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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,884 
I'm wrestling with the question of dragon flight and whether it would be possible/feasible.
I've read the book "the...

Jul2208 10:38 PM
huggy bear

7 
3,157 
I wish to understand evaporative cooling. Apparently the principle consists in pumping the vapour above a bath, hence...

Jul2208 07:06 PM
Angelos K

4 
2,779 
Hello,
I have a little project I'm playing with that involves calculating a series of forces and summing them to...

Jul2208 10:30 AM
graffy76

2 
4,254 
It's been a while since I've been in the classroom and I'm having trouble figuring this one out. I'm trying to create...

Jul2208 10:04 AM
mgb_phys

1 
3,376 
So... am I understanding this right? Does Lenz's law suggest that the velocity of a magnet dropping (gravity) into a...

Jul2108 11:18 PM
vanesch

1 
1,090 
Here's a silly question I ended up thinking about. Maybe I learned it in college, but it's long forgotten by now ^~^;...

Jul2108 09:32 PM
tuoni

4 
1,207 
Hi
What do the 4 equations say in words?
not in math but in words that explains the meaning of them.
thanks

Jul2108 08:50 PM
Gear300

5 
2,106 
... with all this drilling equipment and an idea, albeit a dumb one.
Big tube, through the moon. Big permanent mag...

Jul2108 04:39 PM
russ_watters

13 
1,829 
How does dissvoled gas bubbles move in solution?
I want to do a computer simulation on nucleation so i am trying to...

Jul2108 11:03 AM
Vanadium 50

1 
1,097 
What is charge?

Jul2008 05:31 AM
CompuChip

1 
907 
First, to preface this, I have never taken any formal engineering courses, and I don't remember the physics class I...

Jul2008 12:05 AM
rcgldr

4 
4,013 
Can someone explain me how to extend Hamilton's principle to nonholonomic system's thru the lagrange undetermined...

Jul1908 02:10 PM
gdp

1 
2,578 
Where can I find online a good set of rigid body dynamics exercises? Thanks.

Jul1908 06:05 AM
Bert

2 
1,267 
Hi, folks.
I am looking for some help to understand the physics of a water pendulum (in fact, I don’t even know if...

Jul1808 09:39 PM
luke

1 
2,397 
I am trying to calculate the Efield from a varying Bfield. The Bfield is from a current loop.
...

Jul1808 09:03 PM
luke

4 
3,753 
Has anyone heard of anyone trying to conduct the double slit experiment with a barrier between the two slits that goes...

Jul1808 06:41 PM
pallidin

3 
1,170 
Can anyone please tell me whether the temperature measured from Wien's Displacement law/Planck's Radiation...

Jul1808 02:55 PM
Andy Resnick

10 
1,884 
I don't know if you guys have heard that, when a railroad car is about to start moving, railroad operators sometimes...

Jul1808 11:54 AM
berkeman

4 
3,755 
hi, I'm a web developer so i usually stay in front of a computer for almost 12 hrs a day.
my question is, when i...

Jul1708 10:06 PM
DaveC426913

1 
1,145 
I'm trying to figure out what the stress level of a wakeboard is when it hits the water upon landing. I'd like to be...

Jul1708 04:46 PM
ugly

0 
2,834 
Could someone show me the simple formula, showing how quickly
an item sinks in water.
Presumably the formula...

Jul1708 11:59 AM
bemortu

4 
3,159 
I have a conceptual question regarding the selfinduced emf in a solenoid coil. I have attached a graphic from...

Jul1608 09:44 PM
Defennder

6 
1,965 
Hi,
I am going through a book on thermal physics (specifically on a section on the 2nd Law)
It talks about...

Jul1608 08:45 PM
juanedilio

2 
2,154 
Dear all
I am a secondary and sixth form teacher in London and I have come across a
puzzling situation involving a...

Jul1608 04:18 AM
mklein

2 
1,145 
Here is the situation. A large electric motor has a long rod attached at a 90º to the motor shaft and is accelerated...

Jul1608 12:46 AM
russ_watters

3 
1,344 
If say a cylindrical piece of material with a high yield strength is compressed in a vice with a force approaching the...

Jul1508 10:17 PM
stewartcs

2 
1,407 
I was playing around with some manipulations of maxwell's equations and seeing if I could work out the wave equation...

Jul1508 05:00 PM
Andy Resnick

3 
964 
Hi. I'll start off by saying I have a background in mathematics, but not in physics. If I use the wrong term, I...

Jul1508 02:17 PM
rcgldr

5 
1,182 
Hey everyone. First post here. Sorry if this is the wrong place. Force calculation seems to fall under classic...

Jul1408 11:33 PM
lukahn12

2 
1,159 
Are there any other math/physics/engineering runners out there who are interested in collaborating on an effort to...

Jul1408 06:19 PM
juliasantanna

1 
4,722 
Hello! I'm very new to these forums so please pardon my ignorance.
When you twirl a mass on a string horizontally...

Jul1408 05:56 PM
Doc Al

6 
2,455 
Why do we apply law of conservation of linear momentum on a body that explodes in air when an external force,...

Jul1408 08:35 AM
pardesi

8 
2,479 
Hi all,
Some time ago I watched this video about an intraterrestrial elevator. It is about a theoretical elevator...

Jul1408 06:06 AM
Gear300

4 
1,397 
Hmm how does one prove that a lagrangian is a function of just the generalized coordinates and the generalized speed...

Jul1408 03:19 AM
pardesi

2 
1,164 
BACKGROUND:
I am doing an experiment determining the young's modulus of a cantilever through principles of SHM (i.e....

Jul1308 07:05 AM
tinytim

4 
4,185 
1975 the roof of the Montreal Velódromo which weighed 3.7x107N was raised 10cm to be centralized. What the work...

Jul1208 10:10 PM
kateman

1 
1,430 
There is a EM radiation of frequency suppose x Hz.Let it has to travel a distance of y m.Now what's the time required...

Jul1208 06:10 PM
Andy Resnick

3 
1,340 
Hi.
I'm having some problem solving this problem: Consider a 3 body elastic collision; 3 bodies on 1 axe; both have...

Jul1208 06:16 AM
BobMonahon

1 
3,311 
Can anyone give a simple explanation to generalised cordinates in Lagarangian/hamiltonian mechanics

Jul1108 03:02 PM
Oberst Villa

2 
1,227 
For an ideal gas PV=nRT where n is the number of moles show that the heat transferred can be written as:
dQ =...

Jul1108 10:43 AM
Andrew Mason

1 
1,438 