Lab Definition and 1000 Threads

I need help with this lab I'm doing involving swinging a mass in a circle (I'm sure you guys have heard of it). I have to plot a graph of Radius vs. FT^2 and then compare the value of the slope to its theoretical value. A couple questions: Which goes on the y axis? Radius or FT^2? How do I...

Hi, We have been working on a lab that dealt with oscillations and simple harmonic motion. We attached two springs to an air cart, placed it on an air track, and released a distance of 10cm from the equilibirum point. To investigate the relationship between mass and the period, we added 50...

Hi Y'all, I would like to demonstrate electron tunneling in my Modern Physics lab class. Does anyone know of how to set such an experiment up? We have a lot of equipment and $$$ available, so that's not a problem. I don't want to ask the prof beforehand because he's kinda dumb.

So, we just did our lab on KE and GPE...the usual one on an air cart with paper clips...and i have been having trouble with a couple of the questions Why would we have measured the distance traveled from the center of the cart and not the end like previously? Is it something to do with the...

after the ap exam, our teacher is making us create our a physics lab touching on one or more of the ap topics (we want to stick to force/kinematics/easier topics). I'm working with another person, and we're having a hard time thinking of a lab that wouldn't be too difficult to set up. (we don't...

hello, The other day in class i completed a lab colliding two cars into each other 3 times. The first time velcro was attached to the cars so they stuck together after the collision, the second time a spring was attached to one of the cars and the third time it was just the plain bumpers...

Homework Statement I have had to do 6 labs for physics class, and i am now trying to write them up, but am a little confused. The first lab i did was to verify the equation v=f?. I yoused a generator to make a straight wave, and then put in a barrier to make a standing wave. I have to...

[Chemistry Lab] Cannnizzaro Reaction Hi! I am having some questions about my chemistry lab. In the lab we are given 1 of the 5 unknown aldehyde (benzaldehyde, anisaldehyde, nitrobenzaldehyde, chlorobenzaldehyde, and dimethoxybenzaldehyde) and reacts it with methanol and KOH to undergo...

how are they done at the college level? I would relaly like to compare actualy college level lab reports to my AP chemistry level lab reports. I know that they are usually done in pen and paper, but if someone could scan one so i could look at it I would greatly appreciate it thanks.

A quick question that would request a quick response.. please help. Prepare, by mixing proper quantities of silver nitrate and sodium acetate solutions, approximately 0.3 millimole of silver acetate. Wash this precipitate with a small quantity of distilled water and transfer it to a test tube...

Hello. At our school we are required to write an essay 4000 long (IB diploma extended essay), probably to give an insight into what we will do in university. I chose to do a topic related to physics. For physics, they recommend us to have a good question where an experiment is feasible so we...

I'm very confused with an electrochemistry lab. For the lab, we used Al+3, Cu+2, Fe+3, Zn+2, and KNO3. The setup was wells with all of the solutions in them. We soaked a piece of paper(filter paper) in KNO3 for the reactions, then used the paper as a salt bridge between the solutions of the...

I'm very confused with an electrochemistry lab. For the lab, we used Al+3, Cu+2, Fe+3, Zn+2, and KNO3. The setup was wells with all of the solutions in them. We soaked a piece of paper(filter paper) in KNO3 for the reactions, then used the paper as a salt bridge between the solutions of the...

Bee has organized an informal working and discussion group at Perimeter for people researching ways to empirically test QG ideas they found a room where they can meet Tuesday afternoons, and part of organizing the group was to set up a BLOG, http://qglab.blogspot.com/ which she says is...

We did a lab at our school recently but some of the questions regarding the lab confused me. The data obtained from the lab is here: Determining the Chemical Formula of a Hydrate Purpose Find the molecular formula of the hydrate of Copper (II) Sulfate, CuSO4 x H20. Prediction When the...

hi, i am doing a lab about analyzing one-dimensional collisions. There are two synthesis questions that i don't know how to even begin with. 1. How could the results of this investigation be applied to determine the mass of a sealed refuse bag on board the International Space Station...

Homework Statement This isn't really a textbook or a homework problem...rather it is a question I have in trying to write up my lab report. I am doing an experiment about the photoelectric effect in trying to determine Planck's constant h experimentally...and basically I am shining...

Homework Statement The phenyl ester of salicylic acid, phenyl salicylate, is also a useful pharmaceutical. But phenol does not react with salicylic acid directly. Suggest a possible method to accomplish the synthesis of phenyl salicylate.Homework Equations This question has been included in...

Recently had a lab on Rotational motion and mass distribution (strange as it wasn’t covered in class yet), and there were a few questions I needed to answer. I’m doing my best to understand the lab and concept, and I was hoping that someone could possibly broaden my understanding and tell me if...

Homework Statement The question asks: Using the measured cell potential and the Nernst equation, calculate the [Ag+] in the test solution. However, you guys will need a little bit of background information to answer this question since it is a lab. First of all this reaction was: Ag2CO3(s)...

Hello all, Im trying to do this magnetic field lab and am having trouble with the very last question. It goes: "Assuming the equation (Ampere's Law: B=unI) applies for the solenoid, calculate the value and uncertainty of u (permeability of free space) using the graph of B vs. n. In this...

I have to program the range formula R= [Vo2sin(2*theta)]/g, into an Excel spredsheet. I need to progran the equation for various values of 'theta' to determine for which value(s) of 'thet' is the range maximum. Table should have left side Injection angle (degrees), right side Range (R). The...

I'm currently enrolled in a lab class about circuits. we are doing diodes, transistors, op-amps these days. the thing is, I've never taken any circuit analysis before, but the prof. expects us to be able to understand op-amp, diodes, transistors... and be able to calculate quantities for...

can n e one help me with my lab? :confused: we had to mix a)drano (a substance used to unclog drains) with water b) ammonium chloride with water can you tell me if these are chemical or physical changes and whyyy?? THANKZZ A BUNCH!

I performed a lab where I had to find the acceleration of two masses that were connected by a string and hanging on a pulley. The equation used was: http://home.earthlink.net/~copper017/Random/PhysicsLab/acceleration.jpg After performing the calculations I got the following data...

http://img366.imageshack.us/img366/5171/phwq5.jpg Hello there. In lab, we measured vectors. I'm having a little concern on how to get X and Y. If I follow the books method, R_calc comes out too small compare to measure R. (Big % error). X: 15.5+12.4cos37 = 25.4 Y: 0+9.3sin37 = 5.4 R: square...

I performed a lab this past week that went over charging/discharing time constants, and I was asked the following about the circuit below: http://synthdriven.com/images/deletable/EEN204-Lab3.jpg Calculate the charing time constant, (Tau_c), and the discharging time constant, (Tau_d). I was...

Can someone please verify my results? and help me in one-2 questions? I did this lab in school today and had some problems filling in the table that followed. In the lab, we took some Copper Chloride and mixed it dionized water. Then we added in an iron nail and waited for about 20 mins. After...

I am enrolled in an electronics components experimentation class and we have just finished an experiment couple days ago regarding notch filter. Basically, we set up a function generator, and measure voltage output using oscilloscope. We set up a circuit with an inductor-capacitor in...

I originally posted this in the homework help section but I didn't get a response so I'm going to post it here. Please don't remove it if you are a moderator because I need this answered as soon as possible and I don't think I was going to get an answer from the homework help section...

Homework Statement A lab I'm assigned concerning simple harmonic motion uses a simple spring attached to a mass system...it asks me to "investigate the period-mass relationship. determine the period of oscillation of your system for several different masses. Verify that your data is consistent...

Homework Statement Is this enough for an evaluation and conclusion? If not, what do you think I should add? Homework Equations Conclusion : Our graphs further corroborate Newton’s Second law, which states that acceleration is directly proportional the net force, and inversely...

Hello, I am wondering if anybody has any advice on which direction is better for somebody who hopes to work as a tenured university professor. I am a PhD candidate in Material Science. My work is 70% experimental (ion implantation, SEM,Auger, and XPS) and 30% computational (ab-initio, and MD...

Match each compound below with its solubilty characteristics (If the first corresponds to B, and the next 2 to C, enter BCC) ( TEN tries allowed ) 1) ethyl-4-aminobenzoate A. Soluble only in aqueous bases 2) Napthalene B. Soluble in ether, largely insoluble in aqueous solvents...

Hi Guys, I have a question and its regarding to the freezing point depression lab ... I did an experiment where I had to find an "i" value for KCl. I'm getting 2.4 for "i" ... but the theoratical value is 2. I was just wondering why expriment value os higher than the theortical value ? what...

Hello all, Do you have exams for physics labs? How is the exam done? Theoretical or experimental? Thank you

Homework Statement You are given a mixture containing two compounds, A and B. Both compounds have a solubility of 1g/100mL of solvent at 20 degree celcius and 12g/100mL of solvent at 100 degree celcius. The sample is composed of 1.5g of A and 10g of B. At 100 degree celcius all of the...

Homework Statement The other day, I was asked to conduct an experiment involving momentum. Basically, I set two mini-carts bumper to bumper, and hit a switch that caused them to push away from each other and travel in opposite directions. We then had to repeat the experiment using different...

Ok, first I'll mention that I'm completely new to these forms (first post) and all that jazz. Anyway, on to the subject of the post. In my physics class (high school level only, mind you) we were doing a lab with long slinkies to show the properties of waves and such. Our teacher wanted us to...

So, i did a lab where we find the center of mass of a meter stick and then move the pivot point away from the CM and then add masses to bring it to equilibrium again. By finding the torque of the hanging mass, using the formula "Torque of hanging mass = Fh (Dist hanger to pivot)" we also find...

Homework Statement I am responsible for coming up with an experiment to determine how the following 3 factors affect the force of friction: weight, surface area and speed. The directions given inlcude: "You will need to measure the magnitude of the force of friction. Since the...

This is a question pertaining to a lab we did. Ill try to describe it the best i can. What we pratically did was attach a rubber stopper to an end of a string, put the string to a hollow tube (like a torn apart pen), and tied a mass on the bottom. We had to hold on the tube and start swinging...

Homework Statement Im doing an impulse-change in momentum lab, and somethings not adding up. My data is as follows: Trial Vmin Vmax Mass Impulse 1 -.6447 .5766 .548 .9952 2 -.9044 .7803 .598...

Hello, I am new here but am completley stuck on a lab that I need done for tommorow. I am doing a torque lab, with a meter stick being used as a scale and I know the mass of it. You can basically think of the meter stick as a seesaw with only one person on one end. I have attached weights...

Homework Statement k so we are doing a lab on determining the chemical formula of a hydrate (CuSO4.xH20) wat i need help on is these following questions: 1. suppose the hydrate was heated too quickly and some of it was lost as it spattered out of the container explain how this would affect...

For the first part of my lab, I have a graph with pressure(atm) as a function of temperature(K). For the second part of my lab, I have a graph with pressure(atm) as a function of inverse volume(mL^-1) For both of these, i am supposed to find the value for R, the gas constant. So far far...

http://www.princeton.edu/~paw/archive_new/PAW06-07/04-1108/notebook.html#Notebook8

transverse longitudinal waves : slinky lab! so this lab we did is called the transmission and reflection of a one-dimensional transverse wave... 1. we created a transverse pulse from one side and observed a point near the middle of the spring as the pulse passed... - > so i wrote that it just...

I'm doing a Pedelum Periods lab to measure the period in different amplitude,length, and bob mass. There is a program called loggerpro that most people might know and some might not Anyways the photogate measures the period but the question is 1) Why is Logger Pro set up to report the...

we used a converging lens and a screen with white paper in front of a window to form an image of a distant tree outside. This was about 15cm. When we used an optics bench and a candle to figure out the focus, it was 16.3cm... What would be a reason for the difference in the number?