What is Lab: Definition and 1000 Discussions

I'm currently a chemistry major (senior), but I intend to go to graduate school for physics, so quantum optics lab would me more useful to me than materials chemistry lab. I emailed the physics counselor (since the class is restricted to physics majors) and she said that it would be to...

Homework Statement uploaded is the circuit with resistors technically in series. R1 had a measured value of 160 ohms (from A to B) 0.0617 Amps R2 had a measured value of 387 ohms (from B to C) 0.025 amps from A to C the resistance measured is 243.9 ohms 0.041 amps this means that there is a...

Homework Statement In this experiment we tied a cart to a hanging mass and measured the velocity as it passed through a gate, and recorded the mass of the cart. I calculated the potential and kinetic energy of the hanging mass and when I subtracted the potential from the kinetic, I got a...

This is the result from a lab,but I am not sure the results are correct. I guess the combination of R1=10k and R2=10k is under linear region,but how come the calculated Ib is zero. For combination of R1=10k and R2=1k,Idon't know why the Ie is negative.Negative value means error?Is it the...

1. Lab Method The method for determining the Hall Effect is as follows: This is the method that I was instructed to follow: A current source was connected across a germanium wafer The voltage across the wafer (in the direction of current) was measured with a multimeter A magnetic field was...

Homework Statement I need to come up with a formula to solve for i2 given the diagram of the circuit attached. I can identify 2 junctions and 3 loops. Homework Equations *The algebraic sum of the currents into any junction is 0. By convention the currents entering the junction are positive...

I'm the communications officer for our community college American Chemical Society chapter. I would like to have professionals involved in the industry influence us students that are in the academic setting. I believe that the insight they have may have could be a good way to cultivate...

Homework Statement Figures 1 (a), (b), and (c) show low-pass, bandpass, and high-pass filters. Write the transfer function H(ω) for each of these filters, showing the ratio Vout/Vin as a function of the angular frequency ω of the input voltage. -The low-pass filter calculations...

I am currently analyzing my data for the physical chemistry magnetic susceptibility lab. All the data is giving nice, smooth graphs for force vs. current, but I am unable to linearize them. F = \frac{1}{2}\chi\mu_{0}AH^{2} I have plotted force vs. current and force vs. current squared...

For an upcoming lab I will be mapping out the equipotential lines in an electric field with an isolated conductor in it. The conductor is a hollow cylinder. I have attached a crude paint drawing of the apparatus. The lab asks some qualitative questions that I would like to knock out before hand...

Homework Statement This is a required analysis for my Physics II lab. We recorded the motion of an object oscillating on spring, and are asked to use the slopes of different graphs that we plotted using the data collected in lab in order to find the spring constant (k). Both graphs were...

Homework Statement This was the procedure for the lab: Find the mass of the Styrofoam cup. Half fill it with warm water at a temperature of about 50 degrees C. Determine the mass of the water and the cup. Dry off some small pieces of ice with the paper towel. Record the temperature of...

In class we did a lab regarding the wave nature of light. We pretty much conducted Young's double slit experiment. For the lab we were supposed to establish the relationship between the distance from the slits to the viewing screen and the distance between successive maxima. Can anyone...

Hey guys, I'm in the middle of writing a lab report and I'm having trouble with my abstract. I know as a 3rd year uni student I should know how to write one by now. I feel it's a bit long, what do you think? How could I improve? I'm not asking you to write it for me just some hints. The...

Homework Statement I am working on the analysis portion of a lab. The experiment was dropping varying masses connected to a cart by a string and pulley. The cart's mass was constant in each trial, but the hanging mass was increased each trial. We were measuring the acceleration of the cart...

Is there a relationship between increasing temperature in one test tube and keeping the other temperature constant and the time it takes to reach thermal equilibrium Homework Statement Is there are relationship between increasing the temperature of water and keeping the other same and the...

So we did a lab in physics today and it was a contraption where we had a stopper on one get of the string, and weights on the other, and we spun the stopper around, and there's 4 questions that i don't under stand, so if you could help me with this, and please explain as i want to know how to do...

So we did a lab in physics today and it was a contraption where we had a stopper on one get of the string, and weights on the other, and we spun the stopper around, and there's 4 questions that i don't under stand, so if you could help me with this, and please explain as i want to know how to do...

Homework Statement I'm having huge issues on the Zeeman Effect lab- the goal being to get the Bohr magneton. The problem is I do not know how to measure the rings. Can I simply measure this with a ruler? How many of the rings do I have to measure in one picture?

I'm currently in a modern physics class and one of our labs was an electron scattering experiment that required the use of a cathode ray tube and a target foil. We aim the electron beam through one of four quadrants on the target foil and measure the diameter of the ring diffraction pattern...

So, I've obtained a graph of lab data an it's a plot of thermal resistance versus pressure. Pressure on the x and thermal resistance on the y. If I plot all the points, there doesn't seem to be any trend. The y values are just as likely to decrease as they are to increase with increasing x...

So I received a lab today for physics. The first part of the lab I finished in about 20 minutes,had no trouble with it, but I don't understand what I'm doing wrong in the second part. I have to find the density of steel in excel, using experimental data that we found in class a few weeks ago...

The problem I am currently trying to right a lab report on a experiment trying to find a flywheels moment of inertia. In the lab we had a fly wheel connected to a mass on a string, and measured the position of a point on the wheel as the mass was accelerating downwards. The data was analysed...

Hi, I have to plan and carry out an experiment on thermal radiation as part of my physics lab module. The description of the experiment is as follows: Investigate the radiation from a bulb filament as a function of input power, using a pyrometer to measure the temperature of the filament...

1. This is about a lab, we measured times of partial discharge(each 100 ml), and the height from the base to the interface, from a cylindrical reservoir, through a little hole near the base. We must now calculate the theoretical times to compare with the ones measured experimentally, and the...

I'm currently doing some research at the moment for my professor, and he gave me a list of things to look at. Before he had me calculate the "real center of mass cross section." Now, starting at point 0 for publication, he's having me go through and do some other things. In his list of things to...

I wasn't sure which section to post this, I was going to put this in learning materials: https://www.physicsforums.com/forumdisplay.php?f=151 But it says I cannot post there...anyway, Are there any good programs, preferably free or inexpensive, that are useful for drawing professional...

Hello, I'm writing my lab report for my Franck Hertz oscillation and I seem to be stuck on analysis part where I have to perform auto-correlations. Could anyone please guide me through steps 2-4 on excel? I absolute have no idea what the steps 2-4 is asking me to do. For instance, for step...

Hi, I'm a student working with my group to create a lab for our final lab project. Me and my teammates are stuck on how we should begin to set up the project. I attached 4 photos, one of the pendulum setup, one of the model of our pendulum setup, and two others of the lab sheet guide. The...

In this lab I am supposed to find specific heat of metal, and then recalculate the specific heat using a final temp. 1 degree Celsius above and below measured value. I am really struggling with finding this specific heat of the metal. The lab is this: mass of water: 200 g. Initial temp of...

Homework Statement I wasn't sure where to post this question. I hope I picked the right section of the forums. This is from intermediate lab. The lab is for Bragg diffraction using microwaves. The grazing angle is a measured quantity along with the voltage (which was measured using an...

lab report -- How to write better lab reports in chemistry? Hi, I get very grateful if you help me get exampler on lab reporter on chemistry. I just want to read them, how can you write a better way because I'm not erfaran on engliska.

Lab issue -- Please check my projectile launcher calculations I am making a lab for a class I teach and my results aren't working out and I need another pair of eyes to see if my method is wrong (I apologize if this should go in homework, but it isn't a homework question so I thought it should...

This question is based on a modern physics lab I'm working on, and it's conceptually killing me. 1. Homework Statement For hydrogen, compare your measured wavelengths to the predicted wavelengths for hydrogen. Assuming the lower level is the same for all the lines you observed in the...

I am currently a senior at a no name liberal arts college studying math and physics. I am unsure about want I want to do in the future, but I am considering engineering for graduate school in the far future. Field yet to be determined. Last year I took an advance physics lab course and...

a)Write a function,named getNumSum(),for accumulating(summing)float numbers; -The function has no return value -The function has 1 input argument named aSum:the current accumulative sum to be "updated" inside this function(Hint:use pass by reference) -The function asks user for a float...

Hello. I feel as though I should mention (before I say anything else) that this is my first year in grad school (first SEMESTER even). I haven't taken any modern physics lab courses (aside from an undergrad course years ago) that would help me with my research or my question. My PhD...

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Homework Statement We are given 3 coffee filters. Using a stopwatch and a meter stick, make measurements to predict how long it would take for those filters to fall down a stairwell. Come up with an experimental method to predict this time. During the lab, we will be told the number of...

Homework Statement Wooden block: Mass: .095. Weight: .931. Volume: 2.03E-4. Density: 467.98. Buoyant force of block: 1.9894. - Predict how much weight the wooden block can support before sinking. Homework Equations W= m1g + m2g The Attempt at a Solution Not sure where to...

Gr. 11 Projectile motion lab? Homework Statement we are conducting an experiment where a ball is being shot from a cannon from a height of 1.435m we have already calculated our initial velocity, which is 5.442m/s, by timing and measuring when the ball is shot and lands 5 times. Then find...

Homework Statement The lab book asks me to graph velocity vs time and use the slope to calculate g, than compare it to the experimental value of g. The air glider was timed at various distances with a set height. The height was 0.002035m and the distances were 0.20m 0.40m, 0.50m, 0.75m and...

Homework Statement I performed an experiment recently, which required me to heat a flask and an unknown compound to constant weight. The unknown was supposed to be a mixture of calcium sulfate dihydrate and NaCl. My goal for this lab was to determine the % NaCl in the mixture. My percent error...

I wasn't exactly paying much attention during our lab, partially because it was right in the middle of midterms and I wanted to solely focus on those. Now it is coming back to bite me as I am not entirely sure how to complete my lab report, or the theory behind the lab really. If you would like...

Physics lab on energy need help! Homework Statement Need to find velocity and time when I know all lengths/heights. Need to look at picture to fully understand my problem. Homework Equations Projectile motion equations... And velocity equations.. The Attempt at a Solution On picture

Homework Statement The lab is attached. I've also attached the pre-lab just for the diagram. Homework Equations The Attempt at a Solution Can anyone think of some good errors for this lab? We ended up with ~80% error. I've thought of two: 1. Adjusting the potentiometer so...

Homework Statement Hi, I was working on my lab report and I got stuck. I was trying to get some input please. So my experiment was to put 2ml of cornstarch, 2ml saliva, 2ml HCl. I vary the HCl concentration in 3 test tubes. I have one test tube that is just 2mL HOH. I added iodine in and I...

Homework Statement There is a box pulled up a ramp at an angle, θ via a pulley system with a mass m1 at the end, accelerating downward under the influence of gravity and tension in the rope connected to the box. The goal is to find the coefficient of kinetic friction between the leather bottom...

I'm doing a physics lab right now and to find tension we use the equation T=m(g-a) where m is the suspended mass and t is tension. I'm not sure if g should be negative or positive. I'm guessing negative but I am not to sure.

Hello. I am performing some biochemical process where the end product is going to be intended for human consumption. I am curious where I can buy large quantities of ethanol that is safe for drinking. I don't want to use the liquor store corn alcohol because it has some impurities...