Lab Definition and 1000 Threads

I have been given the masses of 5 cups, each with a different amount of screws inside. I am asked to find the mass of a single screw. The cups themselves are all equal in mass and the screws are all equal in mass as well. I subtracted all the cups from each other to get a bunch of numbers...

Homework Statement I'm doing a lab, and I plotted a graph for the refractive index I got about 38.3 degrees and the material I'm working with is a glass block from reading two textbooks I came to the conclusion my graph might be wrong =/, because the critical angle for glass in air is...

I have been given the masses of 5 cups, each with a different amount of screws inside. I am asked to find the mass of a single screw. The cups themselves are all equal in mass and the screws are all equal in mass as well. I know you are supposed to subtract the cups from each other to...

The tevatron was shut september 30, 2011 at Fermilab National Laboratory. Basically the particle research is now done in CERN instead. This is bad news because I was planning to do an internship there for high energy physics. Does this mean that I shouldn't be applying for high energy physics...

Homework Statement So in lab, we had this setup where we had a string, two masses, and a tube. We attached one of the masses, then put the string through the tube, and attached the other mass on the other end. Then, by holding the tube, we were to spin a mass above our heads and time how...

Homework Statement A 15 kg block is against, but not attached to, a spring w/ k=150 N/m and pushed back a distance of .75 m. All of this is on an incline of 25 degrees, w/ coefficient of kinetic friction equal to .4. To top it off, there's a string pulling w/ a Tension of 20 N at an angle of 10...

Homework Statement Hey guys, I'm having a problem with my lab report write-up. The purpose of the lab is to find the value of g which should be around 9.8 m/s^2. This was found by releasing a cart from rest on an inclined plane and measuring the time it took to travel across a certain...

Homework Statement Hi there, I am asked this question in one of my lab calculation questions: Calculate the number of moles of I2 produced from 25 mL of the diluted KIO3 solution. Information that has already been obtained from my lab: -Molar concentration of dilute KIO3: 0.00241 + or -...

In a static equililibrium lab, what are some reasons why the sums of the forces and/or torques may not be equal to zero. The forces in N are very close to zero (as my professor said they should be) and the torques in N-cm are not anywhere close to zero. I know the torques are greater than their...

Homework Statement 1.The primary standard in thiss experiment is ammonium iron(II) sulphate hexahydrate, (NH4)2Fe(SO4)2*6H2O. Calculate the number of millimoles of ammonium iron(II) sulphate hexahydrate in a 1.0000g sample. 2.Give the balanced equation for oxidation of iron(II) ion by...

Okay, so we did a lab in class with Na2CO3 in BaCl2 first. The reaction formed a white precipitate, and I suppose the products are BaCO3 + 2NaCl. Not sure if NaCl is dissolved or not, or if it was the white precipitate I saw, but anyways, here's my question... We added HNO3 to that new...

Homework Statement We did a lab, where, in the first part we timed the period of a pendulum with varying lengths. In the second part, we timed the period of a pendulum with varying masses. I got the results that I expected to get. However, I do not understand two of the lab questions...

Hi what type of calculation errors should i do for my data on the capacitance discharge experiment. I had a voltage of 1.5V ,and I know the resistance, so the aim was to obtain the value of the capacitor, using the time constant RC=t formula. I done 4 trials , with the same voltage, (...

Hi All, I am a real noob with physics...not my best topic. Trying to do the best I can. Just want to run my noob logic past some people much better at physics than me. We did a lab in class and I think I have the correct answers but just want some confirmation. Homework Statement We...

Homework Statement given the specific heat of water is 1.00 cal/(g*Celsius), what is the specific heat in Joules/(kg*Kelvin) Homework Equations I realize that this is simply a conversion factor issue but I have NO IDEA how to even start it.. The Attempt at a Solution I know the...

Homework Statement So i have to do a lab about circular motion we had to swing a rubber stopper around while holding a glass tube and when there was a mass hanging at the end of it "plot a graph so the slope of the straight line graph may be used to determine the mass of the stopper" we...

what would be some sources of error in a lab to find the refractive index of a prism? This lab was done by use of optical pins and glass prism.

Homework Statement In a lab experiment in my introductory physics class, we are asked to verify Newton's Second Law by taking data from an experiment and then comparing that data to a theory. We are given a cart of unknown mass m_{}1 is put on a horizontal track with a string attached over a...

Homework Statement I'm doing Millikan's oil drop experiment in a lab. I've got a set of measurements and all that, but in analysis of the data I can't seem to get values for the charges on individual drops that seem reasonable. I find that each drop is carrying between 10 and 300 elementary...

Hello, I am currently trying to come up with an idea for a project for my advanced physics lab. I have thought to do supercooling/heating, superfluids, and perhaps a rail gun. I have access to a very nice high-speed camera, so I would hope to find an experiment that will utilize it (the rail...

Best way to graphically draw vectors for lab report?? Homework Statement I've been feverishly trying to get my vectors drawn professionally for my lab report. The idea is that I need to find out the vector addition of two vectors graphically. The whole lab report is expected to be as...

1. What is the equation that defines momentum? 2. Using the equation for momentum, derive the SI units of momentum. Hint: In this Information Age, it should be easy to check your answer. 3. What is meant by an elastic collision? 4. What is meant by an inelastic collision? 5. What happens for...

Either through gamma decay into electron-positron pairs or straight old beta emission?

Homework Statement In a lab I collected data for change in apparent weight of a ~1kg mass during an elevator ride. The mass was suspended from the scale by doubled up rubber bands. This caused plenty of oscillations in the data. Can i apply the form mx"(t)+γx(t)+kx(t)=Fcosωt to this situation...

jk, ignore this.

Homework Statement I am trying to calculate the (Vo) for a ramp length from a horizontal decline marked at 20 cm. The ramp on top of a table has an angle of 41 degrees. I performed 3 trials releasing a ball bearing at the 20cm mark and averaged 53.3 . The table height is 87.3 cm. Isn't Vo...

Hi guys, I was doing my lab report and stumbled onto this question and I would really appreciate it if you guys could assist me on this. (: Homework Statement For a simple pendulum consisting of a mass M attached to a very thin light string of length L, in the absence of air resistance...

Homework Statement Using your understanding of projectile motion along with some background research on video analysis, devise a way to find the initial velocity of the tennis ball in the video just as it enters the bottom left of the screen. There is some important information for you to...

Homework Statement The object of the lab is to find the diameter of the bouncing ball shown in the pdf attached. We are working with Logger Pro. The only 2 pieces of information that we have is that the ball is on the surface of the earth, where Ay=-9.81 m/s2, and that the frames are 0.05...

I'm need some help understanding my lab concerning the muon. I'm trying to find information about the lab but I'm not find anything. I just would like to know the following:- 1.Does changing the saturated amp output change the timing of the FPGA? Does it and how? 2.What are the...

I have a lab report due a week from now. I want to go above and beyond of what is required of my class and to make it as professional as possible. This is to help me prepare for my future lab reports. I will be using word processor for equations and tables to the best of my ability. Would it...

The title really says it all.

I need to design a procedure for this lab. I measured the mass of a couple of bags containing the same object in random amounts. Without looking at how many objects are in the bag i have to determine the mass of one object. At first i thought that since each mass measured should be a...

Homework Statement For a lab in Physics C, we're supposed to find the muzzle and impact velocity of a dart gun. We found x-distance, y-distance, and angle fired at, however, we were not allowed time. Our teacher wants us to graph data that is important, but I don't see how a graph would be...

In my lab for physics we are given a ramp, some textbooks, and a marble. The objective of the lab is to make the marble go through two hoops (the hoops are about an inch and a half wide, the marble is about 3/4ths of an inch). Our teacher is going to give us either a specific distance from the...

Homework Statement Suppose that a quadratic fit to a position plot yields the following fit result: y=4.97x^2+1.53x+.0503, how would I determine the accelearation due to gravity? Homework Equations I know that y=1/2gt^2+Vnaught(t)+ynaught. I know that g is 9.87m/s^2. So in my...

I did a lab earlier this week on Newton's second law with a pulley and carts. M2 was the block that traveled horizontally and M1 was the hanging mass. The mass of the cart that was moving horizontally was constant all experiment with about 0.2 kg. The mass of the hanging gradually increased...

Hello all I want to buy few equipment. I want to set up my lab and start developing AC/DC converters. I have few years of experience but as I have worked in large company I don't know which is the cheap substitute for following equipment. I would like to have 1) A power Supply- I have...

I have to conduct a lab concerning inverters. I'm using a 7404 hex inverter IC, 6 LED's with 150Ω resisters, and 1 logic switch. Can someone tone it down a little bit so I can undersetand what the lab is wanting me to do? And what does the image on the second page show (Figure 3-7 and 3-8)...

Homework Statement This is more of a general question but it is part of my physics course so i decided to post here, I am sure many of you have done this lab but what it is is a cart with tickertape attached to it going down a ramp, once we plot a d-t graph there are lots of application...

I have looked everywhere to find a simple, easy test to find whether a wave is longitudinal or transverse, I've read my textbook and I think it may be to do with polarisation but I am not quite sure how, or someone said that passing the wave through a vacuum would determine the type of wave. any...

I'm an astronomy teacher on a very tight budget. Before I really get into the meat of astronomical information, I want to make sure that my students have some understanding of WHY it is that we know what we do about astronomical bodies, and that means getting them to work with some of the tools...

This online chemistry lab won't accept my answer, WHY? Homework Statement Ok, I'm doing this lab, and it won't accept my answers. I can garuntee you that they're correct. Maybe I'm typing them in wrong? I've missed soo many attempts, I look at what the system says, but it says the answer is...

I'm curious if I'm doing this chemistry lab correctly or not. If you open the link below, you can see the lab. Basically, my job right now is to write a well formulated procedure on how to perform this lab. So, for this lab, am I supposed to be calculating the mass of the substance (h2o in...

So I'm still in the process of deciding my schedule for this semester. So far I know I'm taking: Introductory E&M Classical Mechanics (junior level) Advanced Linear Algebra Introductory Differential Geometry. I need a fifth course but can't decide which one to do this semester. I'm...

I am in the process of building a small furnace aimed at technical ceramics work, and I would like to use a carbon crucible. The carbon crucible's limit temperature is ~ 430 C in an oxidizing atmosphere and ~ 2800 C in a neutral atmosphere. My plans are to have the furnace vent to atmosphere so...

Dear all, In this coming fall, I will be assigned Physics Lab as a teaching assistantship. Does anyone know a book or any other resource that can help me in mastering physics lab challenges. I need a book on measurements and instrumentation where i can find data manipulation techniques. Does...

I've seen some threads on PF discussing the labs in physics, engineering, and chem, and something just seems.. off. People are talking about how their lab reports are ten or twenty pages long, handwritten, and/or take many many hours. This doesn't seem to jive with my own lab experience. I...

I'm an undergraduate physics student at an european university. I just finished my first year. I really enjoyed all the courses I took, except for a lab class (the only I had) in which I don't think I learned much. I have an option to get involved in math or lab research; not both since I don't...

Homework Statement To examine a particular blood sample in biology lab, a student uses a compound microscope set to have a magnification of -4530. The objective and eyepiece are both attached to a tube which is 18 cm in length and the eyepiece has a focal length of 2.62 cm. The near point of...