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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,680 
Is force just acting energy?

Oct2309 05:46 PM
mikelepore

11 
1,851 
I am having problems with a simple problem with a mass (m) stationary on an inclined plane of angle θ.
I have...

Oct2309 05:14 PM
DaleSpam

1 
1,999 
When cars turn they lean away from the turn as the torque from the centripetal force is balanced by the larger normal...

Oct2309 12:38 PM
sophiecentaur

3 
3,998 
new to physics can some one plz help me with b and c
Load (kN) 0 20 30 50 60 ...

Oct2309 11:44 AM
lordajm

0 
1,079 
So, I was thinking a while ago about force fields. Don't stop reading though, hear me out.
It occurred to me that...

Oct2309 11:00 AM
Bob S

6 
8,154 
Is it possible to deduce that a blackhole must have something akin to Hawking radiation due to the 2nd Law of...

Oct2309 08:45 AM
Bacat

3 
828 
Hi I'm new here and I figured I would post a question that I have thought about but never really understood from...

Oct2209 02:52 PM
Borek

5 
2,068 
I'm trying to derive fokkerplanck equations using the Liouville operator for classical systems. part of it relies on...

Oct2209 02:40 PM
bubbloy

0 
1,105 
Hi
I'm trying to define a Newtonian lagrangian in an
rotating reference frame (with no potential)
Something to...

Oct2209 12:55 AM
mtak0114

4 
4,740 
Hello Forum,
given a input=delta located at time t=0, the system will respond generating a function h(t).
If the...

Oct2109 11:23 PM
kzhu

1 
1,393 
what is "conservation of angular momentum".

Oct2109 01:24 PM
Bob_for_short

1 
805 
Is it possible for a power plant to attain a PLF of about 109  110%? Gas, coal, nuclear any plant technology,...

Oct2109 01:14 PM
Bob S

5 
3,879 
I was reading the proof of how the work done on an ideal fluid which has been pressurized to a pressure 'P' is P.
...

Oct2109 11:32 AM
nucleus

20 
5,385 
Let's say we have a symmetrical weather wane that's free to rotate about its vertical axis, and a uniform fluid flows...

Oct2109 10:02 AM
AxelBoldt

24 
2,797 
Can someone explain to me what the difference between a potential and a voltage are. My understanding as of now is...

Oct2109 09:23 AM
dE_logics

32 
25,578 
Hi all, I just noticed that by shaking the water off my hands 3 times after using the toilet I can reduce the...

Oct2109 08:16 AM
dymitrruta

0 
877 
NOTE: I AM NOT POSTING A HW QUESTION.
It is the last problem, 4.29.
4.29 A "superball" of mass m bounces back...

Oct2109 07:30 AM
WiFO215

2 
2,984 
I was told today in a lecture that there is such a thing called an inertia force that occurs only when an object is...

Oct2109 04:38 AM
Doc Al

8 
961 
What are you able to derive or integrate from a voltage vs. time graph? Like if I have a battery and a resistor and...

Oct2109 03:15 AM
mikelepore

4 
9,964 
IF you throw metal or wood or whatever material ball into soft bed then it almost do not reflecting from bed as you...

Oct2109 01:37 AM
vissarion.eu

13 
1,312 
The airplane shown is in level ﬂight at an altitude of 0.50 km and a speed
of 150 km/h. At what distance d should it...

Oct2109 01:17 AM
patelkey

5 
1,488 
A 5.0 kg mass is suspended by a string from the ceiling of an elevator that
is moving upward with a speed which is...

Oct2109 12:19 AM
patelkey

2 
2,157 
Just wondering if the Betz limit is applicable to hydro turbines or if there is some analogous limit for hydro...

Oct2009 10:14 PM
rmm5

3 
2,801 
I'm wondering what happens (or if it makes sense) if in the formula \mathbf{F} = q (\mathbf{E} + \mathbf{v} \times...

Oct2009 09:06 PM
fluidistic

2 
767 
in circuits involving inductors can we use kirchoff law ?
i have seen this in many books but the electric field...

Oct2009 04:53 PM
willem2

3 
3,117 
N.B: I was trying to apply kirchoff’s voltage law to this ckt diagram. (created by myself :smile:)
...

Oct2009 04:35 PM
sphyics

4 
2,210 
Hi
I want some problems and solutions about thermodynamic.Can you help me?

Oct2009 12:40 PM
Mapes

2 
799 
I'm mainly looking for some practical guidance here. I'd like to build an electromagnet coil that's capable of...

Oct2009 11:08 AM
Bob S

2 
4,979 
Hello all,
I'm sure you all know the standard relation between torque and angular acceleration:
\tau = I\alpha
...

Oct2009 04:21 AM
D H

9 
1,145 
Can someone send me some interesting chain problems?

Oct2009 03:39 AM
debanik1

0 
593 
Does the magnetic field around a magnet increase when the distance away from the magnet increases? While using a...

Oct2009 02:07 AM
Gauss20000

3 
2,267 
Hi,
This must be a text book question but I couldn't find exact definitions(quantitative) of these measurements...

Oct1909 11:20 PM
Born2bwire

3 
5,825 
Is the Change in Rotational Kinetic Energy Frame Invariant?
...

Oct1909 10:29 PM
DaleSpam

6 
2,549 
Yesterday I finally, and sadly, put my Matilda 'Southwind' to bed for the winter.
I want to lift her off her...

Oct1909 10:13 PM
Bob S

3 
826 
Is it possible to have magnetic flux through an open surface ?
i mean if there is a circular arc and magnetic field...

Oct1909 02:19 PM
rplatter

1 
685 
I'm only midway to finish my introduction to electromagnetism (level around ResnickHalliday) so I understand the...

Oct1909 01:07 PM
Bob_for_short

5 
886 
I remember reading a thread here on PF about how paper towels can absorb water. I think the answer was that the towel...

Oct1909 08:41 AM
Andy Resnick

3 
785 
It is well known, that a point charge q\delta^3(\boldsymbol{x}\boldsymbol{x}') creates the same electric field...

Oct1909 08:24 AM
Bob_for_short

6 
568 
I have a sphere (mass m, radius r) whose centre of mass is r/2 distance away from its geometric centre. If it is kept...

Oct1909 01:14 AM
raghavgupta93

0 
2,565 
F=ma
How do we define m and F? If their definition both come from this equation, then the equation doesn't really...

Oct1909 12:29 AM
Martin

31 
10,377 