Lab Definition and 1000 Threads

Hello! In my summer lab, me and my labmates are trying to generate entangled photon pairs using a spontaneous parametric down-conversion (SPDC) entanglement source with BBO crystals. We're using a 405 nm diode laser from Matchbox with model number 405L-21A. Our setup is as follows: we shine the...

If this is the wrong forum please move to the correct one. I am new to geological science and work for a small geotechnical firm. I am the only lab tech the place has and have basically only been doing soil compaction, and expansion test for 2 years. There was a senior lab tech that knew the...

I'm an old (74) yr old retired ASCP lab tech and Stockbroker/CFP. Now functioning as a local township trustee. I won't be that common of a visitor, just when something is different.

Hi I am doing a physics investigation on the research question "If the string length changes (same tension) does the spread and amplitude of harmonics change?". If I'm not mistaken, plucking energy should be a control variable. So, I want the energy of my plucks to remain consistent (through...

I found a box of air core solenoids and was hoping someone could me think of a useful lab to use them for. They are about 700 turns each. They carry 7 to 10 amps. However I think I think I would only be able to provide 3 amps because of the power supplies I have. I would like to use them to do...

What is the cost of lab experiments? I do understand that it depends, but let's say it's the cost of experiments conducted in a western country involving 1) strong magnetic fields; 2) plasma. Also, can one find price lists for such things online? Thanks.

Short satire piece: https://www.mcsweeneys.net/articles/signs-you-work-in-the-cool-lab

Hello All : in the near future i will have few interviews as lab assistance and lab apprenticeship , mainly physics labs , do anyone have a source on lab devices to review before the interviews ? maybe i won't be able to find all my old books or internet links Best Regards Hagop Bulbulian

Synthetic biology is a rapidly growing field of science that aims at redesigning organisms for medical and agricultural applications, by means of biotechnology, genetic engineering, molecular biology and other methods by chemical, biological or computer engineering. As far as I understand it...

how do I calculate static and dynamic pressure for the wind tunnel lab report, drag force, and lift force? Please, anyone? thank you.

I'm trying to prepare a slideshow presentation of some lab-work we've undertaken. It's to be around 15 minutes in length and comprise of a few different (but related) experiments. I would like to ask if anybody knows of one or a few "exemplary" experimental physics presentations (on YouTube...

I need some help understanding the LC/MS process for proteomics. I am writing a paper on using LC/MS to detect nut allergens in food. My problem is that I have never used LC or MS so I do not understand the process in the lab. The resources I have found are too complicated. I am a 3rd year...

Firstly, I don't expect there to a single good answer to this question. I've done some googling and it seems there are multiple options, but I am still interested in suggestions and/or what your experiences are. We started using GIT (GITLab) a couple of years ago and it works well when we are...

I was looking for a way to calculate the friction arising from the axle and wheel of a standard lab cart. I came across this research paper: https://www.usna.edu/Users/physics/mungan/_files/documents/Publications/PhysEd4.pdf That derived the following equation for the coefficient of rolling...

Please see attached image. This was a lab performed where a puck hit a wall shown on the page, the difficulty I’ve had is being able to see when and for how long the puck hit the wall as it is needed to find the average force in the system. Each dot on the page is 30milliseconds apart.

I was wondering if it is of any value for someone interested in physics/Biophysics grad school and a Biophysics career to be working in a biology lab? I'm an undergraduate physics major concentrating in biophysics in the US and I have an offer to work in a cancer biology lab. It's very much...

[Mentor Note -- Thread moved from the technical forums, so no Homework Template is shown] Hi all, Recently I 'did' (a virtual lab) a drag laboraty experiment that used a wind tunnel to measure drag coefficient of 3 different shapes (cylinder, airfoil, triangular prism) and I'm not convinced...

I am doing an Atwood Simulation lab. I am having trouble with this part of my lab that ask the question provided. I can tell that the relationship is linear and that as the mass increases at a constant rate the acceleration increases. Logger pro tells me that the slope is 31.43. I am having...

I attempted to run a lab that would allows us to calculate the magnetic field strength of a couple different neodymium magnets. I would love some feedback on it and ways that I could potentially make it better. The numbers I calculated were very far off from what I expected. Apparatus set up: I...

I arranged the masses in ascending order: 11.0 g 11.1 g 20.6 g 21.4 g 21.5 g 25.7 g 25.8 g 25.9 g 31.6 g 31.9 g I found the average mass of the marbles: 22.65 g I found the difference in masses of the marbles: 0.1 g 9.5 g 0.8 g 0.1 g 4.2 g 0.1 g 0.1 g 5.7 g 0.3 g I found the average of the...

I'm looking at Schutz 7.4 where first he obtains the following expression for a geodesic: $$ m \frac {dp_\beta} {d\tau} = \frac 1 2 g_{\nu\alpha,\beta } p^\nu p^\alpha $$ This means that if all the components of ##g_{\nu\alpha }## are constant for a given ##\beta##, then ##p_\beta## is also...

Hi, New to the forum here! I'm teaching age 16-18 physics in the UK. I was wondering if anyone in here might have experience using equipment that looks like this: https://www.eiscolabs.com/products/alpha-scattering It's a physical analogue of Rutherford's famous experiment: roll ball bearings...

Welcome to PF! I'm an HVAC engineer and I actually gave a talk/round-table with the founder of your organization a few years ago: https://www.westchesterbiotechproject.org/innovation-in-research-2017 One factoid I give on labs that speaks to what people know is that a single 8' constant volume...

So for the first one on the left is it T= 2g*20=40Nm ? Our professor said it is clockwise I just don't understand how she gets that conclusion.

Ok so I am an 8th-grader in Pakistan and I am highly interested in chemistry. I am also thinking about majoring in chemistry for 9th-grade. I watched some of NileReds videos about some chemical experiments like the chemical traffic light (chemical oxidization) and others. But I don't know where...

The answer learned in class is that the two 2*4s are able to distribute the load over both of them, but I don't think this is an actual answer because that's balanced by the fact that each block is half the area. Does anyone know of the reason for this observation? Thanks!

i have attached my attempt above i have sent it to my teacher and he said i should fix the mistakes and resend it

I was wondering if someone has any experience of using a "large-scale" ELN system for experimental physics (mainly)? That is, ELNs that are used throughout an organisation to ensure compliance, proper handover etc Where I work there is now a discussion about buying a site-wide ELN to replace...

last week i did a chemistry lab. i mixed NaOH 0.03M with equal part of methyl violet and mesured aborbance in a spectrophotometer. then i did the same thing with a 0.05M and methyl violet i did today the graphs and got the k' =-0.1647 for the first solution and k'=-0.4022 for the second...

Hi, I have measured a set of V-I values, and I have to provide the value of the resistance. I have used ac and dc current. The circuit was quite simple: power supply -> ammeter -> resistance -> [power supply] wave generator -> ammeter -> resistance -> [wave generator] Voltage was measured...

Look, this is a weird one, but I really need help. This is the Electronics Laboratory, that is supposed to be hands-on, but with Corona it got cancelled. However, they announced that we'd do it through the internet, had us download PSPice, and now we basically have to try and "translate" the...

So basically what I had to do was: 1. take a Allen wrench and let it come in contact with an iron nail. Nothing happened here. None of the objects are magnetic. 2. take the Allen wrench and let it touch the North end of a magnet. Then let the wrench come in Contact with the iron nail. Here the...

So guys I had physics lab where we used Steam Generator, Pasco interface and Capstone. In a nutshell there is graph attached below and formula, please write the solution with this formula.

This is how I think the set up of the lab should look like. I've decided the height to be y=1,5m. The length x is assumed to be 0.32m. where Voy =0m/s the time it takes for the marble to drop 1,5m is 0,55s the inital velocity of the marble is around 0,47m/s I Think I have the...

Hello, Currently I am an undergrad about 1 year or 3/2 year(s) away from graduating with a double major in computer science (which I am a lot stronger in) and physics. I have always been interested in advanced propulsion. I would really like to do research on the...

Any recommendations for a take-home physics lab kit? It's for a intro algebra-based physics course for non-scientists/non-engineers. There seem to be a few companies out there selling these kits, and I'm looking for feedback. They don't need to be super-fancy, but they need to be better than...

One of my novel's leads is a physics student. In the following lab: what would students learn about waves? What kind of measurement results would they get (not specific numbers, but, for instance, proportions of node lengths to rope lengths)?

In the file I present below,it shows a way to calculate luminosity in boost frame when crossing angle exists.I can't understand why luminosity calculation is done in boost frame instead of lab frame where calculations are much easier.I also have difficulty understanding lab frame,accelerator...

Hello, so I am working on a projectile motion lab but I'm not sure what to do right now. Essentially, the lab consisted of my classmates and I using an air table to show that the vertical and horizontal components of projectile motion are independent. During one of our trials, we placed a puck...

Hello everyone! In class, we made a lab. The lab was basically first measuring a mass. Then, we found a meter stick's center of mass by finding the point where the stick was balanced. After that, we hanged the mass and changed the fulcrum point. We balanced it again and the torque equation gave...

Will finish B.S. in molecular biology in May. Have found asking vague questions about where to go/apply to next are pretty unhelpful. I believe that going through indexes of interesting research is the closest I can get to finding a place to advance myself and be happy in. here is an example...

Good Day Hi all, I am doing a project with the standard lab about measuring equipotential surfaces with conductive paper, a voltmeter, and a power supply. I have a couple of questions about this project. I attach a jpeg of the equations for voltage calculations in the file “Equations.jpeg”...

I have measurements of period time and distances that's all: T (sec) D (m) 0.9 0.008 0.91 0.009 0.97 0.01 0.98 0.011 1.06 0.012 I thought about adding the magnetic force like: T=2π*√l/(g+x) but have no clue how to integrate the distance there, I don't know even how to start...

Bounce 1, Trial 1-4: ha (height after bounce) (0.74+0.67+0.69+0.73)/4=0,7075 this is my mean value. Standard Deviation, s: 0.033040379335998 (calculated the value using an online standard deviation calculator) Sample size N: 4 sx̄ = s/√N = 0.033040379335998/√4≈ 0.0165 At a 95% confidence...

a=m2g-m1gsinø-m1gcosøu/m1+m2

When I ask Google how to expand space, I get suggestions on removing junk or questions on what it is expanding in to. I am going to try asking here and I know I must phrase the issue properly. It is agreed that many scientists claim that space expanded around the time the universe began. I...

Homework Statement: Physics Lab Propagation of Error Issue Homework Equations: ∂f/∂b=∂/∂b (tan^(-1)⁡(a/4b))= 1/(1+(a/4b)^2 )×(-a)/(4b^2 )=1/(1+((5.922 cm)/(4×1.766 cm))^2 )×(-5.922 cm)/(4×(1.766 cm)^2 ) Hello, I'm trying to find the uncertainty in a function from the lab manual for the...

Hi everyone! I'm 30 y.o. Software Engineer from Ukraine. I have BS degree in Economics. For the lack of theoretical knowledge I decided to get a technical degree. My primary interests are Math and Computer Science. But I'd like to try more hands-on fields of natural sciences and engineering...

Problem Statement: so we did an experiment. basically the teacher gave us each a cube of unknown metal and we had to figure out what it was using the specific heat. we put the metal in boiling water until it was 212C and then we put it in room temp water and we measured how much it heated the...

O.K. here's the deal, a friend and I are taking a physics teaching methods course as an elective, as a part of the requirement we were asked to plan and execute (teach) a one hour lab on kinematics ( specifically ballistic movement), the Tracker program and error estimation. We decided on...