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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
48,174 
In the physics section there is doubt, that a mathematician would object to deriving something by dividing an equation...

T 08:54 PM
DaleSpam

24 
376 
Is there a mathematical relation for the temperature change when a fluid flows through a pipe from one end to another?...

T 08:37 PM
Jay_

160 
10,835 
I attached an image of two expansion cases I am analyzing. Both cases involve an insulated cylinder that is divided by...

T 07:23 PM
pyroknife

34 
268 
I'm currently going over some mechanics notes and am confused about the following situation:
In the book I'm...

T 06:06 PM
voko

10 
118 
Hey all,
I just started a fluid mechanics class and I'm having trouble interpreting the physical meaning behind...

T 04:30 PM
SteamKing

4 
86 
Having recently completed a session on the simple pendulum in physics, I was curious as to what the solution to...

T 02:39 PM
voko

4 
127 
If a metallic ball is place under a giant hollow top, and the top starts to rotate. Along with the top, the metallic...

T 02:00 PM
mfb

1 
64 
There's this graphic of space (s) versus time (t) of a particle.
How would I know if the trajectory is always...

T 11:50 AM
voko

3 
63 
A lot of textbooks and exam boards claim that light incident at exactly the critical angle is transmitted along the...

T 10:31 AM
Murtuza Tipu

2 
89 
Basically the symbols like force f and d/dt (mv) for these subjects.
Physics
Geometry
Calculus
Astronomy...

T 09:05 AM
ChrisVer

6 
163 
Quantity of heat (Q) is directly proportional to specific heat (C)?
I thought that they would be inversely...

T 07:22 AM
fabrc

2 
103 
Why volume charge density arises because of only a nonuniform polarization inside a dielectric?

T 06:57 AM
Maharshi Roy

0 
76 
I was wondering how speed, velocity, acceleration and anything with a \Delta t in the denominator are defined at...

Y 11:50 PM
ChrisVer

2 
127 
Hello,
I stumbled upon this question and I don't know how to answer it...
I know that Cv is defined as Cv =...

Y 10:16 PM
Andrew Mason

6 
130 
Do you guys know of any physics experiment that I can do in my house? Please reply soon thanks.

Y 06:00 PM
Simon = Mc2

2 
121 
How do I know which one of these two spheres have more specific heat capacity?

Y 04:17 PM
gsal

2 
156 
http://3.bp.blogspot.com/dP219mnzkM/VA7NfcUiroI/AAAAAAAAB9g/q_NJrbt4UfM/s1600/CIMG3315.JPG
300 km/s respect to...

Y 03:29 PM
HallsofIvy

1 
96 
I have a simple question let's say object hits the wall at angle and reflect. Will reaction force from that impact...

Y 02:56 PM
DaleSpam

4 
134 
Hi guys
something basic that I cant understand:
if I have a wind turbine , rotating due to some wind with no...

Y 03:02 AM
R.G

4 
174 
Hey, I'm doing a research on artificial satellites, and I'm really confused about the escape velocity required for an...

Y 12:04 AM
Murtuza Tipu

12 
325 
http://www.youtube.com/watch?v=ltnLOkaCBo
I have been using this skill for a few months now and I feel like it is...

Sep1214 08:59 PM
bothan

10 
404 
So I understand that a black body is a diffuse emitter, and that it radiates energy at a rate of σT^4.
I also...

Sep1214 07:44 PM
elegysix

1 
191 
Hi PF community! I'm currently doing a research paper on artificial satellites, and I've made a list of things that...

Sep1214 06:48 PM
Crutchlow13

6 
188 
During summer my swimming pool is 23° C and my loft air is 53° C. (73° F / 127° F)
The sun shines on the metal...

Sep1214 06:02 PM
Sten Larsen

24 
615 
Hi,
I invented a new type of arrow stabilizer. It is an aerodynamic turbine that makes the arrow to be stabilized...

Sep1214 11:34 AM
cjl

15 
295 
Case 1. You have a sphere with Radius R and middle point X with the charge Q. The charge is equally distributed over...

Sep1214 09:48 AM
vanhees71

1 
133 
I'm taking E & M II... Would anyone agree that the following statements are true?
An electric field changing in...

Sep1214 06:47 AM
Shyan

5 
181 
Okay guys, I still feel like I don't quite understand these concepts well enough. Do you guys have any websites or...

Sep1214 02:33 AM
Nugatory

1 
165 
Hi!
I try to get some intuitive understanding on the equipartition theorem stating that in thermal equilibrium,...

Sep1214 01:55 AM
center o bass

2 
179 
If fan blades move in a circular way how is the air moving towards you (in front of fan) ?
Also propeller and fan...

Sep1214 01:52 AM
A.T.

5 
187 
In the attached figure, a deenergizing RL circuit is drawn (left switch is opened while right switch is closed). In...

Sep1114 07:44 PM
gsal

1 
162 
Hello everyone.
I've been struggling with how to deal or solve questions that include variable masses. Considering...

Sep1114 04:59 PM
Nugatory

6 
199 
I'm wondering if someone is observing a situation from a frame moving in a uniform circular motion, would that frame...

Sep1114 09:09 AM
Nugatory

8 
348 
Hi,
The permanent gases like Nitrogen, Helium etc. have more specific heat capacity as liquid than their gases....

Sep1114 05:44 AM
AbhiNature

0 
137 
I'm looking for a "simple" calculator, most likely a matrix based thing, to allow me to work out the size of an image...

Sep1014 06:47 PM
Andy Resnick

1 
124 
I do not really understand the big picture of gauss law. For what I know a conductor is a material where electrons can...

Sep1014 05:38 PM
TrueColor

2 
235 
Trying to get my head around some ideas about "rechargeable" batteries and getting in a muddle!
So I get the idea...

Sep1014 02:50 PM
DeltaČ

4 
179 
There is a conducting circular loop with resistance R falling in the magnetic field ...

Sep1014 10:43 AM
Shyan

4 
301 
Imagine an electromagnet with two pole faces, one flat (N) and one pointed (S). If you put a diamagnet in between...

Sep914 09:33 PM
Meir Achuz

7 
241 
Is it possible to generate energy from the earth's rotation? Imagine a Foucault Pendulum attached to a dynamo shaft?
...

Sep914 06:23 PM
jbriggs444

46 
1,265 