Experimental Definition and 494 Threads

Homework Statement Hi, I need to calculate the Ksp of Ag2CrO4 based on experimental data. During the experiment, 1.25g of pure copper was placed in a 1.00 L solution of silver chromate. When the copper was extracted, only 1.24g remained. Balanced chemical equation: Cu + Ag2CrO4 -->...

Does the experiment confirming Bose Einstein condensation prove that identical particles are indistinguishable? How does that reconcile conceptually with Maxwell distribution to which Bose Einstein distribution converts? Is this a result of the strength of interaction among the identical...

This isn't an actual calculation homework problem I'm having but rather a lab discussion. I'm trying to find experimental errors of the experiment where you determine an equilibrium constant using spectrophotometry. The reaction is: Fe 3+ + SCN - = FeSCN 2+ we used Fe(NO3)3 - iron (3)...

So this has been on my mind: When an experiment is performed and results gathered/calculated etc and checked against theoretical predictions: * when you take into account random errors and * when you take into account systematic errors, and the result is within the one predicted, are you...

The question is shown below the --- or this question and answerbook is from U Physics 12E #7.71. I uploaded a JPG that can be seen at http://i43.tinypic.com/35j9jja.jpg I don't understand this problem. I see that to solve this Conservation of Energy and N2L are merged using x, and that h from...

Im a junior getting a BS in physics, and I am in the "what do I want to do with my life" phase of my college undergrad career. currently I am stuck between deciding between continuing physics, getting a PhD and focusing on experimental physics, or getting my BS and post bacc plus masters in...

I'm a senior undergrad and will be applying to grad school soon. The field I'm interested in is experimental high-energy physics. There are already about six schools I'm looking at applying to, but I'm wondering if anyone has any advice about possible safety schools. My overall GPA is about...

Photoelectric effect -- experimental Homework Statement Suppose you are doing an experiment to determine the work function of a metal.* You get k.e.$_1$, $\nu_1$ and k.e.$_2, \nu_2$. * We know that k.e.= $h\nu - W$ but when you solve the simultaneous equations, we have a $h$ slightly...

Hi everybody. Can you talk some about dealy life of an experimental high energy physicist who work in CERN, FERMILAB e.t.c as full time worker. What does he or she do? I think only a few people do real things. A few people prepare experiments to research and decide which variables will be used...

Homework Statement I have experimentally determined the work function from the intercepts of a fit line in graph of stopping potential (J) versus frequency (Hz). This is from a photoelectric effect lab. The value of the intercept, which I believe is that of the work function, is returned as...

Canal rays experimental set up -- a doubt in this Homework Statement Please go through my attachment. It has been mentioned that luminous stream of particles were observed behind the cathode. Homework Equations Behind the cathode means , Whether right of the cathode or left of the...

Homework Statement Suggest a reason why theoretical and experimental results for resistors R1 and R2 are different for: experimental R1 and R2 in series vs R1+R2 and Experimental R1 and R2 in parallel vs 1/R1+1/R2 R1=23.080 Ohms R2=41.289 Ohms Series Experimental=58.769 Ohms Series...

Like many, I'm applying to graduate schools in physics this fall. My interests lie in experimental condensed matter/physical chemistry, although I think this question applies to any field. As we all know, modern science is big and expensive. I was considering some smaller schools, but was...

Hello, I'd differentiate between two different UPs: 1) The one talking about the standard deviation and which is in essence a statistical UP only appearing when comparing N identically prepared measurements; 2) The historical one talking about experimental errors and thus supposedly...

Hi, so I am trying to build a cell counting apparatus using light scattering. The setup is a (green) laser shining through a clear bottle full of (Dicty) cells suspended in a stirred solution. The idea is to put a photodetector at some angle by the bottle; a greater cell density should result in...

Is the CMK matrix a constant for all experimental energies that we can presently explore? Thanks for your help!

Can you clear something up for me? I see that the discovery of the W and Z boson in 1983 is described as confirming the electroweak unification theory. I was thinking that the W and Z were carriers of just the weak force. I don’t see how the experimental discovery of the W and Z show...

So I know that "Conciousness as the Fifth Force" gets a lot of hate around here, but hear me out, this is legit. So my mother always told me "A watched kettle never boils". The other day, I found this out to be true. Every morning (okay, sometimes it's the afternoon) I wake up and put on...

Maximum "jerk" for experimental module 1. A landing module has a mass M with three springs each of stiffness k that hover over the surface (height not given). If the final touchdown velocity is to be Vtd, what is the maximum jerk (time rate change of acceleration) the module experiences given...

in projectile motion, why the experimental results are different with theoretical result? thank you

Whats the work life of an experimental physicist like? Hours? Pay? Activities and duties? etc. etc.

Hi everyone. I am currently carrying out an experiment whereby I have a closed tank of water submerged in a larger tank. The water in the smaller box is heated and I am interested in the heat loss from the tank. I have done a rough theoretical calculation based on U values, where by I obtain...

If I look at physics threads here, I can find hundreds of people who want to do theoretical physics but not so many want to do experimental. Why is that? Most of the beauty in physics has come through experiments, after all. I especially liked the Cavendish experiment which was an awesome...

Hello. I’m sure that this question has already has been asked, and if so, I would highly appreciate it if someone would link it to this thread. I’m torn between choosing a career of experimental physics or of engineering, and I’m wondering if there is any possibility of doing both. I have...

As an example of how far things have come post Bell/Aspect, here is a just announced experimental test which limits any future expectations one might have on "completing" QM: An experimental test of all theories with predictive power beyond quantum theory, Terence E. Stuart, Joshua A. Slater...

I'd like to hear what people have to say about the following paper, which is way beyond my level knowledge, but could be exciting(?): http://arxiv.org/abs/1104.2302

Does anyone know where I can find experimental data on the life time of charged pion decay? More specifically the life time of a negatively charged pion decaying into either an electron and an electron neutrino or into a muon and a muon neutrino.

Hi, I've spent an enormous time through coursework and self-reading on learning different things in basic particle physics theory, such as scattering cross-sections, decay rates, etc. I am looking to connect the things I have learned in theory to experiments. This may seem a little vague, but...

Can someone give me some specific experimental predictions that come from string theories--things that at least in principle could experimentally unambiguously be confirmed or disproven? Thanks.

HIGH (800C+) wall temperature measurements - experimental help! Hi All - I'm seeking some advice from any experimentalist types. I'm working on a project analyzing heat transfer properties of exotic fluids. We have a simple experimental setup: laminar flow in a small diameter stainless steel...

Hi guys, I have a few questions that's been bugging me for a while and finally decided to post it in hopes to get some feedback. Tech background: Mechanical engineer BS, will be getting MASc. in ME as well. Although my degree is ME, my focus in undergrad had been on CNC machines/CAD and my...

Homework Statement We carried out an experiment where we launched a steel ball at different degrees. We then calculated the launch speeds for each launch angle. We got a percentage difference of 2.8% between the "most different" values. What are two qualitative reasons for this error...

I am an engineer student working in nuclear research. I am performing some experiments looking for an empirical equation to apply to results in a test section, but am having trouble making a mental leap. Here is the core of the problem with all of the engineering 'fat' trimmed off: I have a...

Does anybody have any experimental data on flat back airfoils. I would like to know the experimental data, experimental setup and initial flow parameters etc. In case if you find it from a report I would be glad if you can give some information regarding the report, such as author, report name...

Experimental Physics Courses?? Hi everyone, I have some problems with Experimental Physics courses. I'm senior physics student and I have taken 2 experimental course (out of 3) so far. In my university we spend six hours doing one experiment and submit a report at the end of the lab. The...

I am a third year graduate student in physics. I came here wanting to do Theoretical studies of dark matter. But there really isn't much money in that. Plus the fact that only first year TA's get jobs in the summer hurts alot. I heard the job outlook for Theoretical Physicist isn't that great...

Since the possibility exists that a positron can fall into the well of potential surrounding an anti-proton, it begs the question, have any anti-atoms or anti-molecules been observed in a laboratory or elsewhere? If so, where can I find any description or details of the observations?

Is there some rumour about experimental measurements of decays into two photos that I have missed?

Is there a known formula or method to find the linear coefficient of thermal expansion for all materials? I'm curious about what are the variables.

hi, I wonder if the stress energy tensor formulation of general relativity has been well experimentally verified, since the schwarzchild metric is used most of the time. for example, is there any experimental evidence that an increase of the pressure with the same energy density, increases...

http://prime-spot.de/ESQG10/program.html Comments: http://backreaction.blogspot.com/2010/10/experimental-search-for-quantum-gravity.html

Does anyone remember a program (or know of something similar!) which, given a compilation of data, would search for equations which best fit the data? The one I'm thinking of came out ~ a year ago. It was a Windows-only program but it worked fine under wine. Unfortunately my time spent on...

hi, I am doing a project on special relativity (im 17, doing A level maths, further maths and physics) for this project, I need to analyse some data. can anyone tell me where on Earth you can find data from experiments which give empirical evidence of special relativity, like muons...

Hello, I'm looking to derive the error of a quadratic equation as a function of x. y=ax2+bx+c y is measured and variables a,b,c have an associated error Da,Db,Dc To solve for x you complete the square. x=&\pm\sqrt{\dfrac{y-c}{a}+\dfrac{b^{2}}{4a^{2}}}\mp\dfrac{b}{2a} If the variables y,c...

Can i know what may account for the difference between our experimental value of Planck's constant and the accepted value of it? Did anything related to the light effect(it surrounding when we doing our experiment)??

What are the best things to learn during your PhD in terms of helping you get a job in physics afterwards? Spectroscopy? FPGA Programming? Vacuum techniques? Nanofabrication? etc. Please give some examples with reasons.

I have a 5mm diameter, 10mm long magnet, a short (6mm) coil of 50mm diameter, and an oscilloscope. When I move the magnet through the coil, the oscilloscope shows that the signal (voltage) looks pretty much like the derivative of a Gaussian function. So there must be magnetic flux maximum when...

So I am considering attempting to build a couple of projects to fill in some time, and I am looking for critiques and help on creating these.. Both deal with spherical metal balls (most likely iron, or maybe even a magnet) and a magnetic field. 1. I would like to make something like a...

I am currently a graduate student, have a MS in physics, and have passed my comprehensive exams. Most of my credits are done -- I only have my dissertation credits to do. So far all my work has been in experimental physics, in the region of plasma physics. I have recently realized that I...

Can we learn anything about the status of QG phenomenology by checking out the abstracts for the July talks? Bee Hossenfelder, who occasionally posts here, has organized a conference, set for 12-16 July, on Experimental Search for Quantum Gravity. Just as a side comment: a lot of conferences...