Experiments Definition and 460 Threads

I thought this was the appropriate place for what is essentially (at least to my mind) a pholosphical idea. Has there been a fundamental change in the way scientific experiments are evaluated? Has the standard of proof shifted, as indeed it probably has to, due to the phenomena we are...

Greetings, I'm trying to design a small lab system that grows Aspergillus Niger on a solid agar base and I've been thinking of making it from acrylic and using some sort of adhesive to hold it together, but I know some adhesives contain anti-fungals, etc. or they just happen to contain a lot...

Is there a 'proof' for this law? or is it experimentally derived..Thanks for reading

* I'm looking for a list of the major physics experiments on the internet that will show how the present understanding of electromagnetic radiation, sound, atomic and molecular structure etc came about. * So far I've only found the following lists. Once I find a more complete list of the people...

interesting video. The more research I try to do behind this - the more confused I get. Apparently he uses some form of diamagnetic levitation which some say was faked for the documentary. I'm skeptical but I have to admit the video is damn interesting.

I'm not sure how to answer this question, so I'm turning to you guys for help. The question, specifically, is: "When timing the fall of a ball, how would you achieve greater precision, with larger or smaller heights?" Any help would you appreciated.

Hallow I want to know why if I throw 2 balls and one ball is bigger and whit more mass Why the two balls arrive to the ground in the same time This is the experiment of glilio glili Also I search after more experiment in mechanics (physics) like this Or like this experiment - if I throw a...

I live in Wisconsin and I am looking for a wind tunnel where I can conduct a number of airfoil experiments. Since I am in high school, I am not yet affiliated with a university, so it is difficult for me to get in touch with lab technicians at universities. I have successfully contacted the...

Hello, Here is my scenario: I am trying to run a code a 100 times, so I use a for loop statement i=1:100. The 1 to 100 stands for 1 to 100 days. Now I want to see how much randomness my results give and so I want to simulate this whole 100 days thing twice. So I think my code would look...

I know I just posted a similar topic but I guess you could call this the supertopic. Does anyone know of videos (either on youtube or elsewhere) that actually do an experimental demonstration of something quantum mechanical (i.e. impossible to explain classically) OTHER THEN THE DOUBLE SLIT...

i am rather interested in chemistry, and i am about to take a college course in it in my senior year of high school. does anyone know of some cool, fun, or relatively simple experiments i can do at home?(i've already worn out the old vinegar and baking soda one.hah) thanks in advance. -Tom

I've seen redone Cavendish experiments on YouTube where the 2 lead spheres suspended from a latter rotate to to slightly larger lead stationary bricks. The spheres rotate and touch the bricks. This must be fake. Gravity is just not that strong a force. My guess is that equilibrium is attained by...

The classic reference on this is Bell's (highly recommended) polemic "Against measurement", which is in the 2nd edition of Speakable and unspeakable in quantum mechanics (but not in the 1st edition; it can also be can be found in the original, Physics World 3 (August 1990), page 33). A quote to...

Hello everybody... i want a book that talks about some clever applications and problems in the fundamentals of physics >> >> also i want a book that take the famous concepts of physics and prove it or justify it clearly with pictures , mathematical proofs, clever...

On pages 23 & 24 of the book Superforce by Paul Davies - The unusual occurances of electrons or other particles as they approach a barrier are described. I would like to know what devices are used in these experiments? What device shoots out electrons or other particles in a single stream...

My apologies if this should be in the homework section, but it's more just a basic conceptual wall I've come up against as I think independently (with little math---just trying to get a very basic conceptual grasp of relativity). That said: Say there is a Clock A at Point A and a Clock B at...

could someone provide some links to some of the experiments that establish the maximum radius of the electron. preferably with some explanation of how it works and what the raw data was. google is not much use. but not experiments like the penning trap that just measure g. (gyromagnetic ratio).

Ok, I'm rather new to electronics as I've only taken a high school-level electronics class and that was several years ago. Right now I'm trying to put together a low power heater consisting of a length of nickel chromium wire and a DC or stepper motor. What I'd like to do eventually is be able...

Just a quick question regarding the sources used for investigating entanglement (of photons). There are two types of production method as I understand it: ('Fundamentals of quantum optics and quantum information', Peter Lambropoulos, David Petrosyan, 2006, Springer): Page 242 "In fact...

like a link that describes an entanglement experiment from start to end or something like that. I am just learning this quantum stuff, and i understand what happens AFTER theyre entangled but not HOW they get that way. do you just select 2 particles at random, put them in a jar, boom theyre...

Hello! I'm new to the forum and quite interested in the wealth of information and exchanges that seem to go on here. I found my way here a couple of times before looking for some information on other experiments, but was too lazy to register, lol. At any rate my query is related to the...

Hey all, I'm been working on creep in metals for a while. Could anyone please suggest experiments I can use to show the balance of recovery and strain-hardening in creep. Any guidance would be pretty helpful.

I would like to know about the most precise or most recent experimental tests of time dilation. Either based on particle lifetimes or on atomic clocks. Thanks

Hey, I'm just trying to make sure I understand the concept of hydrostatic equilibrium, so I devised two thought experiments that (depending on how they resolve) should really help clear up some confusion I have. 1. A tank of water, 1000 meters in the x and y directions but only 1 meter...

I would be interrested to learn about it. Thanks

4 middle school students,tell me wat i need, and its better is a interesting chemical experiment safty!

Hi, I am supposed to design 2 experiments for my senior year Chem class. Right now I cannot think of anything that is interesting, relatively advanced but at the same time at a high school level (its only a design lab so I can include advanced equipments). Topics that interest me the...

Homework Statement okay so I am going to do a lab on reaction rates, there's a table given (effects of varying concentration) there are 9 reactions, I will just give one, ( if i can figure this out ill figure out the rest on my own) so reaction #1 flask A contains 7.50mL of .200M KI...

Further to my recent post on not understanding why physical length contraction in Lorentzian relativity doesn't imply an empirical difference with Einsteinian STR: It seems to me that Bell's theorem and the Aspect EPR-style experiments demonstrating non-locality in quantum mechanics imply an...

I need to do experiments to investigate the behaviour of gyroscopes but I'm not too sure what I can do.I've thought I can use a bicycle wheel and string to demonstrate precession, but I need experiments which I can take recordings down from. Thanks for any help!

I know this is stupid, but would it not be nice if a prediction could be tested without multi billion dollar experiments, or have to wait for many years to be tested, it seems to me that we have many predictions in the wings awaiting discovery, Gravitational radiation, gravitons, supersymetry...

Hi. I am writing preschool science activities and would like to verify what the scientific principles behind them are. First example: when you put raisins in clear soda pop, exactly what causes the bubbles around the raisins to pop when they reach the top? Is it only the outside air...

I am having difficulty understanding why the single rate of detection (as opposed to the coincidence rate) is unaffected during Quantum Eraser experiments. I'm looking at the great Kwait, Steinberg and Chiao paper: 'Observation of a "quantum eraser": A revival of coherence in a two-photon...

http://arxiv.org/abs/0809.0616"

I find that in the lab I feel overwhelmed when doing experiments with the rest of the class. What did you guys do to feel comfortable carrying out experiments? I mean, I'm always unsure of what I'm doing..any tips guys?

Hi everyone In my attempt to understand the details of Stern Gerlach experiments and measurment issues in quantum mechanics, I have come to believe that there is a lot to be learned from some of the basic thought experiments like interference and Stern Gerlach described in books...

Please, I need a list of definitive experiments that revealed light's nature.

Here's a thought experiment that I would like you to comment on. Suppose you could construct two spaceships of exact design. I will call them spaceship A and B. Then let us also suppose you could construct a cable, or any tether device, sufficient enough in strength to be attached to the rear...

A very noobish physics question: Has it been experimentally verified, that individual photons get refracted, for example when shot one at a time through a glass, or does the refraction occur only with classical electromagnetic waves?

Hi Are there any exciting experiments for the conservation of linear momentum?

Ok, I've been taught this stuff in school about the particle/wave duality. And what's been always bugging me is that it doesn't really tell me anything : I want a theory that is cohesive without compromises. SO...I was shown an experiment similar to Young's 2 slit experiment. It has a half...

Are there any simple drag experiments (one with limited knowledge in physics and expensive equipment) can conduct? Perhaps one with which involves varying materials.

Can you explain me how to realize these experiments? I would to reproduce them. http://it.youtube.com/watch?v=c3asSdngzLs http://it.youtube.com/watch?v=t7s3cvm6CfY&feature=related Can you explain me the theoretical bases of those experiments?

Hi, is there anyone who can give me some good links with experiments. I want to present physics to younger pupils (end of elementary and first and second grade of high school). Thanx

1. In one of Thompson's experiments he placed a thin metal foil in the electron beam and measured its temperature rise. Consider a cathode-ray tube in which electrons are accelerated through a 2,000 V potential difference, then strike a 10 mg copper foil. How many electrons strike the foil...

I was wondering about what experiments are planned or being done now to test the properties of gravity, such as is there a graviton, is MOND real, and other such questions. As I recall there were (maybe still are) a group of Washington scientists working on a torsion pendulum experiment that...

Homework Statement Does anyone understand the basic theory behind NMR experiments such as the one shown here http://www.ifw-dresden.de/institutes/imw/sections/22/laboratory-for-pulsed-high-magnetic-fields/nmr/nmr_exp.gif. If so I have questions.Homework Equations The Attempt at a Solution

A revolving satellite is similar to a lift which is falling from a height. Only the difference is that the satellite has a very high horizontal velocity due to which the satellite moves forward while falling to earth. And when the Earth's curvature and the lift's downfall match, the satellite...

Are there any experiments or research one can do at the molecular level? if so, what are some suggestions?

(N.B. - Not sure if this is the right forum!) Does anyone know discussions of or actual computer simulations of quantum entanglement experiments designed to test the Bell Inequality? Has anyone tried to make a computer program that would simulate a "local realistic" view of QM?