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Quality answers to common physics questions
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Jan16-12 Greg Bernhardt
The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
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Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
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So, I know this stuff is probably very elementary for most of the people on this site, but I have never had physics...
Jun1-13 07:56 PM
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Dear all, I have been spending 12 hours on this and cannot seem to come up with a solution. We derive Helmholtz...
Jun1-13 02:32 PM
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I realize that inertia is the tendency of an object to maintain its present state of motion. Now I am attempting to...
Jun1-13 12:58 PM
19 4,609
Has anyone ever heard of or know about any technology that could capture , store or transfer smell in any form...
Jun1-13 08:31 AM
4 896
Okay, so I've got a question on graphs and areas under curves. For example, a force-distance graph, with force on...
Jun1-13 06:45 AM
3 896
Hello, I'm having a bit of a hard time understanding the concept of calculating the emf of a cell (e1) By connecting...
Jun1-13 04:02 AM
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Since my high school days, I learned that glass is a liquid. (Science naive students thought glass is solid, and the...
Jun1-13 12:45 AM
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Hi, Generally if u see a post mortem skull after a rifle shot injury, exit wound is bigger than entry wound....
May31-13 11:23 PM
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I understand the acceleration of gravity and terminal velocity, but what if the forces that create terminal velocity...
May31-13 10:01 PM
2 601
Hi all, This is not homework or coursework. I am not sure whether this question would be classed as homework or...
May31-13 03:41 PM
3 651
What are the requirements for getting research jobs in Astronomy and Cosmology? Where did you go to school/what job...
May31-13 02:31 PM
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Hello, I have read several articles/websites which talk about modelling white dwarfs, In all of these papers...
May31-13 09:23 AM
5 791
From the wiki page on Hermann von Helmholtz: "an 1847 physics treatise on the conservation of energy was written in...
May31-13 01:30 AM
11 1,097
Taking highschool physics, i have learned that force and acceleration are vectors. But i have noticed prior to this,...
May30-13 10:35 PM
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I'm looking for papers or discussions concerning how gravity affects stationary subatomic particles(electrons,...
May30-13 10:18 PM
Simon Bridge
2 1,310
Hi. I am trying to understand some features related to the order of a phase transition. It is known that there are...
May30-13 09:19 PM
0 843
Hi, My control systems book uses a weird notation for the moment caused by friction in a rotating motor. The...
May30-13 06:42 PM
1 610
Gravity pulls things down.Things then gain kinetic energy.When you lift something it has gravitational potential...
May30-13 05:24 PM
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The problem is: A 10 kg sled is pulled at an angle of 35 o east of north by a force of 100 N and with a force of 150...
May30-13 04:49 PM
1 598
Would it be incorrect to assume the amount of heat gained (ΔQ) for a sample of water in a solar oven would be the same...
May30-13 10:11 AM
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Hi all, I recently read about a Fusor, on wikipedia and to my surprise there has been lots of research going on...
May30-13 09:07 AM
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I don't really know where this topic belongs. Let's say you're an ugly asymmetrical person, with your right hand...
May30-13 09:00 AM
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I wonder what is actually a light wave.Is the light particles moving straight and vibrating up and down or the medium...
May30-13 04:07 AM
7 874
Hey! I'am doing a X-ray spectrometer lab, need some help regarding the absorption of x-rays by matter. one simple...
May30-13 02:14 AM
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Suppose you have a system with different energy states and assume that it is in contact with a heat resevoir (i.e. you...
May29-13 06:27 PM
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Hey all, I starting to study QED along with a slew with other materials. (I read in the QED book and when I don't...
May29-13 05:03 PM
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Well, I've been searching for answers for probably the last hour now, and have found nothing but info on cigarettes......
May29-13 05:02 PM
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I've read that it's several times stronger than steel. I haven't read anything about its stabbing resistance against...
May29-13 04:49 PM
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So yes, the atmosphere exerts a force of 100,000 newtons per square meter. A person's head, is obviously much less...
May29-13 02:36 PM
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If one knew the equations for the 5 fundamental forces, would that not explain the entirety of all physical phenomenon...
May29-13 01:10 PM
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What are the conditions used,While calculating time period of a simple pendulum??
May29-13 12:20 PM
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I think i have looked at like 20-30 web pages, and i cant find a simple step-by-step explanation of the operational...
May29-13 12:10 PM
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If a magnet could somehow oscillate in and out of a coil of wire and used to power a light bulb, could that power the...
May29-13 12:17 AM
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I have two streams at controlled flow rates that will mix via an inline static mixer. Both streams will have check...
May28-13 09:27 PM
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I'm having a debate with a good friend and we haven't come to agreed yet. I'm very sure, yes, we will jump higher....
May28-13 08:04 PM
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gravitational force act in pairs, and they act toward the center of the earth. does it mean that if u find yourself at...
May28-13 06:40 PM
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I'll go right to the point. I'm trying to get someone interested in physics (and relieve physics of adjectives like...
May28-13 05:14 PM
3 721
What's the optical phenomenon called when a wheel is rotating clockwise so fast that it eventually looks like it's...
May28-13 11:42 AM
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hello all ! my teacher told me to do a research on examples of problems that has connection with green function on...
May28-13 09:07 AM
4 809
I am starting my 3rd year in September and I've decided to start thinking about research topics early. I'm quite...
May28-13 03:22 AM
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