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PhysicsForums Base conversion -- the LOGIC and INTUITION behind it...  
04:46 11-Sep-07   [Replies: 2, Views: 57]    By: Unnamed
for example, converting from base 10 to 2, a systematic way is to divide the number by 2's successively and keep track of the remainder. the remainder coefficients represent the binary number. Now why...
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PhysicsForums stupid question re amperes  
04:27 11-Sep-07   [Replies: 1, Views: 46]    By: Unnamed
So, I find myself without the AC adapter for my laptop and I need power. My adapter is rated 19.5v 4.7a. I have an adapter from an older machine (same manufacturer), rated 19.5v 3a. The phy...
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MySpace Selling brand new vex Robot kit  
21:10 10-Sep-07   [Replies: 0, Views: 1]    By: Benjiman (V.C.C.)
brand new. everything included. Really good deal. Go to this ad on craigslist.com http://losangeles.craigslist.org/sfv/ele/419223215.html or http://ventura.craigslist.org/sys/419169166.html...
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PhysicsForums propeller hydrodynamics  
20:30 9-Sep-07   [Replies: 5, Views: 79]    By: Unnamed
hey guys, urgently need your help, im an industrial design student and at present we have a project that involves designing and constructing a peddel powered water craft. there will be a race upon...
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PhysicsForums Fourier series  
19:00 9-Sep-07   [Replies: 1, Views: 47]    By: Unnamed
We have a periodic signal of period 10 ms and amplitude 2.The signal is a rectangular pulse from -5/2 to 5/2 and 0 from 5/2 to 19/2.This signals fundamental frequency(f0) is 100Hz.It is passed through...
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PhysicsForums Mixers  
18:59 9-Sep-07   [Replies: 3, Views: 58]    By: Unnamed
Are there any decent dip package mixer ic's? It's very difficult to find them. A simple mixer ic to mix 2 signals is all I need. I have seen 20 pin and 32+ pins. Anything out there that is simpler for...
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PhysicsForums metal thermo flasks  
14:44 9-Sep-07   [Replies: 2, Views: 43]    By: Unnamed
A question about metal thermo flasks, or metal vacuum flasks if you prefer. I understand the principle of thermo/vacuum flasks. Just to proofed that I read up before posting this question :-) h...
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PhysicsForums about min sun of product  
12:07 9-Sep-07   [Replies: 0, Views: 28]    By: Unnamed
Is anyone know how to do this question Using algebraic manipulation to find the minimum sum of products expression for the function q.JPG [http://www.physicsforums.com/attachment.php?attachmen...
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PhysicsForums Mini Cathodically-Protected steel plate....  
07:42 9-Sep-07   [Replies: 1, Views: 64]    By: Unnamed
Hi guys/gals: I am doing a project on cathodic protection. If I have a steel and zinc plate, does bolting them together with nothing at the interface suffice as Cathodic Protection? It looks too si...
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MySpace Boycott Hollywood- STOP THE WAR IN IRAQ  
04:49 9-Sep-07   [Replies: 16, Views: N/A]    By: Radioactiveman
Would it work?...
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PhysicsForums High Voltage DC Bias IC?  
04:08 9-Sep-07   [Replies: 0, Views: 38]    By: Unnamed
Hello All, I'm now looking for yet another component for my experiments. I was doing some research into DC boost converters to figure out how to build my own (they seem pretty simple to make). I wa...
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MySpace Super-Geothermal  
01:38 9-Sep-07   [Replies: 0, Views: 1]    By: Radioactiveman
Geothermal energy may supplant fossil fuels, others By Hector Igbikiowubo 21 August 07 - "THERE are indications that geothermal energy may supplant that of fossil fuel in the near future, especially a...
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PhysicsForums Help with manipulating a digital signal  
23:22 8-Sep-07   [Replies: 3, Views: 76]    By: Unnamed
Hi everyone, software engineer here that needs help with a basic EE project for an automotive application. I have a digital hall sensor that goes high (+2v) once per engine revolution. This high si...
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PhysicsForums basic filtering circuit maybe?  
23:09 8-Sep-07   [Replies: 4, Views: 80]    By: Unnamed
i wanna build one of these http://funditor.110mb.com/LaserListener.html [http://funditor.110mb.com/LaserListener.html]> but he alludes to some kind of circuit at the end that could filter out th...
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MySpace Water swirl direction  
19:10 8-Sep-07   [Replies: 8, Views: N/A]    By: Zaphod
When in the northern hemisphere the water in the toilet bowl swirls counter-clockwise. When in the southern hemisphere the water in the toilet bowl swirls clockwise. Which direction does the water sw...
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PhysicsForums Frequency Domain Question  
16:25 8-Sep-07   [Replies: 0, Views: 31]    By: Unnamed
delete...
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PhysicsForums Need info about online course  
13:38 8-Sep-07   [Replies: 8, Views: 104]    By: Unnamed
Hi, I am taking FINITE ELEMENT METHOD and NUMERICAL METHOD in this semester of my college and I am looking for any ONLINE COURSE on them, if available, at reasonable price (or student price). If an...
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MySpace nukes  
13:37 8-Sep-07   [Replies: 7, Views: N/A]    By: Depth Perception
why do you think the milatary LET the people know that they "mistakenly" flew nuclear bombs over the u.s.,we never know what the milatary is doing..unless they want us to know..why do you think they w...
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PhysicsForums P and ID of used water system  
13:10 8-Sep-07   [Replies: 8, Views: 197]    By: Unnamed
Hello everyone, I'm working on water treatement in I need some P and ID (process and intrumentation diagram) of a water treatement plant. If someone have information about that please send me the link...
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PhysicsForums Performing an Engineering Analysis  
11:24 8-Sep-07   [Replies: 2, Views: 62]    By: Unnamed
I would like to learn how to perform a detailed engineering analysis on a product/machine but I am unsure on how to go about it. I know that an analysis involves doing a literature review by reading j...
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MySpace *Glacier moves 5km in 90 minutes!*  
09:11 8-Sep-07   [Replies: 2, Views: N/A]    By: Radioactiveman
http://www.guardian.co.uk/environment/2007/sep/08/climatechange ... The glacier is now moving at 15km a year into the sea although in surges it moves even faster. He measured one surge at 5km in 90 ...
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MySpace new solar breakthrough  
07:14 8-Sep-07   [Replies: 3, Views: N/A]    By: lagunatic
If you are interested check out these links. www.powur.com/mcshaw www.jointhesolution.com/mcshaw I think it sounds like the right direction....
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PhysicsForums AISI Classifications  
02:09 8-Sep-07   [Replies: 1, Views: 59]    By: Unnamed
Hello I am currently studying a class called Materials Science externally. One of the assignments I have to do is in regards to AISI Classifications but I can not seem to get my head around it. I w...
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PhysicsForums Bonding steel to nylon  
23:21 7-Sep-07   [Replies: 3, Views: 56]    By: Unnamed
Anyone know of any glues or epoxies that would be able to bond steel to nylon fairly well? It should be able to withstand about 30-50lb of force, and the steel fastener is only about 8oz, so I don't ...
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PhysicsForums Titanium and Titanium Alloys  
16:48 7-Sep-07   [Replies: 0, Views: 37]    By: Unnamed
Both titanium and aluminum alloys are used extensive in aircraft and aerospace systems. There is a thread on aluminum and its alloys, so I thought it would be worthwhile to have one on titanium and i...
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