Experiment Definition and 1000 Threads

A nice experiment to not only find a method to estimate ##\pi## but also to demonstrate how difficult pure randomness can be difficult to achieve:

I notice that @AlexB is banned. On first blush, I suspect that this is part of a test; he spoke to me about wanting to be blocked temporarily as an experiment. Did he also speak to the moderators about a similar experiment?

Hello, My 10 year old is doing a science project in which he places a zinc nail and copper nail in a liquid, hooks each nail up to a voltmeter and then measures the recorded voltage for each substance. Liquids include lemon juice, distilled water and ammonia. The book from which he got the...

This is a water spirometer. You have to exhale as hard as possible the pulley rotates and the pointer shows the volume exhaled. The procedure wants us to keep the pointer at 400 and later subtract 400 to get the correct volume. Why can't we start at zero? Teacher says it is easier to exhale...

TL;DR Summary: i need help making a motor this what i have right now the black represents a wire. i don't think this looks right at all. i also need help finding something i can put under the battery to allow it to rotate.

Hey guys, I’m a high schooler designing an experiment to test polarity modulation for em waves. Before I study complex methods of polarity modulation that involve the use of crystals I want to use a simple laser and rotating a polarizer while the laser differs in its intensity for brief...

Consider two mirrors opposite to eachothers at the mid point between them two photons simultaneously emitted each one towards one of the mirrors. relative to observer at rest to the mirrors at the mid point he will see the photons reflected simultaneously but I think a moving observer won't...

Hey guys, for some context, I’m a high schooler doing an experiment as a passion project, my issue today is an aspect of my project. Anyhow, my ultimate goal is to be able to “remodulate” radio signals by converting them from AM to pulses in a magnetic field strength. While I bet there are many...

How does the classical interpretation of the electron's behavior in Thomson's experiment compare to the modern quantum perspective?

As above: there was, I believe some kind of particle resonance experiment: it doesn't work when the level of resonating particles was the same, but raising part of it up by 20-30m (60-90ft) does the job. Could anyone remind me what it was? Thx.

Does anyone know exactly which kind of polarizers were used in the famous Aspect experiment from 1982? I've read they were crystal polarizers. Does that mean Calcite, or Nicol, or something else? [Reference link added by the Mentors:] https://en.wikipedia.org/wiki/Aspect%27s_experiment

Please review this experiment I watched from a video in YouTube and I think is correct. If there are flaws or there is a better experiment of proving this principle, kindly tell me.

I don't think there is correct answer for this question. This is my reasoning: A) This is correct since most of alpha particles move in straight line B) This is correct since the deflection of some alpha particles is away from center point C) This is correct because a small number of alpha...

Recently stumbled across [Unacceptable reference deleted by the Mentors] and the abstract says that an experiment that spanned 2000-2012 has proven that physics is superdeterministic. I have absolutely no background in quantum physics whatsoever which is why I can't verify or reject the claim...

Lets consider the following experiment: A-------CD-------B where C and D are synchronized clocks (same position), while A and B are two points at the "same distance" from CD. We move the clock C to A and take a photo Pa when it reaches A. We move the clock D to B and take a photo Pb when it...

A conducts an experiment. I don't know how to describe this experiment, but let's say he measures the masses of ##3## things and computes their sum. He finds that the mean mass equals ##2## units of mass. He considers this to be special in some sort of way, something that demands an explanation...

I was reading Optics by Hecht where he states that the law of reflection is only valid statistically and some photons might reach the observation point (P in image, S being the source) by following different paths, that is, the paths for which the angle of reflection is not equal to the angle of...

I'm getting ready to winterize my home and was browsing the insulation aisle at Home Depot. They have a wide variety of insulating products from which to choose: soft foam, rigid foam, batts, etc. I got thinking it might be an interesting at-home experiment to confirm the R-values of some of...

I was feeling very bored so I wanted to play with my surroundings and I had: Crafting glue: And Rubber Dust: Near me so I (for some reason) mixed them together and rubbed them on my hand. After some time it started to take a spherical shape. It lost the stickiness of glue and started acting...

Hi, I start my PhD education, actually offically it was one and a half month. And ı didn't decide to choose to experiment or theoric. Maybe, if you know or study this field,help me to decide. What is this two field advantages in STEM? If ı choose theoric, ı can find a job? Thanks for your answer...

A quantum dot is placed in a line between two optic fibers The dot can emit a photon in every direction which is unknown. If the fibers are combined at a beamsplitter would there be interference if the photon is not observed outside the fibers? Do you know if somebody made such experiment...

Suppose we want to verify that there are curled-up dimensions. What sort of experiments can you devise to check for them? I mean what sort of experimental data are we looking for? (I guess it would be in high-speed particles' accelerators, but sure there are also cosmological observations that...

Hello! I have an experimental setup in which I need to send microwaves (MW). I would like to reduce the unwanted scattering of the MW as much as possible and I was wondering what materials are best for this (in vacuum). For example, if I make some holders of metal (e.g. aluminum or steel) I...

Hi, I did a PET scan and positioned a sample almost in the center of a moving carriage, taking measurements along the x-axis and measuring the counts. Each measurement took 60 seconds, and I took a total of 27 measurements. Here are my results As the display was in mm, I always assumed an...

I am picking up on an old thread having revisited the associated experiment. https://www.physicsforums.com/threads/reaction-of-potassium-permanganate-and-hydrogen-peroxide-solution.992713/ 10ml of Permanganate solution (0.0135 mol/liter) were reacted with 10ml of Peroxide and 10ml of vinegar...

I was tryingt to find away to build a setup for conducting the quantum erase experiment, demonstrating the observer effect. It seemed impossible without expensive equipment for sending single photont and detecting single photons, then however I bumbed into this guide from scientific american...

Hi, I have completed an experiment at university as part of my internship and have now received several measurement results which I would like to analyze statistically and plot the results as a normal distribution in Mathematica. Is this even possible with Mathematica? Unfortunately, I haven't...

Hey guys, I'll try to be as direct as possible. So for school i'm doing an experiment at home trying to find out if the diameter of a pot affects the time it takes to boil water inside the pot as it says in the title. I had three different pots with three different diameters. I got half a liter...

Rather than adding to this already long thread, I chose to start a new thread. Thought Experiment In this post, s is distance, t1, is the time of transmission, t2 is the time of reflection and t3 is the time of reception. All cases assume an orthogonal coordinate system. Case 1: From a God's...

Background I was reading a paper, Delayed Choice Experiments and the Bohm Approach by Basil Hiley and Robert Callaghan. The Wheeler's Delayed Choice experiment was explained in a way that was very easy to understand. An interesting point in this paper is that when a Mach–Zehnder interferometer...

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Hello, I invite you to watch this video. This is a simple experiment, which has never been carried out and which proves that momentum can undergo a 'repartition'... The Beauty of Momentum What do you think of this phenomenon ? What conclusion can we draw from this? Thanks a lot for your answers.

Hello ! According to what I have read on the internet, the weight of a body varies with temperature, its mass remaining unchanged according to the theory of relativity. My question is what experiment is done to corroborate that the weight of a body increases with the increase in its...

The SEW Experiment, named after its authors, Marian 0. Scully, Berthold-Georg Englert &Herbert Walther, was published in 1991 under the title, "Quantum optical tests of complementarity," and can be found here: https://www.nature.com/articles/351111a0.pdf They built atom interferometers with...

Consider a simple quantum eraser setup using polarizers: An incident beam polarized at 45º is sent towards a double slit. After slit A there is a horizontal polarizer and after slit B there is a vertical polarizer. At the back screen, if we run this experiment, we will see a particle pattern and...

Hi there, I have done an experiment measuring the voltage across the terminals of a dc motor, whilst running and then by holding it with my fingers to stop it. Done as demo for my high school class. The voltage reading was higher when the motor was running, which was against my expectations as...

The question and my attempt at a solution are attached. Thanks.

I'd like to ask about an experiment on atmospheric pressure. To conduct the experiment, we need an empty PET bottle and make a small cut on the lower part of the bottle. A cut no greater than one-half the circumference is acceptable. Then, we press a table tennis ball against the cut to open the...

Hello guys, [FONT=arial]I am currently running an experiment in my hobby room: I want to heat a cube in a microwave and then measure the surface temperature. Unfortunately, it takes about 20 seconds, so the cube cools down during this time which means I don't measure the actual temperature...

So as you can see in the image, I have noted the time in the [time column (s) ] on the table after conducting the experiment at home using the application phyphox. And now, I have some questions to fill in the remaining gaps: The first question: about ΔH (m) : Should I set it equal to zero...

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My teacher asked me to find the separation of a double slit by finding the distance between fringes. I wonder how I can reduce the experiment error. So what can I do?

Hello. I would like to design an experiment where different sled designs are compared. Specifically, I would like to asses how sled design affects the amount of force required to pull a sled over 100 meters. Any suggestions you might have would be greatly appreciated.

I have been reading about Magnetohydrodynamics and would like a bit of insight from anyone who has any knowledge on the subject. If I understand correctly when a conductive fluid is in motion it produces an electric field, and motion can be generated using a few methods one of which is a...

I have repeated the experiment several times and it always shows my longer length has the fastest flow rate. the same results occur when I apply 300mmH pressure to the fluid bag on top, the flow rate is still faster in the longer pipe

I'd like to perform an experiment that will build intuition for Special Relativity in the real world. While I do believe that it occurs in the real world, I'd like to be able to prove it for myself, and I feel that such an experiment would help others on this forum as well. Is there an...

In this video... https://www.physicsforums.com/media/magic-magnetic-balls-defy-physics.6951/ ... a pair of magnetic balls in two vertical tubes, roll upwards when the tubes are rotated, irrespective of the direction you rotate them in. A couple of questions... [1] Say the tubes are mounted...

Hi everyone, let me propose an experiment to see if you agree with my points. There is a 1cm2 1-micron thick aluminum substrate with a matrix of 100x100 nano-holes each with 100x100nanometers cross section separated by 100nanometers. Then, we focus a 1W laser with visible wavelength: 1-...

I want to construct an experiment similar to that described by Einstein in his thought experiment: https://en.wikisource.org/wiki/Relativity:_The_Special_and_General_Theory/Part_I#Section_9_-_The_Relativity_of_Simultaneity How would I design it to ensure the light from the flashes at the back...