Lab Definition and 1000 Threads

Homework Statement So basically we allowed a cart to role down an incline plane and we recorded the results with a ticker taper. Now there are a couple of questions that my teacher asked that I do not fully understand. This entire section is a bit shady. I do not fully understand what...

We did a lab, where a cart was rolled down a ramp and a tickertape was attached to the cart as it rolled down. When the cart finished the course of rolling down, a line was drawn across the tape through every sixth dot to show that it is an interval of 0.10s. Then we had to make 3 graphs...

Graphs Of Acceleration And Force Hi! We did this lab...on Newton's Second Law. we are trying to prove the formula F=ma... Now i drew this graph of acceleration vs time and force vs time...they look similar..how can i interpretate them? someone help! MY lab is due tomorrow!

In a physics lab, a small cube slides down a frictionless incline as shown, and collides at the bottom (where it is now moving horizontally) with a cube that is only one-half its mass. If the incline is 30 CM high and the table is 90 CM off the floor. where does each cube land? the teacher...

Could someone please provide some assistance as to how to approach this problem. I am doing a thermochemistry lab: The second Virial coefficient of CO2 and I am not sure how to approach this problem. Just a few hints would really be appreciated. I have tried differentiation, integrals no luck...

Homework Statement How would you prepare a 500 ml lab stock of 20% (w/v) SDS That is all that is stated in the problem. Homework Equations I'm assuming for w/v the volume would be 0.5L but the weight I'm not sure. The Attempt at a Solution 0.5L x .20 = .1g SDS / .5 L .. is...

Hi there. I'm having issues with a high school lab that deals with acceleration of objects down inclined planes. At the top of my lab questions, there's a simple diagram (just a triangle with a rectangle on the hypotenuse, representing a cart), and one of the questions pertains to it: What is...

I was looking up möbius strips online, and naturally wandered into klein bottle territory, and ended up at http://www.kleinbottle.com/" . It's reading week, and I'm in the university's computer lab. Heaven protect me if an overworked English Major comes over and asks why I'm disturbing the...

I have decided to do a a cyanotype experiment for my chemistry investiagtory project, this year in school. To do that, I need Ammonium Ferric Citrate, which my school lab does not stock. Also, local retailers don't have it. How can i prepare ammonium ferric citrate in my laboratory using...

Homework Statement Explain what happened when the solution was added to water in terms of Le Chatelier's principle and ocument your explanation using observations. Think Carefully! write out the correct mass action expression before you answer--this is subtle! Homework Equations a...

Well I have this lab on electric field lab and what I did was measure the voltage from different distances on a parallel plate. So when I plotted the graph Voltae vs. Distance, I got a linear line and the equation was y = 85x (somewhat like that disregarding the y-intercept). My concern is what...

I work at a start company that is looking to separate the isomers of one of the compounds. any suggestions of good labs that can do this work? thanks for your help! isa

Homework Statement in practice is is assumed well insulated heat exchangers are adiabatic. With reference to this heat exchanger, carry out the necessary calculations and then give an opinion as to the validity of this assumption. Homework Equations Observation Thotin 55.88, Thotmid...

Analysis: What are the effects of various temperature, pH, alcohol, and saline solution treatments on peroxidase activity? What are the optional ranges of temperature and pH for peroxidase? Are alcohol and saline solution inhibitors or activators? Sate the dependent, independent and...

I have this practical problem in my laboratory and would like to see it formulated in a formal calculus way, but my math skills were never very high and they are very rusted now and do not know how to formulate (much less solve) the problem. A biological sample containing a virus is run...

Here is the problem I am having: Professor told me to find the spring constant using our slope of the graph. Now the graph that I did on the excel went something like this: On the X-axis of the graph was the weight of the hanging mass in Newtons and on the Y-axis of the graph was the...

Rub a balloon containing a few pieces of Styrofoam towards your sweater or a piece of wool/fur. What do you observe when you touch with your finger one of the piece through the balloon? Why does this happen? The Styrofoam repels within the balloon. You charge the balloon negative by rubbing...

Homework Statement Figure out the total distance traveled by a ball bouncing vertically when its dropped from a height of 6 ft above the ground and the time the ball was in motion for. G 32ft/s^2 ball one dropped from 72 inches bounced back up 53 inches with a Coefficient of...

A student takes 0.45kg of ice. The ice is initally at -23'C. She heats the sample in an oven until the temp is 134'C. a). What is the NRG needed to heat the ice to its melting point? b). What is the NRG needed to change the solid ice into liquid water? c). What is the NRG needed to heat the...

Hi, I am having a problem with my lab report and am hoping somebody can help me understand it better. Here is my problem: I set up a series circuit with 5 resistors of 427 ohms each. The voltage of the battery was 8.70V to start. Once the battery was removed from the circuit its...

We recently did an experiment in chem lab with titrations and we are supposed to find out the molarities of some unknown solutions. I thought that I was doing my calculations right, but the checking program that I am using keeps telling me that I am wrong. We made a standard solution that was...

[SOLVED] Chem Lab Help! My AP chem class did an experiment where we started with 0.500 grams of copper and we ended up with 0.525 grams of copper after the experiment. The experiment consisted of us sending copper through different reactions to observe the effects of a series of reactions on...

[SOLVED] BiOchem lab DNA electrophoresis 1) what is the the purpose of restriction endonucleases in prokaryotes? how do these organisms protect their DNA against the effects of their own restriction enzyme? 2)why is it important to use purified Dna samplesin restriction digest and gel...

1. A solid cylinder is being rolled down an incline, and we are looking for acceleration. I can find the observed value of acceleration fairly easily, but am not sure how to find the accepted one. Below are the instructions given on how we are supposed to find the accepted acceleration...

Hey everybody, I just completed a small distillation lab for my high school chemistry class. We took a sucrose/water solution, added yeast to ferment it, and distilled it into ethanol for about an hour in the lab. I'm trying to write my lab report, and I've hit a huge stumbling block! One of...

I am reading from the book, "Nuclear Reactor Theory", by Lamarsh. I have run across an idea that I am struggling to understand: It states that for a neutron that scatters elastically with a nucleus, the Energy in the Center of Mass (COM) frame of reference will always be slightly less than...

I have to do an egg drop lab (be able to drop an egg from 10m without it cracking) what should i use- toothpicks and glue for "controlled crushability". In other words, the egg would break the toothpicks when it lands so it would not crack. This sounds good but the problem is that the parameters...

My question is: Using the average [EDTA], find the weight% of Ca2+ in the unknown My attempt: so, the[EDTA] i found from standardizing was 0.005 M; I used 29.85mL to of EDTA to titrate my 25.00mL unknown and the weight of my unknown used was 0.2505 g this is what i did: [EDTA] =...

Ok, so I'm sure many of you have heard of this lab. The instructor hands out 9 unknown solutions, and it's your goal to label each. The names have been given to us a day before and we are allowed to research the elements. The list of elements include: BaCl[SIZE="1"]2...

Homework Statement Not really a problem, but an analysis question on a lab that I can't figure out. We did an experiment in which we placed a spring scale on a table and attached strings to both sides. The strings went over pulleys and we hung various masses from them. My question is what...

I have a lab report due tomorrow on forces. Basically, we were supposed to calculate the kinetic friction of a "frictionless" system on a level place, an incline plane accelerating upwards, and an incline plane accelerating downwards. I solved for mk by using the equation m(a[SIZE="1"]t +...

Homework Statement My results are coming out funny and I was wondering if I was doing something wrong. I have to find acceleration due to gravity. one of my values ... m2 (decending mass) = 60g m1(ascending mass)= 50g distance traveled= 95.3cm or .953m time traveled average=...

Homework Statement I have a lab to do in which we have a ramp set up on a table. We are rolling the ball down the ramp, and letting it roll of the table. We have to figure out where to place the cup for the ball to roll into. If we do not get the ball in the cup we fail. How can I do that...

Homework Statement I've got this lab I'm working on and I'm somewhat confused. We pushed a roller cart up an incline plane to determine acceleration and the such. Here is the graph. http://img231.imageshack.us/img231/7950/physicslabpicsh5.png Homework Equations The questions I have...

I attended a seminar today in which a new theory of dark energy was discussed. I'm not sure which forum to put this in, since it includes a lot from other fields, but since it is regarding dark energy, cosmology seems the best place. Here's a link to the paper...

Hello PF ;-). I am writing my first lab report as I type and I need some help with the formatting. It's not a big deal but I lean on the side of being a perfectionist. I have a section at the front of my report titled 'Raw Data' and the data we collected in the lab is there. The next section...

Hi! I believe a shipyard working on new ships, with all its electrical arc welding and stuff, makes for a lot of "stray" currents in the sea. Do you guys have any plausible idea to re-create such scenario in the lab? A small-scale model perhaps? Thanks a lot.

Hey, I did a lab yesterday, and I am working on the report right now, my problem is my teacher confused the hell out of me with what it is I need to have in the report. the experiment was this: We took a car and placed it on a track with a photo strip at the top, and sent it through a photo...

Homework Statement Okay, this lab has had me stumped for the last few hours. This is our first lab for AP Physics BC. Problem: Determine the position vector that describes the locatino of the water that is launched by a drinking fountain. Your position vector needs to be in unit vector...

I'm new here, so sorry if I post this incorrectly! =/ I've scanned the lab, and the pictures are below. Homework Statement Well, the problem statement is in the picture, I guess... and our givens are that change in X is .35 meters, change in Y is -.91 meters...

It seems that I've dropped the ball somewhat in preparing myself for a graduate degree in physics. This is my last year as an undergraduate and I have no research experience at all. I wasn't accepted to any of the summer REUs for which I applied (didn't apply to as many programs as I should...

First, here is the question: The percentage of two elements making up an alloy can be estimated from the following equations, which assume a simple mixing of the two components: Palloy=F1P1+F2P2 F1+F2=1 Here, F1 is the fraction of the alloy composed of element 1, and F2 is the fraction...

I am currently working on lab projects and I need some lab report samples (which include tittle page, abstract, intro, methods, results, discussion, conclusion, references ...). If anyone knows where to find those, please let me know. Also, if you have any tips for this, please post it here...

Hi, I am doing a lab report for superconductors, and yeah, we have to bake them in a furnace and test their properties and all that. I am trying to find a nice book, something like an all in one jumble where it talks about the history, the theoretical properties (such as the Meissner effect)...

Scientists funded by the European Space Agency have measured the gravitational equivalent of a magnetic field for the first time in a laboratory. Under certain special conditions the effect is much larger than expected from general relativity and could help physicists to make a significant step...

Is it possible to synthesize adrenaline in the lab?

I read the entry about the Ehrenfest rotating disk paradox on Wikipedia, but the entry does not actually answer my question about what happens to the circumference of the disk in the "resolution of the paradox" section. All I want to know is what happens to the circumference of the rotating...

Hello , We tried to demonstrate preparation of Ammonia by mixing Ammonium Chloride and Calcium Hydroxide in round bottom flask mixed in the proportion of 2:3 . The flask was in a slanting position with the delivery tube attached to a decicator with Calcium Oxide for drying the gas. A Flask...

Hello , i just doing a experiment on error analysis and i am using meter rule . The problem i am facing is , since i use meter rule to measure length and for example i get a result of 115.65cm . After that , i want to convert it to meter , actually how many decimal places should i put in my...

Lab Lovers - ACRONYMS ALERT ALL! (NYM) 10th July 2007 RE: Rehearse Those Acronyms... Dear All, Known affectionately as NIM... Here is a Bit of "FUN" attached Fondest Regards to ALL True Physicists... Yours affectionately Tim (NYM) Newey Cheers!