Instrument Definition and 93 Threads

Here's my problem: I have been using a digimatic indicator tool to measure the thickness of a somewhat uneven film. The digimatic indicator has a digital screen that shows up to 1 um, but according to specifications the accuracy is only 3 um. To account for the uneveness I have taken 10...

is there a instrument used to detect under ground water using capacitance principle

Hi: i have a project to design ECG system: read ECG signal by using (DAQ)data aquestion and the Signal processing(bandpass& notch filter) will be done by using MATLAB program. I was Intended to use instrument amplifier to obtain I,II or III signals as this figure: but my supervisor...

I am working on a forced vib project involving a musical instruments I am trying to have the vibration of my classical acoustic guitar increase, however NO ELECTRICITY CAN BE INVOLVED, and also trying to make the vibration of a piece of tightly folded aluminum that is attached to my guitar to...

Homework Statement You are designing a two-string instrument with metal string 35.0 long, as shown in the figure . Both strings are under the same tension. String has a mass of 8.45 and produces the note middle C (frequency 262 ) in its fundamental mode. To extend the range of your...

I used this instrument to measure the length of a slit. It was similar to vernier calliper but it looks like a microscope and had movable small magnifying glass to determine the line that perfectly matches up with the measured value. It measured to hundreth of a millimeter... does anyone know...

This question may be in the wrong section and quite irrelevant for many of you. Anyway, I need to buy a new calculator for my linear algebra course to deal with matrices and that stuff... which would you recommed I buy between the TI INSPIRE CX - CAS and the TI 89 TITANIUM? These are the ones my...

To understand length contraction better, would an precise instrument where width, height and length must be exact equal for working when standing still in frame A, still working in its rest frame B at a higher speed in frame A with length contraction ? With other words, is length contraction...

Hi everyone; I read some of FTIR threads in forums and they were at the different parts of forums so I decided that it's the best place for this question. But if I am wrong please move the thread. I'm new for FTIR measurements. First of all I want to say that I'm doing this kind of...

Dear Experts, I am currently in last year in university. My major is Electrical Engineering concentration in control. In my campus, I am given a lot of theory about EE rather than practical things (making instrument or robot). And now I get my internship in manufacturing company that gives...

I intend to purchase an Alternating Pressure mattress from US which runs on 120 V, 60 Hz & 1 Amp.The problem is I would be using this in a country which has a 220 V ,50 Hz supply. I understand that if I use a converter it's only going to convert the voltage from 220 V to 120 Volts but will...

I am trying to build the instrument according to this link http://www.inventgeek.com/2009-Projects/Laser-Instrument/page5.aspx I am having problems with lasers.I can not focus the laser dot on the photoresistor.So I thought about laser array(fabricated)but i could not find it.So I am now...

Grade 11 musical instrument project need help! Homework Statement I am making chime bars for my project. My partner and I were working on it today and we cut our first chime bar and used visual analyzer to figure out the frequency of sound produced by hitting our first chime bar. We found...

We are working on an outdoor display unit. It will operate at a wide range of temps. There is not a requirement to purge air from the encasement but would be a smart decision I think. my thought was to use a gas that is very dry and heavy enough to simply purge the air and sit in the device...

Need some help guys https://www.physicsforums.com/attachment.php?attachmentid=32237&d=1297816285 I began to analyze it and I got to this: OA2 is a non inverting amplifer OA1 is a voltage follower thus: V1(1+ (R1/R2) is the input for R3 into the final op-amp OA3 which is an...

Hii... I have a powder that consists of Si, SiO2, Fe3O4, FeO and Fe. I really want to measure the conversion of Si to SiO2. Anybody know what kind of instrument or method that can be used to measure the composition?

Homework Statement I have a project in my mind. Removing the neck of the electric guitar , Removing thin steel guitar strings from my electric guitar and replacing them with 1/5 inch thick brass tubes. And than play like a guitar and amplifying with a sensor. There will be no fret contacts. Is...

So i know instruments need A TON OF PRACTICE but the problem with me is that i get bored too fast to play instruments. I've been practicing on my guitar now for 3 months but man i can only play it for 30 minutes tops and then i get seriously bored and start going on the computer. I can't help it...

Let's stick to SR here. Given an accelerometer, one can determine locally if one is moving inertially or not? Can one determine locally if a particular instrument is an accelerometer? If one has no accelerometer, then inertial movement has to be determined by absence of forces on the...

Hello everyone. I am currently a grade 11 High-School student and have embarked on making the Waterphone() for my musical instrument project. Fortunately, I have stumbled upon this how-to for something to start on http://www.em411.com/show/blog/7895/0/DIY_Waterphone.html . I will make it look...

This instrument starts at about 0:13 Marie Osmond singing "Paper Roses" https://www.youtube.com/watch?v=-3fqJkTeDNU I hear it a lot in country music and it drives me nuts. Of all the sounds in the world, this is the one that makes me want to pull my head off. My mom said it's a steel...

Mine is the flute https://www.youtube.com/watch?v=1ZeuverPXEU&feature=PlayList&p=D80A64739A6BB0B8&playnext=1&playnext_from=PL&index=31 https://www.youtube.com/watch?v=RnCW91A66qs&feature=PlayList&p=D80A64739A6BB0B8&index=33&playnext=2&playnext_from=PL...

I've been trying to figure out what instrument this is. I was think maybe electric violin but I don't think that's what it is. Unfortunately there is no video on youtube with this song so I have a link to another website...

Homework Statement A 5.10 kg instrument is hanging by a vertical wire inside a spaceship that is blasting off at the surface of the earth. This ship starts from rest and reaches an altitude of 290 m in 10.0 s with constant acceleration. a.) Draw a free-body diagram for the instrument...

i have a major problem. i have to find the name of this instrument until wednesday. can anybody help me please?

An object is placed two focal lengths from a diverging lens, (a) What kind of image forms? (b) What is the magnification? (c) Where is the image? I am pretty sure the image is virtual, as for (b) and (c) I have no idea what to do.. Looking for some help, thanks in advance.. (a) I am...

is it possible to detect the presence of enantiomeric exess of one enantiomer over the other using 1H nmr in a 400 mhz instrument without the use of any chiral agent?

It's a spectrograph but not used for chemical analysis in the lab, the receptor is loose and can be used for analyzing the spectral output of a source. It's not a photometer, that's either the receiver alone or tends to work at only one frequency. I've seen them labeled as spectrographs...

Okay. I'm no electrician, but that's why I'm posting. I've been working on modding an electronic keyboard for some friends. Its a really simple little thing, basically a stylophone in a keyboard case, runs off of 4x AA batteries. Like a child's toy keyboard, really. Ive cracked it open for...

(1) My requirement for this project was to build an instrument that can produce all the notes in a C scale. The accuracy of the notes is to be judged through Frequency (Hertz). I decided to build an instrument whose design is comprised of eight electrical conduit tubes (metal) that are about...

What is your favourite musical instrument?

Does anybody here play an instrument? What kind is it (brand)? Or is anybody in any sort of arrangement or band? Personally I play acoustic guitar and electric bass...boy I love playing bass. I play bass all the time I can't get enough..although recently I hurt my hand in a football game so I...

How would one calibrate an instrument in deep space, the instrument must be set to a zero point and the instrument could be effected by any force.

If an electromechanical instrument's (say a galvanometer) accuracy is given as a percentage of its full scale deflection, what would its accuracy be at anything lower than full scale deflection? My thoughts: If say full scale deflection is 100V The error is +-1% which is +-1V, Does that...

Homework Statement a stringed musical intstrument from a remote tribe in Africa sets up a standing wave along the .75 m length of the string. This length corresponds to the distance between the first node and the seocnd node. The string has a mass of 11.5 grams. The strings vibrates 300 times...

hi in class we're doing a project where we have to explain the physics behind an instrument that we either build or already have. i am going to be bringing in a balinese instrument called an angklung, which is an instrument similar to chimes except it is made out of bamboo. i was wondering...

Okay, we need to build an instrument that we can play a song with. The audience needs to recognize the song in order for us to get full points. You can't use any instrument parts and the instrument must be constructed from scratch. I was thinking about making a tubed instrument like this...

I want to design an experiment with multiple instruments places all over the Earth in such a way that at any time, at least one of the instruments can observe the sun. What is the maximum separation of instruments permitted? I am really confused. Please help me with this!

Ok I suspect it may be pointless to post here considering the bad rap that BASIC gets. I have a fair amount of BASIC experience in instrument control. I started out with Commodore BASIC and moved up through QBASIC and Quick BASIC (yes there is a difference) and through Visual BASIC 6.0. BASIC...

A hollow brass tube (diameter = 3.23 cm) is sealed at one end and loaded with lead shot to give a total mass of 0.219 kg. When the tube is floated in pure water, what is the depth, z, of its bottom end? through manipulation of some laws i have broken it down to this stage: z = m/(πr2ρ)...

Hey everyone, i have to apply physics knpowledge to make a musical instrument, and if anyone has ever done this before i need major help with this assignment and i need to do good on it so please post your email reply to this thread or add me on msn: donjuan_fella@hotmail.com

http://news.bbc.co.uk/2/hi/science/nature/3545130.stm

Just attempting to learn a little more about my fellow PF members. So, who plays an instrument? What instrument do you play? How long have you been playing? What is your favorite piece on that instrument (and can you play that piece, or do you just wish you could)? BTW, I play the piano...