Device Definition and 509 Threads

I am sure it is not right, it seems able to go backwards far more than the other, and has less control, it has little pain until it goes backwards, the only outward sign of malfunction is that it is quite hot ? is this a doctor thing or wait and see thing?

Hello everyone. I was just wondering is anyone knew an example of a physical device with a)both inductance and resistance b)capacitance, resistance, and inductance. I looked these up on wikipedia and I got that an example for b) would be a radio tuner, is that right? Plus, I can't get a)...Any help?

I am in high school, taking a college Physics for Scientists and Engineers class. I am stuck on one problem concerning an atwood device. I have an atwood device with two masses (m1<m2, m2 higher than m1, connected via a massless string) and a pulley with a mass Mp and radius Rp. The pulley...

A Venturi device has a diameter of 4mm at one end and a diameter of 2cm at the other. Air enters at 1200cm^3/m. Mercury is in the botom of the device. Assuming mercury's density to be 13700kg/m^3, and air's density to be 1.2kg/m^3, find how high the mercury rises. Assume air to be an ideal...

From wikipedia: A filament lamp obeys ohms law within certain limits of voltage and current so does that mean it is an ohmic device? Also from wikipedia: Sounds reasonable as well. Im inclined to believe the second quote since there are only a few values that the filament lamp will...

I wasn't sure where to post my question but it seems like it would belong here. I was hoping for an anti-physics category or something hehe. I apologize in advance if I was wrong. Anyway, I've been reading about perpetual motion machines and I understand the physics behind them and why they are...

I have a limited understanding of how nuclear devices work and understand the basic physics related to fusion and fission. However whilst I do not believe the latest assertions by Bashir the cleric from Indonesia who reckons the CIA set off a micro nuclear device in Bali - rather than it...

I work for the Coast Guard reserves as an ET. My primary duties include performing the monthly Preventative Maintenance onboard the ships at the nearby station. Of the monthly checks I must do, one is perform the SINAD for the radios. We have a SinAdder 3 which works fine in the shop. However...

Currently I am using a pc to drive a stepper motor through a xylotex-brand motor controller. The problem is the PC's time clock just doesn't allow for steady movement. What I need is a specific controller to handle the signal to the motor. All I want the PC to do is send a command to the...

I always think of little things I want to build or do. I originally studied EE when i first got into college, but switched to IS. I have a base understanding and can solder. I'm basically looking to build a device that hooks inline with a sensor on my motorcycle. The plug has 3 wires (power...

I was wondering if anyone could point me towards a source about making constant head devices. I was wanting to measure and then relate, experimentally, the velocity of a stream to its cross-sectional area. Since this will be done mostly at home using pedestrian tools, I need to find out how I...

Hi everyone, Im designing a new device for openeing bottle caps. But I am stuck, :cry: basically I have a second class lever (pivot at one end, effort at the other and weight in the middle). The weight is 72.21N the overall length from the effort to the fulcrum is 64mm and the length from the...

would this work? first of all, i need to know if my reasons for glass being transparent are correct. glass is a crystal, therefore, when the outermost atoms are hit by lthe first photons, the energy, by way of phonons is transferred to the inner atoms as well. when the second photons come...

Hello everyone, Anyone know a good book for programming a windows mobile device?? I'd appreciate it.

I am to use a pyranometer, a device that measures sunlight intensity. I am confused about the output unit it produces. It says on it's side 4.55 \cdot V/\left( {W \cdot m^{ - 2} } \right) but I'm not sure how to interpret this unit. All help will be appreciated...

allright so I'm constructing a rube goldberg device as a side physics independent project and it has to go through ten steps to achieve the final outcome of lighting a bulb. i need some ideas for steps I'm drawin a blank. it has to go through 5 different energy changes like potential, kinetic...

Hey guys, what is the name of the device that display sound waves as transverse waves on a screen? Thanks

is it true that electoronical device are still alive even when they are off? if yes why?

Question An automatic external defibrillator (AED) delivers 125J of energy at a voltage of 1050V. What is the capacitance of this device? Possible Ans Capacitance is charge / voltage. We have the voltage so how can you get a value for charge?

I'm looking forward to doing some photography projects indoors, but I'm having a hard time differing between sources of light around me. I suspect that the lighting system in my basement is not as bright as I suspect it to be. Thus, I came to the conclusion that the upstairs room was a lot...

I have Main board Intel D865GVHZ HDD40GBWestern digital RAM256MB Processor intel 1.7ghz running WINXPsp2. When swiching on the system after POST before loading windows I got error massage " Reeboot and select proper boot device or insert boot media in selected boot device " When I restart...

First of all I would like to apologize if I am posting in the wrong forum. I couldn't really decide if this belonged in the general physics, homework, or engineering forums since it involves principles of physics, is technically an assignment, and also has to do with engineering. Anyways...

http://prorev.com/511poptart.gif http://www.pmichaud.com/toast/

Hey, I need to design an egg crash landing device in order to protect an egg that is being dropped from various heights. The catch is I am only allowed to use 1 metre of masking tape and 10 sheets of computer paper. If anybody has done this experiment before or have any suggestions, I...

Well i have been assigned a project in my physics class that is totally clueless to me so i have come to all you smart peoples to help me with it because I am like totally clueless of what to do... I am to create a rolling device powered by (a) rubber band(s) (no engines, etc)...

Could those chips which they can put in the brains of quadripletics (sorry, spelling mistake probably) which allow them to move objects by having an electronic device read their thoughts be used in other people (At a cost) for example those who wish to improve their relationships with others or...

The control program for a device-driver process is an infinite loop. Roughly, the loop body is: wait for I/O request from user process; send I/O command to device; wait for command completion; notify (unblock) user process. a) [10 marks] Suppose the device driver waits by polling the...

Hi I need you help I must connect this function Z= X3'X2'X1 X0+X3'X2 X1'X0+X3'X2 X1 X0 in a Multiplexer the 74LS151 without using any other TTL device. I was thinking of putting in the 3 bit entry X3 , X2 , X1 so how do i put X0 and where ? How do I connect I's to form that function, I...

I wonder if it's possible to create the laser listening device as a project . i 've been fascinated by the idea ever since i saw it on SPIES It'd be a great help if anyone could could tell me how to get started first ,like how does the thing actually work n how to create a laser n stuff .

Please don't beat me up too badly. I ask this in all sincerity. A very small device adds energy to a system primarily via radiation. Temperature differential is high—at least 1,500°F. The system itself is rather massive—tons. Intermediate heat transfer is via forced convection of a...

How does sound travel from the musical device to the heaphones through the wire? I'm trying to understand the process the music/sound goes through along the wire to the headphones. Thanks!

hi all does anyone knows how a spring locking mechanism in a micrometer torque wrench works? thanks regards ss

What is the name of the device used to measure ohms? :confused:

I need to design and create some sort of device to measure an interval of time between 10 and 40 seconds. I can't use any electrical or mechanical things. I had ideas of puting water in a funnel and letting it fill up a cup in which I've measured how much water equals a second for example. I...

Hi. My PC says he couldn't found SATA device. But I don't know the importance of it. Can you give me some information about it? And I also wonder that, can it be a fatal error? Thanks..

http://www.indiadaily.com/editorial/12-04e-04.asp Anyone have more info about this and what's going on?

i was wondering if using the principle of lightning and how it works, could be harnessed to make a anti-gravitational device using strong electromagnets and a enormous amount of power. but in theory could it work?

Perhaps you’ve heard of Troy Hurtubise. He’s the guy who built all those bear proof suits a while back in the hopes that he could one day survive a grizzly bear attack. He was also featured on the Canadian Discovery Channel a couple of times since then for his invention of a cheap and effect...

Also known as the "Levitron" Have you seen this Amazing Anti-Gravity top with the catch phrase "A challenge to master, A miracle to behold" I would have written it "A miracle to master, a challenge to behold" According to the pictures on the box I was expecting this top to hover in mid air...

Hello. Take a look to this page: www.geocities.com/nayado/ You all know that in a normal induction process, a back-emf is generated that tends to oppose current flow. All our motors, generators and devices work like this: You introduce a flow or movement, and the device operation will...

Egg Drop Device! I have to create an Egg Dropping Device for my Physics class using these materials: 10 straws 8 x 8 cardboard piece cellotapes (to attach the joints and nothing else!) The egg must survive a fall of about... 10 ~ 15 feet I assume... Please feel free to post...

I've just got my final year project assigned. It has to do with a numerical simulation of a Ram Accelerator device. Well, apart of having doubts, which I will post just here proximately, I would want to know some website to learn more about that type of device. Apart of Google sites...

Well, it's more or less for robot constructon thing. Does anyone know if it's possible to construct a small EMP device that'll only have a couple meters worth of area effect? If there is, any hint on how to do it, or how much it would cost? Everything that I've found so far includes some type of...

I am doing a project called "gravitational waves in the rubber universe" and am looking for a little help. The idea is to make a cone shape from latex and roll a ball-bearing around it (a bit like those donation boxes where you put in a coin and it rolls around in circles until it falls in the...

In science we had to build a device which, when dropped 3 stories onto cement, should not allow an egg inside inside of it to crack. One of the follow up questions says : Why should your device accelerate slightly slower than the gravitational acceleration of 9.8 m/s/s " - I can't understand why...

http://www.alexchiu.com/affiliates/clickthru.cgi?id=mikolaj Did you see and what do you think about that ? Can it be true?

I'm interested in doing a science project involving pelter junctions, not involving circut board kinds of things. http://www.popsci.com/popsci/auto/article/0,12543,683524,00.html Something like that would be good, with variables

I make a perpetual motion device. It is a kind of overbalanced wheel. :wink: It is very simple mechanism. I am trying to make its prototype (or toy model). It is on paper now. :confused: I am trying this month only. After that I will cut my drawing in ten (10) parts.I ll release all drawings...

This thought was inspired by reading the other thread "perpetuum mobile" where ZapperZ posted an interesting (but of course flawed) perpetual motion device. It was fun to analyze and to figure out why it didn't work and I was wondering if anybody else had neat ideas that seem to very...

Found an interesting link about a supposed kind of mind control device called the LIDA machine, anybody know if this is for real or if there is anymore information about it. see: http://raven1.net/lida.htm EDIT: I seem to remember richard dawkins being subjected to some sort of (electric...