Lab Definition and 1000 Threads

Greetings All, I am a PhD student in a physical chemistry department. Our research group would like to build our own high termperature ovens for preparing samples. Nothing fancy, just a controlled rise in temperature to a given setpoint, hold it there for a designated amount of time and the...

Homework Statement Action of lipase and bile on milk (Lab) (Biochemistry) Homework Equations None The Attempt at a Solution I can't find information on this lab anywhere! My teacher isn't helping much, so I was hoping for any help whatsoever. Thanks! It's a planning lab - I need...

Every now and then I entertain this thought. The more i study the sciences the more i want to continue studying. I've spent hundreds of dollars on books ranging from physics to mathematics to organic and biochemistry to electronics, I bought Kent's Mechnicals Engineer's Handbook today(mainly...

Homework Statement Well i have a lab practical due for physics and I am having trouble with it. we have to assemble a tri level mobile. that wasn't that hard. the difficult part is doing the math to support my answers. i need to use translational and rotational equilibrium. i looked...

Hi Everyone! I'm a grade 12 physics student and we conducted a momentum lab. On a frictionless surface, we conducted a simple 2D collision and using the data gathered from that, we had to calculated the momemtums and indicate what type of collision had taken place... that was all fine and done...

Homework Statement well this is just a over all question. I am currently taking the AP b and recently i did this lab on collision. there were 3 collisions, a) one stationary while another one hits it b) both masses crash into each other c) both has velocity but one has higher velocity to...

Hi! I have the following problem: Example: collision of 2 electrons For non-relativistic scattering it is easy to show that the speed of the CM frame with respect to the lab frame is equal to the speed of the electrons in the CM frame, expoloiting the fact that in the lab frame, one of the...

Hi I hope I'm posting this in the right section. I am trying to find some experiments that would be appropriate for an introductory biophysics course for some second year students. Any links/pointers in the right direction would be great, although I'm specifically looking for enzyme/molecular...

1. if two projectiles have the same range must they ahve the same intial speed? 2. if the maximum altitudes of two projectiles are the same, must they have the same intial speed? 3. if two projectiles have the same range must they have the same time of flight? 4. two people are standing...

Before I describe the problem, I would like to apologize for my lack of comprehension of this subject. It is the first semester of Physics, but the end, and has become quite complicated. Homework Statement There is a 2.0 L soda bottle used, with a hole a certain height (hhole) from the...

Hi all, so... now that I have to write lab reports at uni level, I'm starting to wonder what software would be best suited for the task. Currently, my workflow goes like this: iWork Pages (or MS Word) for the actual report. imported LaTeX (or Mathematica) PDFs for mathematical equations...

This may be a bit of a silly question, but I'm wondering if it is feasible to design a freshman level lab experiment using a STM? For example, let's say the lab is simply intended to give the students a better appreciation of how a STM operates within the framework of quantum mechanics, with the...

For the simple pendulum lab, I have to find the percent difference between my theoretical and experimental velocity. I found out my theoretical velocity as I used the conservation of energy to generate an equation for v, but I'm having a hard time calculating my velocity from my experimental...

Sorry if this is posted in the wrong area, I am relatively new. Circular Motion Lab is set up like this to study circular motion...

What is the relationship between the mass and velocity of a whirling object? base of graph relationship What is the relationship between the radius of revolution and the velocity of a whirling object? What is the relationship between the velocity of a whirling object and the centripetal...

I need to find the variable m in the following equation rate=k(acetone)m(I2)n(H+)p Here is our expirmental data Exp. 1 10 ml of 4 M acetone + 10 ml of 1 M HCl + 10 ml 0.005 M I2 reacted in 68 sec. Exp. 2 20 ml of 4 M acetone + 10 ml of 1 M HCl + 10 ml 0.005 M I2 reacted in 27.6...

[SIZE="4"][FONT="Book Antiqua"]I did a Hooke's Law lab in class last week and one of the post-experiment questions asks to explain why the graph made should be a straight line and what should the slope and y-intercept be in terms of quantities in this lab? I know that Hooke's Law demonstrates...

Homework Statement Purpose: Determine the mass of a meter stick without directly measuring it. Possible Materials: Select the appropriate materials you will use. __ Meter Stick __ Thermometer __ Stop watch __ Washers __ Knife edge __ Plastic ruler __ Known Masses...

ok i am doing my lab report ow, and i am compeltely lost with some of these questions. it was a titration neutralization lab can get some help? 1- why is it necessary to dissolve the khp in water? 2- why is necessary to swirl the flask during the titration? i think the second one is so...

Homework Statement Please calculate the units for the spring constant k in two fashions. First, from Hooke’s Law (eqn. 5 in lab manual), and then from the period equation for a spring (eqn. 3). Please show that these units are compatible (i.e. mean the same thing).Homework Equations...

i am pretty confused on this. i am currently acing my chemistry test, with minimal effort. The chemistry class also has a lab component to it. I am lucky, that i have a smart partner that i can copy her answers from because i am COMPLETELY LOST in the labs. Its like i have ZERO idea whatsoever...

After performing crystallization and melting point determination I determined that my unknown solid was phthalic acid, however I am left with the question: At the end of the filtration of the purified solid, it was observed that a small quantity of fine colourless particles was contained in the...

Chloroform is used to extract caffeine from water.If the distribution coefficient, KD=10.What relative volume of chloroform-water should be used to extract 90% of the caffeine present in one single extraction? Now i know that KD=Co/Cw and I've solved a question on how much weight of an acid...

Hi, I need to plot a graph of F=kx for my lab report. By measuring x, displacement of spring for every mass (20g, 40g,50g) we found k. Now i need to draw F-x graph. I put my F and x data on graph w/o any problems. But when it comes to draw the line of F=kx i get stuck. Using the line's...

Reaction Lab (NEED HELP!) 1. This is a clock reaction lab where you have 10mL of KIO3 solution in a beaker, and you are adding 10mL of NaHSO3 solution to it. You then start the stopwatch and wait until the solution turns blue. I need to calculate the initial concentrations of KIO3 in each of...

Homework Statement I am writing a formal lab lab report. I have trouble with Appendix section. I am going to put raw dat and sample calculation. And my question is, do I have to number them? For example, APPENDIX 1. raw date(chart) blah, blah blah... 2. sample calculation of...

Homework Statement I know that the light wave must travel 17.3 km or 17300 meters. I found experimentally that the frequency should be 2200 Hz. I picked it from a pool ranging from 0 Hz to 5600 Hz. The goal was to see what frequency was required to get the light to pass correctly through a...

I have the problem attached to this. Any help would be AMAZING. I just don't know what to do for this problem. Thanks in advance!

Hello all, We did a titration lab today. We used Ca(OH)2 in a burret and titrated a 10mL solution of vinegar. The solution of Vinegar was mixed with water, in a 1:20 ratio(inside a flask). So for every 10mL of solution there was 0.5mL of pure vinegar. We used phenothalen as the indicator...

Okay so I did a lab on Linear Motion using the glider with the air track and a spacer. This is the information I have about the glider and spacer. glider mass = (468.7 +/- 0.02) g thickness of spacer =(14.8 +/-0.05) mm I'm stuck on doing the error analysis and I don't know how to go on...

Homework Statement How would doing this experiment in the moom effect the experiment ? "the experiment in lunching a ball against a pendulum and making an inelastic collision find the kenitic engergy and the inital velocity" Homework Equations I found all the answers and I assume the...

Homework Statement We recently did a momentum lab in my AP Physics B class that involved a track with two carts. 1 of the carts was stationary on the track and the other was launched into it. We used sonar detectors at both ends of the tracks to find the velocity (and eventually calculate...

Homework Statement This will be kind of long because it's not just a simple problem, it's a lab. Sorry about that. So the lab is testing the concepts of forces and centripetal force, for starters. We are supposed to be "investigating the relationship between period and acceleration." In class...

Homework Statement So this isn't necessairly a direct problem, but we are currently doing a momentum lab in my AP Physics B course and the lab is basically dealing with 4 cases of collision between two carts. In all cases we are to measure the velocity just before collision of the two carts...

I recently came across this article: http://www.newscientist.com/article/dn14094-bacteria-make-major-evolutionary-shift-in-the-lab.html Has anything on this scale ever been observed before? Lenski's freezer must be an immensely valuable source of evolutionary information. And one question, why...

Homework Statement http://img245.imageshack.us/img245/7259/12214351.jpg Homework Equations The Attempt at a Solution I have no idea, the previous lab i put gravity depend on location, but the teacher marked me wrong If anyone can give me some hints, and i need 3... I don't...

This is my first post to this forum! I'm working on a Lab write up for introductory physics involving projectile motion and velocity. For the experiment we threw a ball such that its motion was as close to parabolic as possible. A video was taken and using a video analysis program we were...

Homework Statement Hi, I'm new the PF and I was wondering if someone could help me with my lab. This was the basic set up of our lab, with one mass being pulled by another mass up an incline. The ramp was placed on a desk while mass B was left to fall towards the ground. What we were...

Homework Statement In class, we conducted a lab experiment in which we placed an object on the end of a piece of wood and lifted the same end of the wood until the object slid down to the bottom. We measured the height the wood was lifted to. (to assist in calculating Coefficient of Friction...

Homework Statement Well the program has several functions but I just really need help with reading a text file and splitting the data in the file into a one-dimensional array and a two-dimensional array The text file is like this... 21 1110 1.5 5.4 6.0 9.8. 8.5 8.3 5.6...

Hi, I want to get a job as a lab technician but I have a bad GPA in physics right now. Is my degree completely worthless; I know I won't be able to go to grad school now, but I would like to continue on to that road even though I be walking on a different path to grad school.

Homework Statement Stationary ball is placed 20 degrees to the right of the moving ball's trajectory. Both balls are of same weight. Collision occurs and balls part at 90 degree angle. We measured it and it was 90 degrees on two occasions. Explain why it is 90. Homework Equations...

http://www.google.com/hostednews/ap/article/ALeqM5gbl9HOrXrN5zLTpmFDu7ZnL88vTgD9B80NL80 And it seems nobody has a clue about the motive.

Homework Statement A plant takes in 20.24 kg/day Al, 24.04 kg/day S8, 48.00 kg/day 02, and 753 kg/day H2O. It's product stream is 254.3 kg/day AlSO4+12(H2O). The rest of it's water goes to "other things". How much water goes to other things? Homework Equations...

Q1: Why are titrations using permanganate performed in acid solution? Q2: A bottle containing a standard solution of potassium permanganateis found to have brown stains on the inside. Why will this potassium permanganate be of no further use for quantitative experiments? KNOWN: Potassium...

Homework Statement We did a pendulum lab and found Q then we were asked to find K from that. The professor gave us a formula K= 4pi2/m2 where m was the slope of a line on a graph of our periods vs lengthQ then stated it should be number we would recognize. I assumed maybe we were going to...

I have a serious question to ask of anyone who can be of help. It is necessary that I say a few things about myself first so please read on I promise that this has to do with physics. Ever since I was 6 years old, I wanted to be a nature photographer. I worked for 7 years after high school as...

Homework Statement A cart is released from rest with varrying masses down an inclined track. Determine whether or not mass affects acceleration in this case. This is what I calculated through all the data: θ = approx 5 degrees M1: Vavg = 0.7816 --> Aavg = 0.977 M2: Vavg = 0.8385 --> Aavg...

Homework Statement The experiment was changing dimethyl maleate into dimethyl fumerate, with the intent of being analogous to changing maleic acid into fumeric acid. In the experiment, we added 1 M Bromine in dimethylchlorine to our dimethyl fumerate, put the mixture in a hot water bath and...

Homework Statement Hi all. I did a lab in physics and am struggling with a question. The lab involved dropping an object that had clear and black bands on it through a photogate to determine velocity and time. The question I'm struggling with is... Looking at the RAW DATA, you should...