Lab Definition and 1000 Threads

Homework Statement We have to investigate a factor that affects friction. For my expiriment, I placed a wooden block on a flat surface, and increased the force pulling the object using a Newton meter until the block moved. I increased the mass and the force required to pull it increased...

Our Physics class is doing a lab on circuits, and I need some help. I am either really confused about what to do or using incorrect data. You have a power outlet that is set up like this: 1 2 3 4 where 1, 2, 3, and 4 represent individual outlets. (for clarification, it looks like...

Okay, so I have a quick question about a problem in my lab. The question is: Calculate the number or moles of atoms of magnesium ribbon used. Now there is just too many "of"s in that sentence for me. Now this maybe a stupid question, but what is the question asking exactly? What do I...

I have to perform a "lab practical" tomorrow for my E&M class and it involves using a multimeter to determine what is inside a "black box" - either a battery/resistor combo or a capacitor. Homework Statement Taken from the lab practical write-up: "You’ll be given a box with two...

Homework Statement Assuming stomach acid is 0.1 M HCl(aq), what volume of stomach acid can be neutralized by one antacid tablet? We have the titration curve we got with .5M HCl titrating a tablet dissolved in 100ml distilled water Homework Equations ? The Attempt at a Solution ?

Homework Statement Describe how you would prepare exactly 250 mL of .180 M K2S2O8 solution for use. Assume that you have a supply of solid K2S2O8, deionized water, a balance, and a volumetric flask. Also, how many grams of K2S2O8 would you need? Homework Equations The Attempt at a...

Homework Statement I am doing a lab report where I have to find a maximum range and at what angle it occurs. For the range equation I am using a range equation with the initial velocity, theta, g and h as variables. There clearly is a problem since my units do not match up, and I can't find...

Homework Statement X" + X = 2Asin (t - 8) Homework Equations The Attempt at a Solution I don't really even know where to begin. I got this lab as just an assistant and it's just something they were talking about and I'm not really sure how to start.

Homework Statement we wish to measure the resistance of a lit light bulb. Unfortunately, the resistance of the light bulb when hot is not the same as when it is cold. when the light bulb is turned on it becomes hot. we cannot easily measure the resistance of the light bulb when it is on (hot)...

Homework Statement I have just done a lab and I am very confused on what to do. 2 batteries 3 resistors - 3 currents -> received by testing. So i have to do the theoretical equations ive done the lab and got the currents and so far I've came up with this. ( -V2 + Vt1 - V1...

Homework Statement This isn't really a homework question- at the end of my last lab, in which we measured the time required to charge and drain a 10micro farad capacitor with a 100k resistor hooked up to a switch and a 9 volt battery our professor asked us what the natural log of voltage...

I have just created a rainbow artificially and the photo is attached. I didn't expect the bow to come out straight as it has. Does anyone have any idea why it is straight and not curved (or circular)? I know rainbows are normally curved (or spherical) normally because the particles that the...

Homework Statement In a certain experiment, the power (P) radiated by a light bulb filament was measured as a function of the filament's absolute temperature (T). Data: P(W) 0.45 0.95 1.8 3.5 5.6 T(K) 1000 1200 1500 1800 2000 (a) Plot the data (Done) (b) Assume a power...

Homework Statement Explain the significance of the two primary rays and what that means for the general rules for reflection(refraction) Homework Equations No equation for it. The Attempt at a Solution No attempt, still trying to figure out what primary rays(My guess is ultraviolet...

Homework Statement In class we all measured a sheet of paper with a meter stick. We measured it in meters, and guessed about what the size is in meters. Then we did the same with decimeters, centimeters and millimeters. The measurements we got were .3 meters, 2.8 decimeters, 27.9...

Homework Statement Overall goals: Your first task will be to make a buffer solution of defined pH. Part of your grade will be based on how close your solution comes to the desired pH. Your second task will be to titrate your buffer using 0.5 M NaOH or 0.5 M HCl until the buffer “breaks”...

Homework Statement I did a lab where there was a glass tube with a rubber ball attached and a string hanging from the glass tube with metal washers attached at the bottom. My question is if the ball were to hang too low why would the centripetal force be less accurate is it because there...

I need some help with developing an idea for my design lab. it is a lab where we must come up iwth a problem to solve on our own. This time we are to discover something new about acids and bases. What would be a good problem? thank you!

Do accelerators collide at energies high enough to reproduce the big bang nucleosynthesis, if they are producing quark-gluon plasmas shouldn't it be possible, or is the time too small for such a thing to happen?

Hi i have a problem with some work. a muon type neutrino interacts with a stationary electron, producing a muon and electron type neutrino. I have calculated the CM energy but now need to calculate gamma, the lorentz boost. γ=(Eν/2me)^1/2 How do i show this? the info i have is that...

Hey guys, I was just wondering what is an error during a lab? I always get these parts wrong on my lab, mainly because I don't know of any errors that are occurring in a lab. For my lab I was using a ballistics pendulum and sometimes the rod wouldn't pull back right or shoot right. Would that...

Specific Heat Capacity Lab I conducted a lab where I heated 100ml of water using a heating coil with a current of 4A passing through it. The temperature data turned out beautifully, with the temperature rising evenly until it plateaued just under 100 degrees celsius as it began to change phase...

Homework Statement I need to design a lab that will give me 5 points that produce a constant slope. Homework Equations I want to use the equation for emf E=Blv I would re-arrange it to make E/Bv = l Where B and v are my constantly increasing data points, E is measured by some sort of...

I'm trying to acquire an entry level lab tech/analyst position but have had very little correspondence from prospective employers. Currently, I only hold an associate's degree as a Biological Technician and am still a few years away from graduating with my B.S. in Biochemistry. My professional...

Homework Statement 2. Question 3 The Attempt at a Solution I would like to state the fact that friction during the lab was not taken account of however I do not understand how that ties into question number three... Is it because the graph is based on a theoretical value which is...

Hey all, I'm trying to prepare for an upcoming Physics lab practical, but I'm having a hard time trying to figure this thing out. I'm not a Physics major, and I really don't have the "eye" that some other people have on what comes to Physics problems. I'm hoping that somebody could help me...

Homework Statement Hi everyone. I must say that for one thing, my physics teacher is incapable of explaining. We started this topic a day ago and now he asked us to perform a lab to find the relationship between the variables. I don't know what that means but I will add my thoughts in B3. So...

Homework Statement If you had data from a lot of different frequencies, how could you use a slope to find the speed of sound? Explain in detail. Given/Known: So basically we did a lab where we used 3 different tuning forks and hit them over a tube filled with water. We recorded where we...

In a lab we were supposed to produce a rollercoaster ramp while it had a loop, and then to drop a marble at a height where it would finish the entire path without falling off, with enough centripetal acceleration at the loop. we were not given the mass of the marble, and we were only given a...

Homework Statement We dropped coffee filters from 4.39 M recording the time it took for them to fall, and their masses as followed. 1 Filter- Mass= .86G, Time it took to hit the ground= 3.94s 2 Filters- Mass= 1.76g, Time it took to hit the ground= 3.25s 3 Filters- Mass= 2.72g, Time it took...

Homework Statement We recently had a Physics lab where we were expected to find a relationship between the moment of inertia and discs of varying radius (discs have same mass), and develop a general equation to illustrate the relationship between moment of inertia and radius for discs of any...

Homework Statement Calculate the maximum height and the initial speed of the rocket. Show The equaltions and then show your substitutions. The total flight time was 6.52 seconds. the height time will be expressed in meters and feet and the velocity will be expressed at m/s, feet/second...

Hi I've been reading through different laborator manuals on the same experiment, you may be familiar with the experiment. Using a tape timer, or spark timer to measure the velocities and acceleration of a moving body, assuming its moving with constant acceleration. The lab utlizes the...

Homework Statement 1. what happened to the amount of friction between the surface and the shoe was the force of gravity was increased? 2. when a piece of paper was placed between the shoe and the surface(table), was more force, less force, or the same force needed to pull the shoe...

The question asks to suggest a method to synthesize phenyl salicylate. It's an extension question that I know involves using a method similar to the one used to synthesize aspirin (i.e. dehydrate acetic acid to produce acetic anhydride and then combine that with salicylic acid to form aspirin)...

Homework Statement "Place the geiger counter in the plastic 241Am alpha-source enclosure. (basically, a distance of air separates the geiger counter window and the 241Am source) Re-apply the voltage and determine the counting rate. Repeat with various numbers of very thin mylar sheets on...

Hi folks, I was wondering if any of you have heard about research and development staff working remotely at a national lab after working there for several years? I had met one individual at a conference who worked at LANL, but lived in Georgia. His work was computer-based, so he didn't have...

Homework Statement In class we made rockets out of 2L bottles and launched them using pressurized water. The angle that ours went at was 50 degress. Height was 26m. Hangtime 5.18s acceleration 3.8m/s2 and the mass of the rocket was .52kg Homework Equations I am trying to find the...

I do not know how to write physics lab report and error analysis. Are there any sample on some websites?

lab report least square fiiting line "error"? what is least square fiiting line "error"? y=A+Bx It is said that there is errors involved in A and B;So the least square line has to be compared to some other lines to determine the errors. But how to do it? Are there any formulas?? Thank you!

Homework Statement I am trying to draw a change in velocity vector connecting from V1 to -V0, but I can't seem to figure it out. How do I show you guys what my problem is? Homework Equations N / A The Attempt at a Solution Googled for help

Effervescent Antacid Lab! Need Help! Fast! OK! I have a class where I need to design an Effervescent Antacid Lab. (Alka-seltzer). The point is to find how many Moles of CO2 are produced when 325 mg of aspirin (C9H8O4) 1000 mg of citric acid (C6H8O7) and 1916 mg Sodium Bicarbonate (NaHCO3) react...

Hi, I was wondering how much Mg will react with 3M of HCL?

Homework Statement In last weeks lab, I was asked to find the resistance of two unknown resistors. I hooked them up in series with a 10V source and measured the current across each one. The ammeter read 5.77 mA at Rx and .014 mA at Ry. Shouldn't the ammeter have read the same value at both...

Homework Statement I'm doing a lab report for frequency vs centripetal force and frequency vs radius. I have two tables and I have found the equations for both the graphs. When I combine the equations, should I make another table and how would it look like? Homework Equations f = c0.5 f...

Homework Statement I have to do a lab report on centripetal force, frequency and radius. My question is, does a graph have to show the (0,0) points? Also, I got an equation out of the graphing software for one of the graphs and it was y = 1.51x^0.4233, is it okay to use this equation or y =...

Hello, Does anyone know where to get prescription lab goggles? I'm sick of my glasses being squished to my face. Google has not been much help. If anyone has ever had a pair let me know, please. Thank You.

I just started the semester off in physics lab and I am so rusty. I did three perfectly okay by myself but these last three I can't seem to figure out. Any help on the direction to take with these is appreciated! c) T = 0.433 ± 0.004 s. Calculate T^2 andΔT^2. d) Given d = vt, v = 55...

Now, before I begin, let me say that I have no idea where this would go. It's homework, and it does pertain to introductory physics, but I'm really asking more for general tips than answers to any specific problem. So, I have a lab report due in about 9 hours. I've already gotten part of it...

[b]1. The aim of the lab is to verify the centripetal acceleration law which states that acceleration is equal to the velocity squared divided by the radius. During the lab, we spun a string powered whirligig. There was a ball at the top, attached to string, the string was threaded through a...