Experiment Definition and 1000 Threads

I am trying to get an idea of an experiment that deal with the equilibrium of Chromate and Dichromate with acidity being the independent, but I am not sure in what situation would a equilibrium between these two chemicals occur. Beside the interchange of these two anions with each other, I was...

What would be the best, cheapest way to generate steam intended for introduction to a device for testing? I would use a standard American 110v three-prong outlet as a power source for the steam generator. All I really need is a steam source with an absolute pressure of 2 atm/202650 Pa/29.39...

For an electron can I not do the following to determine both the position and momentum? I take a screen with a small hole and I eventually make the hole smaller and smaller. Cathode rays emitted will hence get diffracted after passing through the hole making momentum more and more uncertain...

So here it goes: 2 points in space A & B. 1 superluminal object (fixed at 10c, no acceleration) that periodically transmits photons as soon as it starts moving. 1 observer with a very high accuracy photon counter removed a sufficiently large distance from the 2 points for light to take a small...

I am doing some experimentation, for a science fair. And I want to make sure I the laser pointer I use is Class I (conceivably, I may change that, but any class of laser can be used to replicate results similar to the double slit experiment correct?). Can anyone direct me as to where I may be...

Homework Statement A thin flake of mica (n=1.58) is used to cover one slit of a double-slit arrangement.The central point on the screen is occupied by the 7th brigth fringe.If lamda = 550nm, what is the thickness of the mica? Homework Equations path difference d=(n-1)*thickness d=7*lamda...

Although I have not been thinking very much about actual physics for while now I suddenly got the urge to read a little bit about it and I decided to start by checking out the birth of quantum mechanics again. In the book quantum theory by Bohm in chapter 1 the ultra-violet catastrophe and its...

Homework Statement Hello, In a lab experiment, we wanted to compare the time constant in a simple RC circuit by comparing the value of Resistance * Capacitance that we measure directly and the value of RC that we get from the procedure. The procedure entailed using a wave generator and an...

Coulomb experiment torsion balance. I know that electrical force is inversely to the square of the separation r ...My question is why we take r square? why we need square? And another question, why Q1Q2(multiplication of charges) is proportional to electrical force? (why we need to multiply...

Here is a trick performed very elegantly. This trick is a bit natural looking also, as the volunteer's guess is correct but not a perfect one. What phenomena is really going on here?

Homework Statement In 2011, researchers at the OPERA experiment thought they had seen neutrinos with mass m and energy E = 28 GeV moving faster than light. The baseline between the source and the detector was 731 km, and the neutrinos seemed to arrive 60.7 ns early, compared to the maximum...

The following assessment of a Bell experiment is based on N. David Mermin's example and is intended for persons with very little understanding of mathematics and physics (myself included). Assumptions (A1) A source emits a pair of particles with some opposite pieces of information. (A2) The...

I've built a rod 186K miles long, of ultra-light, ultra-rigid material. I am on one end of the rod, and an observer is at the other end (we're both in the near vacuum of space). I want to send a signal to the observer on the other end of the rod signaling whether the Packers have won the...

Hello, All! I'm writing a bit of fiction, and as a newcomer to the world of Quantum Physics, I thought I'd clarify a few concepts here, to avoid lapsing into technobabble. I'm trying to make something along the lines of the film Primer, which tries to incorporate as much realism as possible...

What are some interesting experiments for doing research in thermal physics or thermodynamics?

I was watching a video about the double slit experiment because I found it interesting, However, watching this vid raised more questions than it did answer. I would like to know why did the outcomes of the experiment only change when we observed it... wasn't the electron interacting with...

As opposed to discrete values, given that the energy levels are discrete. The gas in mind here is helium. When studying the peaks a plot of accelerating voltage vs current that match up to the energy levels they should be discrete, right?

"Describe an experiment that could be carried out in order to measure the terminal velocity of an object falling under gravity. Include any equations you would use or calculations you would make." The only formula I can think of is F=ma, but I don't see how that is relevent. My train of...

Homework Statement We recently did an experiment in class and we were asked to get some ideas together to try and explain our results. We measured the time it took water to fall from 70 degrees to 65 degrees C. The water was placed in a shiny steel container (which had a volume of about 400ml)...

Hi, PF! I recently solved a problem from BSL which asked to analyze the following system used for determining the diffusivity of a binary mixture of gases. The left portion of the system, from the left bulb up to the stopcock at the middle of the tube, is filled with gas A. The right portion...

Homework Statement Investigate the effect of the pulling force on average velocity. You will be given a trolley and a ramp and slotted masses to create pulling force. Homework Equations F=ma Average velocity = d/t The Attempt at a SolutionMy hypothesis is that as we increase the pulling...

Standard slit lamp experiment with detectors at the slits turned on. This creates two beams without an interference pattern at the screen. Now, impose a second pair of slits (without detectors) in the path of one of the beams. What will be the pattern on the screen? I'm confident this has...

I am not sure if this is the correct place to put this question, as it is rather straight forward. But anyway, does anyone know if/where I could find a scanned (or otherwise copied) copy of Young's original experiment (or his paper(s) on it)? I am doing a project, that amounts to some...

Reading the recent Insight series on Block Universe, Blockworld and its Foundational implications Part 5, the second paragraph talks about an experiment where a photon detected earlier is affected by the position of a detector far away: First, let me round the focal length of the lens to 1...

Homework Statement That is the set up for experiment, and I attached the data I found in the lab. The lab given me the equation to find the moment of inertia of the cylinder Homework Equations Icyl = (2hgM_cylinder) * (1/(W_withcylinder)^2 - 1/(W_nocylinder)^2) The height is 0.9m The Attempt at...

I have a question that might be very basic. The Franck-Hertz experiment shows that as the voltage (KE of the electrons) increase, the current/energy of the electron increases up to 4.9v at which point it drops due to the non elastic collision. this happens at intervals of 4.9v. assume that the...

Hi, we did this experiment as an introduction to pressure where you stand a candle on top of a small puddle of water on the bottom of a plate. You then put a glass jar over it and when the candle burns out the water level goes up inside the jar. I found this which shows the experiment if I...

Context: I'm an artist working with a writer on a superhero comic. One of the characters we were thinking of adding is a person with electricity powers. However, the writer wants the electricity powers to be somewhat more "realistic" (at least, aside from the whole electric super-powered human...

[mod note: post moved into homework forum, so template is absent] G'day, I have an open ended investigation to do for school, and was wanting to do an experiment involving the motion of water from a hose, as this would give me a good parabolic curve to view. I wish to examine two independant...

Hi I want to create a thought experiment involving waves of any kind. I am going to create a thought experiment I am on a boat that is at rest in the ocean. I am standing on the boat measuring the size of the waves and the frequency. So I measure the wave along the side of my boat to have a...

I did an experiment about interference of light when it passes two slits. I got datas and made chart, but I'm confused which result value I need to use whether % discrepancy or standard deviation. My data's & discrepancy is around 7, and difference between theoretical value and experiment value...

Homework Statement [/B] Plan an investigation to evaluate wind power as an energy source with equipment: • model wind turbine • multimeter to measure the voltage generated • anemometer to measure wind speed • hair dryer to generate wind power, set on cold • metre rule to measure...

Sorry that I haven't done a search here, but I've searched exhaustively on the internet for a definitive answer, but I watched the Dr. Quantum video on the double-slit experiment, and he says near the end that "The observer collapsed the wave function simply by observing" with an eyeball on a...

Pretty obvious that measuring at the double slits neutralizes whatever action or reaction is creating the wave pattern. But why the quantum leap to assuming superposition? What other configurations have been tested or were there just slits used? What about a round hole or holes, an “X” slit or...

If I were to replicate this experiment http://arxiv.org/pdf/1505.04254v1.pdf but was limited to the purchase of only one laser which frequency and what power should I choose? I know the research team that conducted this experiment purchased their lasers from jetlasers.org but they unfortunately...

I've been reading about this but I couldn't find a conclusive answer. I have to measure the spring constant (k) using a vertical spring-mass (M) configuration and using two different methods: - static method: I calculate elongation vs weight and find a linear fit of the data (the slope is K) -...

Homework Statement I collected data for an experiment involving air resistance. We made paper disks and timed how long they took to fall over a fixed distance. We changed the radius of the disk. We found that as you increase the radius they take longer to fall. I am trying to explain my results...

I want to be able to tip a can by building a device that fits inside the can and is able to tip it even when the can is completely closed. I have a motor and an arduino to control it. Would I be able to tip it by spinning a weight around the vertical axis of the can? Or would action and...

Hi all, I am currently operating a piece of equipment that essentially collects particles and separates them based on their size. Essentially you have 8 stages, and each stage has a differing size of particles it collects. For example: Stage----Size of Particles (D) (um)-----Mass Collected (M)...

Homework Statement My task is to plan and carry out experiments which show that the resistance of a conductor is proportional to the conductor's length. I have access to the following equipment: http://imgur.com/a/GuqUX Amperemeter, voltmeter, electricity, ruler som other werid things and...

Hi, so, I have this AI creation I want to make, which, like some experiments i.e. the LHC/ect it is either too big, too nano, too much, too code-wanting, to make, and I can't and won't be making my AI invention, or more precisely, I won't be coding it up or connecting the camera gizmos ect...

Homework Statement 2. The attempt at a solution I thought because they are negatively charged and so they will get attracted to the positive nucleus, and also because they are too small, but they are not acceptable. The answer is that they have a range of energies / they are deviated by...

< Mentor Note -- thread moved to HH from the technical forums, so no HH Template is shown > experiment for testing type of catalyst on reaction rate? I need an experiment (just the method) Where I can test the reaction rate of changing the catalyst type I need about 3 differnet catalysts e.g...

Hey guys the Idea of simulating the DSE with a program caught my interest but I just had a few questions regarding the DSE Is there a function that models the probability of finding an electron at a certain point ONCE It's BEEN FIRED FROM AN ELECTRON GUN? like an amplitude function squared or...

Homework Statement I did an experiment where I dropped a ball beneath a motion sensor and it recorded the vertical components of position vs time, velocity vs time, and acceleration vs time. The question asks to determine the change in the ball's linear momentum (per until mass) during the 5...

I am pretty familiar with the theories of special and general relativity. I know how to add velocities, I know the main postulates and the experimental confirmation. However, I thought of the following thought experiment: There are 3 experimenters (at the same point in space), who adjust their...

Homework Statement I'm doing the lab report questions for the centripetal force experiment using this apparatus: ftp://ftp.pasco.com/Support/Documents/english/ME/ME-8088/012-08478B.pdf. One of the lab questions asks whether using a larger "free mass" reduces the percentage error. Homework...

In his book, Theoretical Concepts in Physics, Malcolm Longair describes two experiments that Joule performed involving gas expansion (the discussion starts on pg. 217). In both experiments, there is a chamber containing gas, labeled A, and a chamber that is evacuated, labeled B. There is also a...

Imagine that one has a single photon of 632nm. It enters the back end of an open-ended HeNe laser tube - one with no mirrors - and along its path, causes the emission of another photon. According to the wikipedia entry on stimulated emission (https://en.wikipedia.org/wiki/Stimulated_emission)...

I understand the experiment and the trigonometry involved except for one statement. Why is BP-AP=BD in this diagram http://www.citycollegiate.com/interference2.htm How do you know this/ work it out. Many thanks