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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
48,211 
Hi,
I would like to ask you If you could help me with a (I guess quite simple) problem I have to solve. To put it...

T 05:29 PM
A.T.

11 
208 
From what I have learned so far a wave propogates on a string by having the point on the string (that is closest to...

T 04:59 PM
Philip Wood

4 
130 
Hi,
I have a conceptual question regarding Lagrangian dynamics. It has to do with the potential energy...

T 04:34 PM
Orodruin

1 
39 
In the physics section there is doubt, that a mathematician would object to deriving something by dividing an equation...

T 02:57 PM
A.T.

72 
1,260 

 
 
 
The derivation of the maxwell boltzmann distribution involves maximizing the number of ways to obtain a particular...

T 01:22 PM
center o bass

2 
99 

 
 
 
Why can we say that a Carnot's machine efficiency does not depend on the fluid that you are heating? Is it because...

T 10:49 AM
Chacabucogod

10 
144 
If a metallic ball is place inside a giant hollow top, and the top starts to rotate. Along with the top, the metallic...

T 09:57 AM
Luca_Mantani

1 
78 
How do I know which one of these two spheres have more specific heat capacity?

T 08:41 AM
CWatters

4 
206 
This is what we have in textbooks and in Wikipedia:
ρ=ρb+ρf
and from there we get ∇.D=ρf.
But I am unable...

T 02:47 AM
deep838

0 
94 

 
 
 
I have a conceptual question that I am trying to clear up.
A reversible process means that the net change in...

Y 08:11 PM
Chestermiller

2 
129 
Is thermodynamics states like temperature, pressure and material properties like specific heat, thermal conductivity...

Y 05:48 PM
Chestermiller

2 
106 
I have a simple question let's say object hits the wall at angle and reflect. Will reaction force from that impact...

Y 03:14 PM
A.T.

6 
213 
Is there a mathematical relation for the temperature change when a fluid flows through a pipe from one end to another?...

Y 02:58 PM
Chestermiller

166 
10,969 
Suppose I have a vertical spring and an object.
If I slowly put the object on the spring until it reaches the new...

Y 02:06 PM
jbriggs444

7 
132 
Hi,
I invented a new type of arrow stabilizer. It is an aerodynamic turbine that makes the arrow to be stabilized...

Y 01:29 PM
duri

18 
371 
Hi guys
something basic that I cant understand:
if I have a wind turbine , rotating due to some wind with no...

Y 12:21 PM
duri

5 
220 
Having recently completed a session on the simple pendulum in physics, I was curious as to what the solution to...

Y 05:41 AM
voko

6 
192 
I attached an image of two expansion cases I am analyzing. Both cases involve an insulated cylinder that is divided by...

Y 12:44 AM
voko

35 
373 
I'm currently going over some mechanics notes and am confused about the following situation:
In the book I'm...

Sep1414 06:06 PM
voko

10 
159 
Hey all,
I just started a fluid mechanics class and I'm having trouble interpreting the physical meaning behind...

Sep1414 04:30 PM
SteamKing

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...

Sep1414 02:00 PM
mfb

1 
100 
There's this graphic of space (s) versus time (t) of a particle.
How would I know if the trajectory is always...

Sep1414 11:50 AM
voko

3 
91 
A lot of textbooks and exam boards claim that light incident at exactly the critical angle is transmitted along the...

Sep1414 10:31 AM
Murtuza Tipu

2 
128 
Basically the symbols like force f and d/dt (mv) for these subjects.
Physics
Geometry
Calculus
Astronomy...

Sep1414 09:05 AM
ChrisVer

6 
206 
Quantity of heat (Q) is directly proportional to specific heat (C)?
I thought that they would be inversely...

Sep1414 07:22 AM
fabrc

2 
133 
Why volume charge density arises because of only a nonuniform polarization inside a dielectric?

Sep1414 06:57 AM
Maharshi Roy

0 
106 
I was wondering how speed, velocity, acceleration and anything with a \Delta t in the denominator are defined at...

Sep1314 11:50 PM
ChrisVer

2 
159 
Hello,
I stumbled upon this question and I don't know how to answer it...
I know that Cv is defined as Cv =...

Sep1314 10:16 PM
Andrew Mason

6 
152 
Do you guys know of any physics experiment that I can do in my house? Please reply soon thanks.

Sep1314 06:00 PM
Simon = Mc2

2 
148 
http://3.bp.blogspot.com/dP219mnzkM/VA7NfcUiroI/AAAAAAAAB9g/q_NJrbt4UfM/s1600/CIMG3315.JPG
300 km/s respect to...

Sep1314 03:29 PM
HallsofIvy

1 
127 
Hey, I'm doing a research on artificial satellites, and I'm really confused about the escape velocity required for an...

Sep1314 12:04 AM
Murtuza Tipu

12 
343 
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 
428 
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 
207 
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 
204 
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 
649 
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 
150 
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 
201 