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Quality answers to common physics questions
May25-09 10:31 AM ZapperZ 

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General Physics

- Nature and properties of matter and energy. For any physics topics not applicable to the categories below.
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The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
Apr8-14 10:13 AM
ZapperZ
166 160,194
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 63,623
Would a nuetrino laser cause any damage if aimed at a target and the nuetrinos had sufficiently high,...
Mar28-12 01:07 PM
Albertgauss
4 804
Hi, I use a numerical method to trace trajectories of particles. I want to program a sort of 'video' type graph. A...
Mar28-12 12:56 PM
Bob S
4 865
Hi all, I am trying to create a vehicle simulation and get the vehicle to accelerate realistically by calculating...
Mar28-12 12:26 PM
Bob S
14 3,290
Hi, My textbook states a decay constant of an isotope as 3.84 x 10 to the minus 12 - per second. Surely decay...
Mar28-12 11:56 AM
QuantumPion
20 6,881
Mod node: This thread was split from this other thread, 590162. Hey vkash. This is a good one.
Mar28-12 08:26 AM
D H
20 2,047
Hi, I know what geo stationary orbit is, my question is what does it mean when they say satellite is at "83.0E",...
Mar28-12 06:58 AM
xMonty
6 872
I searched different places but couldn't find how actually you calculate magnetic force between cylindrical permanent...
Mar28-12 05:38 AM
Joule162
0 724
I know an electromagnet can be created by wrapping a wire around a metal tube and putting some current across the...
Mar28-12 04:13 AM
sophiecentaur
1 1,750
Plasma, the fourth state of matter, is a gas that consists of ions and free electrons. If you cooled plasma would it...
Mar28-12 04:02 AM
ImaLooser
8 2,564
Given a set of wheels connected with a frame and chassis (a typical car), on a surface, how much friction is...
Mar27-12 09:34 PM
Sidelines
9 1,466
I am currently doing a senior physics experiment where we are stopping a computer fan (with steel glued on to the...
Mar27-12 08:17 PM
dazza95
4 1,099
Suppose we have two wheels connected along the same axis, spinning in opposite directions. (zero sum angular momentum)...
Mar27-12 07:52 PM
Pebble
19 4,868
If velocity v of waves produced in water depends on their wavelength λ,the density of water ρ, gravity g, then what...
Mar27-12 07:51 PM
Prakashik
0 1,247
Hi. I'm looking for a drawing tool which may help me draw simple figures with vectors and angles. I've tried many but...
Mar27-12 05:54 PM
4.66920160910
6 4,125
I need to find the Cartesian components of the field generated by a magnetic dipole, if someone wouldn't mind pointing...
Mar27-12 04:50 PM
threetimes
0 907
if KE=1/2mv^2 and you have a circular object rotating, with it's mass uniformly distributed through the object (ie...
Mar27-12 04:19 PM
sophiecentaur
6 5,307
Hi, I want to design a crude pendulum impact device which i can use to measure initial velocities of objects on a...
Mar27-12 01:58 PM
adamxrt
2 1,271
so i often hear the analogy of an atom being on the same scale as a foot ball in the center of a pitch, with the...
Mar27-12 01:35 PM
K^2
4 1,100
Imagine a wall (membrane). Concentration of a specimen A on one side of the wall is cA and it has the temperature TA....
Mar27-12 01:17 PM
lesy1
2 787
Hello! I am working on a project with a classmate. We have a bucket which represents the water supply and an...
Mar27-12 12:29 PM
jim hardy
3 1,741
Since we have such a strong magnetic field around the earth, why does it not interfere with smaller magnetic fields we...
Mar27-12 11:19 AM
M Quack
4 1,075
Not sure if this is the right place to post this question but still:- I always asked "why" questions in physics but...
Mar27-12 10:50 AM
Bob S
12 1,305
I used this instrument to measure the length of a slit. It was similar to vernier calliper but it looks like a...
Mar27-12 07:50 AM
jmher0403
4 636
If i have 2 circular objects like coins and their moving on a frictionless surface and i know their velocity angles...
Mar27-12 06:31 AM
Jordiston
0 774
Hi all, I am doing a maglev conveyor for my final year project. I need to run a simulation program to do some...
Mar27-12 04:52 AM
Lantis
3 797
I pretty much know nothing about making and reading Physic formulas? Could someone help me?
Mar27-12 04:11 AM
ErolDynamics
2 2,059
I'm a year 12 physics student and I have a keen interest in the inner workings of a magnet. I know that magnetic...
Mar27-12 03:03 AM
M Quack
2 2,345
Why is it impossible to sit in a chair and lift it up? People can lift hugh amounts of weight so why can't they lift...
Mar27-12 12:44 AM
uperkurk
19 2,647
Hi, sorry if this is a bad question - I'm not very good at physics. We polarize sunglasses vertically because of...
Mar26-12 10:41 PM
indieindie85
3 1,176
If i am given a graph of B(magnetic field) vs Time,how can i find the induce emf from this graph?? I know that the...
Mar26-12 10:28 PM
K^2
1 798
I am studying AP Physics, and confused about the application of Ampere's Law. When we calculate the magnetic field due...
Mar26-12 09:26 PM
K^2
11 1,448
In class, our instructor talked about a pecularity of black holes. When virtual particles come into existance for an...
Mar26-12 07:38 PM
K^2
1 968
Hi, I am studying thermal radiation. Does anyone know what is a connection between emissivity and albedo. Regards,...
Mar26-12 06:41 PM
K^2
4 2,240
Hello, Say you have a box with two (interacting) particles in them. If you had to venture a guess, what would be...
Mar26-12 06:21 PM
K^2
4 918
Physics is not my forte, but I need some answers re EMFs. I want to buy a 30-ft sailboat that has an electric engine....
Mar26-12 05:37 PM
jim hardy
2 883
I had always thought that a capacitor with a dielectric transmits AC precisely because it polarizes in response to the...
Mar26-12 05:35 PM
sophiecentaur
8 1,081
Hi there, I have a very basic question about string tension. Say I have a mass at the end of some string whirled...
Mar26-12 05:26 PM
sophiecentaur
2 1,025
Hi there, My textbook says "When a beam of high energy electrons is directed at a thin solid sample of an element,...
Mar26-12 04:51 PM
sophiecentaur
8 1,358
Every year we do an experiment to find the resistivity of Nichrome wire, and every year the result is the same: 5 x...
Mar26-12 02:49 PM
ABarrows
3 2,133
Would Solar panels work if i were to shine strontium alluminate....if yes why and if not, why not?
Mar26-12 07:15 AM
vasavrules
0 737

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