Experiments Definition and 478 Threads

klotza submitted a new PF Insights post History's First Science Experiments Continue reading the Original PF Insights Post.

I read phys.org and science daily, daily. I read about all these amazing experiments and discoveries and I want to try my own experiments. A lot of articles are about emerging computing technologies, and often the article emphasizes how inexpensive these materials and processes are becoming. I...

I've started making my own sugar-based hobby rocket engines and I want to work on creating a de Laval nozzle for the specific fuel type and configuration I'm using. I don't have the resources to measure things like chamber pressure and exhaust temperature, so I wanted to try and develop an...

Reading about the early Quantum entanglement experiments by performed by Ernst Bleuler and H.L. Bradt and independently by R.C. Hanna in 1948, they basically used a pair of Geiger counters set around sodium22 and when an electron annihilation event occurred that produced a pair of photons the...

I'm wanted to do an experiment with interfacial polymerization; producing nylon 6,10 with sebacoyl chloride and hexanediamine. I was wondering what aspects of this reaction I could research, or what variables I can change?

I was wondering if there were any possible experiments that I can conduct in a high school lab setting.

Hi again, probably this seems to be a simply question, but in last days i becomes a really strange one. We all know that there are many kinds of constants in physics, some of them, are found experimentally with great accuracy in too expensive projects, but no matter how accurate can be measured...

As I understand it most, if not all, experiments carried out to test Bells theorem test the local hidden variables assumption that photons have definite polarisations. What I would like to know is whether experiments on properties other than polarisation have been carried out. If not are there...

Hey guys, So this is what actually made me join today. We are taking a interfacing class were most of us students don't even know how to code. However, I currently work in one of the research groups under the professor who is running the class, he gave me the assignment to figure out what parts...

I am getting confused as to which experiment proved that the speed of light was invariant in a vacuum. At first I thought it was the Michelson-Morley experiment but that does not have a moving observer.

In Galilean Relativity, laws of mechanics are invariant across frames. In all the frames they are the same. So, in Dynamics and Relativity by W.D.McComb, it is written that this implies you cannot perform any experiment in an inertial frame that can tell whether an inertial frame is moving or...

Hello Everyone! My name's Christina and I work at the Everyman Theatre in Liverpool... We have a show coming up in the main space at the beginning of July that's going to be performed by YEP (Young Everyman and Playhouse)... and hopefully it's going to be a love story about all things Physics-y...

I've been trying to find information on how Bell's experiment works on the macroscopic scale. I think that the scale of current measurements is meters, for the most part. I've been curious about how Bell's Inequality is supposed to work, Relativistically. Haven't found quite what I'm looking...

Layman question here. I have often read that the known laws of physics, QM and Relativity, do not make a difference between past and future, they are perfectly reversible in time. The only fact which gives time its preferred arrow is the 2nd Law, the increase of entropy, which manifests in the...

Can science text writers please stop repeating these sorts of unfounded, unscientifically grounded anecdotes in science texts as if they are fact. I was just reading in Universe 8th ed. astronomy text and found this passage: "Sadly, Goodricke paid for his discoveries with his life; he caught...

In a typical collider experiment, two particles, generally in approximate momentum eigenstates at ##t=-\infty##, are collided with each other and we measure the probability of finding particular outgoing momentum eigenstates at ##t=\infty##. Firstly, what does it mean for the particles to be in...

So if you wanted to do some induction motor builds and experiments, what PSU would you use. I guess I am looking for a bench top AC multi output system that has ability to supply out of phase 2nds and maybe 3rd??

I need to build up knowledge about Design of Experiments and have a fundamental question about the real goal of DoE. Most classical texts start with discussing in considerable detail full factorial design plans where each factor only has two levels. The underlying statistical model is...

Hello! I am new to this forum so I don't know if I am posting this under the right part. Anyway, I am an undergrad and my phys 101 mechanics course requires to come up with an experiment related to the course content, write a report on it and present it to TAs. I decided on a simple pendulum...

Let's say that, for the purpose of a thought experiment, I want to use the following as a calculation of the speed of light. Assume the following scene is an inertial, non-accelerated frame. 1. I have two clocks, A and B, which start out one millimeter from each other, and are perfectly...

Hi all, I'm a bit confused on this problem in my book. "Specify the values of n, p, and q and list the possible values of the random variable x. Sixty percent of U.S. adults trust national newspapers to present the news fairly and accurately. You randomly select nine U.S. adults. Find the...

Anton Zeilinger of the University of Vienna was trying to design experiments to produce certain quantum states and wasn't having much luck doing it. "I realized I was just guessing," he said. So why not have a program do that guessing. It can try a million guesses. So he did. While the...

Homework Statement Here are the free response questions:[/B] https://secure-media.collegeboard.org/digitalServices/pdf/ap/ap15_frq_physics_c-m.pdf Here are the solutions: https://secure-media.collegeboard.org/digitalServices/pdf/ap/ap15_physics_cm_sg.pdf I do not understand how they solved a...

Imagine a mass that disappeared from space. I know that it is impossible, but imagine it is sucked by a wormhole or it just disapperars. Will we detect ONE gravitational wave only? Like a pulse and nothing else? Now the other way around. A mass appears from nothing. Then we will detect one...

I'd like to discuss the question in the title, following up on my remark quoted below. Note that I don't want to repeat the discussion in https://www.physicsforums.com/threads/tracks-in-particle-detectors-and-quantum-paths.758778 so maybe reread that one first! The traditional analysis is...

I am a 1st year undergraduate student. I am in need of some fascinating applied physics/ engineering physics projects that two 1st year undergraduates can complete in about 10 working hours, and as such not very difficult. We would like a project that we could build inexpensively, and calculate...

Hi. I hope this is the rightplace to ask this. Sorry if it isn't. I'm looking for a resource (book, web page, etc) and I don't know if it exists so I'll describe it. I want something that lists actual experiments that complement or back up the topics listed in a typical QM textbook, so I can...

In 1935 Albert Einstein, Boris Podolsky, Nathan Rosen, and Erwin Schrödinger introduced the notion of quantum entanglement. What prompted that notion and what justified their belief it was a real phenomenon?

I have read that very high precision attempts to confirm the constant speed of light in all directions have been successful. For example in 2009, Stephan Schiller's lab was able to achieve a precision level that was one hundred millions times more precise than the original Michelson Morley...

Homework Statement I place a water filled beaker on an electronic balance and zero the reading. Meaning the balance will not be measuring the weight of the water and the beaker. a.) If a ball is resting at the bottom of the beaker. What would the balance be measuring? b.) If I immersed and...

I have just entered the 3rd year of a Physics degree and I am required to choose four experiments from the following for the practical laboratory. Ive had a decent look into subject area each experiment embodies but I feel I don't have a good jist of how they really are, and I know I don't...

Hi everyone, I'm taking a Design of Experiments class which is focused on statistically designed experiments. I'm a bit lost for project ideas and this is my first graduate class. Would anyone have any ideas for an experiment that would have at least controllable factors that might have...

Homework Statement Problem Consider a random experiment with a sample space S={1,2,3,⋯}. Suppose that we know: P(k) = P({k}) = c/(3^k) , for k=1,2,⋯, where c is a constant number. Find c. Find P({2,4,6}). Find P({3,4,5,⋯}) I am primarily interested in part 1, finding C. The rest...

We all know the coordination number is an important characteristic of a system consisting of many particles. But in experiments,except CT,do we have any easier and cheaper way to know it? Thanks for help.

Before posting reply, please think about time as a concept that is used to describe a change relative to some other change. For example, a traveler will arrive on a destination after Earth completes x rotations. At the beginning, people used Earth rotation as a reference change and called it a...

The more i study this strange element, the more interesting it becomes. I found that bismuth only shows it's colorful oxides when exposed to air while hot/molten. I decided to go outside and polish the sample using an abrasive liquid known in Brazil as "Saponáceo Cremoso". Don't know what it's...

The idea of this thread is to make a kind of collection of experiments of important scientific facts that you can do at home. Many students in high school are quite frustrated with science, because they see it as a collection of facts to memorize. The purpose of this thread is to show how many...

Hi. I'm learning about special relativity and want to see whether I understand it correctly. As such, I had 2 thought experiments that I answered, and I want to see whether these answers are correct. If not, could someone please tell me the correct answers? Thanks! Thought Experiment 1: Super...

(Hope this is the right forum) For my year 12 physics EEI (extended experimental investigation) basically a report. I was hoping to find a suitable quantum mechanics experiment that i could conduct. Does anyone know of an experiment like this? Thanks in advance

I was wondering are there any experiments to distinguish between 2 and 3-body decays? For example, consider decay of the muon and the pion: The pion only emits 1 muon neutrino ("missing energy") and 1 muon. The muon however, emits 1 muon neutrino, 1 electron neutrino and 1 electron. How is...

Has electron recoil due to photon emission ever been confirmed by experiment? cause I can't find any reference to electron recoil being measured anywhere I look. If it has been measured, what methods do they use?

Hi, I'm so hungrey for learning about the history of physics and chemeistry and learning how the experiments werer performed throughout history (The actualy experimental setup, and how the equations were derived). Are there any good boks to be recommended? There must be some books that actually...

My knowledge of Earth science is basically null so please bear with me.My first question relates to the soundness of assuming a primitive atmosphere rich with H2O CH4 NH3 and H2 gases (Also not too much presence of O2, as the Urey-Miller atmosphere has to be a "reducing atmosphere"). The...

I would like to start a discussion about the most basic principles behind quantum eraser experiments. I understand this has been debated here many, many times and for some of you there is nothing to talk about, but I still find it interesting and would like to get some of your opinions. I know...

So say we have a stick in space with the CM in the middle and we apply two forces of equal magnitude and direction over the same time, one force at the CM, and the other at some distance away from the CM. Ideas: 1. One would obtain just translational motion the other would have both...

In double slit experiment with a single source,I am finding the traces of one slit when I have the other one open. I think this is due to diffraction effects.May I know how to tackle this?

Supersimmetry, by itself, is a neat, elegant concept; I've read somewhere else (think Griffiths' Introduction to Elementary Particles, if memory serves me right) that it allows the various running couplings of the Standard Model to converge to a single value at high enough energies; however...

There are two categories of objects, A and B. From long term observation, experiment 1 is known to be 70% accurate i.e. it predicts type A or B correctly in 70% of cases. Experiment 2 is totally independent. It uses different methods and different characteristics. It is also known to predict...

does the double slit experiment with the Delayed Erasure follow-up experiments prove that objective reality does not exist ? How is it possible to detect the particle without affecting it? My understanding up until now has been that the results differ with/without a measurement because the...

Homework Statement If Thomson's "plum pudding" model was correct, what could have happened when Rutherford fired high energy alpha particles at gold foil?Select all that are True. Alpha particles are reflected. Alpha particles pass right through with no deflection. Alpha particles...