Experimental Definition and 494 Threads

Hi everyone, I am looking for any available experimental data which models off-road vehicle travel in clay and measures tyre and soil parameters. Parameters I am looking for include pull, torque, shear strength of the soil, sinkage, slip and deflection. If anyone knows of any available raw data...

I like physics but i don't want to worry about having enough money to afford a house or an apartment and l like would like to eat out without a coupon.

Homework Statement The diagram shows the impact of 20 projectiles launched at the same speed and angle. What is the uncertainty in the impact position? (see attached file for picture of diagram) Homework Equations No equations, my lab instructor said through an email that I can get it "just by...

Homework Statement I need to find three potential reasons for my .5% error in a lab where I used the Archimedes Principle to measure the density of Iron. We only used a graduated cylinder full of water and an iron mass. I measured the water level from the meniscus. We used two different...

I'm looking for experimental correlation curves in Violation of Bell inequalities. I found only one in http://arxiv.org/abs/quant-ph/9806043 Do you think as an amateur we could ask per mail this data to professionals having done this experiment ?

Hi! I have performed an experiment measure force on a wire with electric current in a magnetic field. I got 3 graphs: Force as function of length (L) of wire, Force as function of current (I) and Force as function of magnetic field (B). In all cases, I got approximately a straight line through...

A great new experiment is reported closing simultaneously the loopholes of detection (fair sampling assumption) and distance (locality assumption): Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km B. Hensen, H. Bernien, A.E. Dréau, A...

I am told that even macroscopic objects like footballs obey the wave equations of quantum mechanics. Is there any experimentally based reason to believe this, or is it just said as a way of generalizing the theory?

Can someone recommend me a book that has all the experiments performed in physics from Classical Mechanics to Quantum field theory? (From the beginning of classical mechanics till today)

I am a beginner to Experimental Modal Analysis and I have a scaled miniature frame and my objective is to conduct modal identification under the structure's operating condition using Frequency Domain Decomposition (FDD). However, after I expose the structure and take the reading, the results...

Homework Statement Decay of Carbon-11 from given data of count rate at time 0 to count rate at time 14 minutes in 2 minute intervals. Homework Equations I feel like I've gone wrong here because the answer I get of 19.6 minutes is actually negative if I go back and do the last equation again. I...

Both string theorists and loop quantum gravity theories have proposed that space-time may be something other than the perfectly smooth, perfectly local space of classical general relativity, which can potentially lead to path dependent phase alteration of light from a common source due to the...

I was watching a sixty symbols video on Stephen Hawking: , and it got me thinking. Is there any practical value for theoretical physicists, if what they are doing is simply speculation not backed by any data? I understand observing a physical phenomena, and from understanding it predicting new...

Hi everyone! I was admitted as an undergraduate transfer student to MIT and Harvard College for Fall 2015. I am now stuck deciding between the two. Which one do you think is better for studying experimental condensed matter physics or just physics in general?

We have built a cold gas cannon that utilizes burst disks as the means to quickly release the built up pressure with maximum flow. The bore for the burst disk is 2" and the material is Brass 260 H02 (1/2 Hard). The disks are solid and flat (i.e. no scoring or features to promote a certain type...

Newton, Poincare, Lorentz and Einstein (around 1921) believed that there is a preferred frame of reference. Einstein changed his mind when he saw that he is going against mainstream. Michaelson Morley experiment and subsequent experiments are regarded by most people as proof that there is no...

Hi, I'm looking to do an experimental physics PhD (currently on an experimental Masters program), and I was wondering what my chances of getting into investment banking (quant) are. I am aware that theoretical physicists are primed for such a position, but what about an experimentalist? I can't...

The following experiment claims that it has demonstrated the wave-function collapse: http://www.nature.com/ncomms/2015/150324/ncomms7665/full/ncomms7665.html I would have no problem if they have claimed that, the experiment demonstrated the "non-local" (or: precisely quantum) steering effect...

Homework Statement These are the pre lab tasks for my upcoming lab. Find the theoretical value for moment of inertia for a ring with off axis rotation using parallel axis theorem and outline procedure to obtain experimental value of I. During the lab we will be using a rotating platter with a...

Is there any direct experiment to determine the value of mean free path(not the distribution) of a gas molecule?

What would be a great experimental setup to test for Unruh effect? is it real or not? It has huge consequence because if it were true, vacuum or even particles are just mirage.. because in an empty box.. steady observers would see nothing while accelerating observer would see it full of hot...

Hi, I find an interesting related to electric field when doing experiment. I put a chip which has the following circuit inside Scanning Electron Microscopy(SEM), an electron beam is irradiating on R1. The AC source is isolated from Earth by using a capacitor C1 and resistor R3 in the...

"2 theories, same experimental predictions, can one fail but not the other ?" (above was intented to be the title, got truncated) Let’s say we have 2 physical theories, call them A and B, that make the same experimentally verifieable predictions. But they are based on different postulates. And...

Homework Statement A quantity of water in a beaker of negligible thermal capacity is cooled to a few degrees below freezing point. The beaker is then placed in a warm room, and the times recorded at which it is at various temperatures as it gradually warms. The observations were...

I'm currently an undergraduate double majoring in physics and math and hoping to go into theoretical physics. It seems to me that there is very little I can do now in terms of research on theoretical physics, simply because of the knowledge required (please correct me if I'm wrong). I can get...

(I don't know if this is the best place to ask this, if not please feel free to move it elsewhere or delete it.) A number of Quantum Gravity papers explore the evolution of Black Holes and their potential transition to White Holes, and some discuss the possibility of astronomical observation of...

So far I have only found the initial papers of Deaver, Bascom; Fairbank, William and of Doll, R.; Näbauer, M. Is there any later and refined similar experiment result?

Next semester I will be taking Experimental Physics II. The gist of the class isn't to do an experiment per se, but to build a device which could be used in an experiment in Experimental Physics I. In the past, students have built things like an inverted pendulum, a magnetic pendulum, and a...

Homework Statement For my coursework task, i am to quantify and discuss errors associated with an experimental procedure. This involved a thyristor control unit which allowed the firing angle of two thyristors (in a half controlled bridge rectifier) to be varied with a rotary dial or pot/rheo...

Hi everybody, my question is not properly about CFD but mainly about Fluid Dynamics itself. I have performed a RANS simulation of a round jet of methane and air and now I'd like to compare those results to some experiments. Unfortunately there aren't papers about experimental data for...

In the book, 'Scale Relativity and Fractal Space-Time: A New Approach to Unifying Relativity and Quantum Mechanics', the author, Laurent Nottale, makes a few interesting comments in the introduction of his book which seems a bit unclear to me. In the general introduction of the book, Nottale...

Hi All, I'm trying to design an experiment for measuring force along a cable. The cable is will be held in a persons hand and the other end will be fixed to a transducer to measure the force of tension. In order to account for the multiple force vectors, I thought of using a gimbal table or...

Hi guys, I was wondering could I get some help with determining the experimental critical buckling load of a pinned ended strut. I am hoping to compare predicted values from Euler buckling and Perry Robertson to experimental values. I have carried out a experiment where by I applied a axial...

I am trying to convert galvanometer into an ammeter. But after finding Galvanometer resistance and shunt values, and cut a wire according to that thickness and connected. But still, the galavanometer reading is not similar to that of the standard ammeter reading connected in the circuit. Any one...

Direct experimental evidence of time slowing down for moving clocks is well-known. With the advent of atomic clocks, round trip journeys taken by these clocks on slow moving(compared to light speed) jets show time differences with clocks that have not taken the journey. But is there...

Does anyone know a reference with a discussion on the experimental determination of the metric tensor of spacetime? I only know the one in "The theory of relativity" by Møller, pages 237-240. https://archive.org/details/theoryofrelativi029229mbp

I am looking for a book on physics to recommend to motivated laymen who don't want popularized information about the thing they are interested in but who want the real thing: what is physics, what methods are used, how to develop physical intuition, etc. Also, I am looking for a book with an...

I know little about the experimental measurements of heat capacity. I can see you'd need to know both how much energy you've transferred to a nanoparticle, and measure the temperature change resulting to ascertain it. This brings me to my questions: How effective is laser heating of...

I'm trying to get an understanding on what's going on with some data of mine. I've attached some plots below. This data is from and accelerometer and gyroscope where I've calculated the global accelerations and velocities (top and bottom plot respectively in each figure). The data is from the...

Hi. I am calculating the pressure loss through straight pipes and pressure loss through pipe fittings. I need to compare the theoretical value with to the actual experimental values. But the thing is, do I use the Darcy equation for both calculations or are there separate equations to calculate...

Hello Everyone. I'm pretty much a newb on the forum so please go easy :). My name is Mark, I'm from England, I'm in the late stages of my 15th age and I'm Home Educated. Now.. Where to start? I guess Primary School would be sufficient. Well, I started it as every other child does, however over...

In studying QM, it's been very abstract. I'll read things such as, we get an eigenvalue when we measure an observable. Or we prepare an ensemble of particles in the state \Psi . I understand this in an abstract way, but I don't understand what it actually means to get an eigenvalue when a...

Hi, The reason I'm posting this is because I'm trying to understand how to interpret the wave function of a particle. I'm trying to decide which interpretations of quantum mechanics are just speculation, and which ones are consistent with experimentation. I know that quantum objects such as...

Hey Everyone, I know that I enjoy physics and I enjoy research. My past research experiences have been in high energy theory and I worked on two different projects, and loved them! These experiences motivated me to pursue graduate studies in physics. I graduated from undergrad and I am...

Homework Statement I am writing a lab report for an X-ray diffraction. I have been attempting to come up with an equation for the error using formulas some people from college gave me and also some I found on wikipedia but I am quite sure I am doing it wrong. The only variable is the angle...

Homework Statement I am writing a lab report for an X-ray diffraction. I have been attempting to come up with an equation for the error using formulas some people from college gave me and also some I found on wikipedia but I am quite sure I am doing it wrong. The only variable is the angle...

Hello, I'm writing a paper for school about becoming an Experimental Physicist and have a few questions: 1. What degree or other credential is required to have this job? 2. What is the job outlook? (Upcoming retirements in the field, number of anticipated openings, any other...

Hi all It may sound rather silly, but I am a second year graduate student doing experimental condensed matter physics. Recently I've been thinking about the future like job aspects and salaries etc. One of my friend recently transferred to medical physics PhD and said its better in job...

I am trying to experimentally derive the drag equation. I have dropped coffee filters with varying masses and determined their resulting terminal velocity. I plotted the data and found that the mass of the coffee filter is proportional to the terminal velocity squared. I was now wondering how I...

Good morning, I request the guide of Physicists with experience in the experimental physics. I'm in my fifth year of bachelor in physics, because in my country (Colombia), most Bachelor degrees have a duration of five years. My plans are to perform a master's degree next year, and then continue...