
745 
Since temperature is no more than vibrating atoms (in Feynman's words), wouldn't that induce a changing electric...

Jan1213 08:17 PM
0xDEADBEEF

1 
544 
I kindly ask for assistance in derivation of the equation for instantaneous power in an electric circuit, P(t) = V(t)...

Jan1213 05:29 PM
Studiot

1 
707 
Hello,
I am trying to derive the mutual inductance between the two coils of a transformer. I want to do this for...

Jan1213 04:05 PM
w1002644

0 
692 
Absolute zero is the theoretical state in which a system reaches 0K, or NO energy present right? And if gravity...

Jan1213 11:18 AM
0xDEADBEEF

12 
1,179 
I was thinking about olbers paradox and how I could apply it to gravity.
We assume that their are an infinite...

Jan1113 06:00 PM
mfb

3 
839 
I am looking at the crosssectional shape of a sagging membrane. I have several theoretical models, neither of which...

Jan1113 04:21 PM
Chestermiller

2 
860 
Hi,
This question is about a discussion in the two chief world systems, the second day about p 230 in the modern...

Jan1113 04:13 PM
zoobyshoe

5 
892 
Hi, yesterday my dad and I were debating whether flow rate stays constant throughout a system. I told him we learned...

Jan1113 01:59 PM
Studiot

18 
848 
Hello, comparing the formula of gravitational attraction with F = m*a you get that the smaller mass disappear.
I...

Jan1113 01:29 PM
bahamagreen

28 
1,808 
I have two springs, they are connected in series.
I have the loaddeflection curves for each spring.
How can I...

Jan1113 10:26 AM
lovi

2 
494 
When a rocket is launched there is an upthrust which is provided by the combustion of its engine. However, during the...

Jan1113 10:24 AM
BruceW

27 
2,173 
I am having trouble puzzling this one out. What I am trying to understand is why the tension of a rope is uniform...

Jan1113 09:52 AM
Studiot

12 
1,777 
First post here. Hello!
I am wondering how close a bouncy ball's bounceback ration can get to 100% with our current...

Jan1113 08:29 AM
LowQ

5 
844 
i was reading an example of area calculation of a nozzle,in which mass flow rate was and coeff. of discharge (ratio...

Jan1113 03:18 AM
engnr_arsalan

0 
528 
The title says it allI'm working through The Feynmann Lectures, and came across the assertion that a magnetic field...

Jan1013 10:33 PM
demoncore

0 
789 
hi All,
I recently got interested in a general solution to diffraction from an object at verious distance and...

Jan1013 01:55 PM
Gobil

4 
855 
I have a question about efficiency of electrical heating vs. mechanical heating.
Let me explain an example:
I...

Jan1013 01:47 PM
engnr_arsalan

5 
890 
Hi All,
This is a bit long, so only read on if you have too much time on your hands...
Clinically its important to...

Jan1013 09:12 AM
simondon

0 
760 
Hello,
I am reading a paper in which the author describes how he scales the velocity profile of a car.
He is...

Jan1013 08:49 AM
Chestermiller

6 
942 
I've never heard it said before but it appears to me that all electrical current that flows in a solid state component...

Jan1013 06:58 AM
sgb27

13 
1,366 
what is the value for our solar constant?

Jan1013 06:02 AM
mfb

1 
428 
Is it the case that the laws we have set for our universe and the proportionality constants which help define those...

Jan913 09:59 PM
Simon Bridge

3 
1,031 
Hello
I have a diffusion profile, in which I plot the decrease in concentration versus distance of my sample. I...

Jan913 09:01 PM
Chestermiller

4 
674 
Hi all. I was wondering about a particular kind of toy train that is sold to young children these days. I bought a few...

Jan913 08:54 PM
pantaz

9 
971 
Hi,
I put an overturned bottle inside a container filled with 0.5 m of water but water didn't enter inside the...

Jan913 02:16 PM
jbriggs444

3 
609 
What is a syphon breaker???
And how does it work???

Jan913 02:14 PM
charlie95

2 
834 
can small piezoelectric disks 3.7x3.7 cm inside a tube with a buzzer at the other end be able to power an LED

Jan913 01:52 PM
jedishrfu

1 
514 