Lab Definition and 1000 Threads

Homework Statement Problem statement: We are measuring the flow rates of liquids of different viscosities through holes of varying sizes. We ultimately want to observe the relationship between the viscosity and the flow rate, and also between the diameter and the flow rate. Variables...

Homework Statement Determine the error in the calculated centripetal force, F (dynamic), for each value of r from the estimated error in the quantities m, r, and from the standard deviation from the mean of your three measurements of f. Derive the equation for the error using Rule # 2 for...

Hello, I am pretty nervous about working in a lab for a professor at my university this summer... I am currently in the second semester of physics introductory courses, and this professor completed his PhD at one of the best universities in the world... Does anyone have any advice about what I...

In my physics class for an assessment we designed our own lab. In our lab we had plastic cups and cut small holes in the bottom ranging from 0.3 cm to 1.3 cm diameters. We then measured the amount of time it took for different volumes of water, detergent, syrup and rubbing alcohol. I...

Physics lab normal force please help! A 1000-kg car moves at a maximum speed so that it does not skid off the 50-m radius level track. If the coefficient of static friction between the road and wheels is 0.80. What is the maximum speed? Assume that the gravitational constant is 10.0 N/kg =10.0...

I apologize in advance if some of my answers don't quite make sense. I'm generally articulate, but not when it comes to physics I'm barely grasping. I did a lab and part of it was dropping a magnet through a coil, which produced a Voltage vs Time graph using LabPro. For trial 1 we had the N...

Homework Statement I have 2 blocks. M1 is resting on a horizontal plane and attached to a string that goes over a pulley to M2. The plane is like an air hockey table to simulate very little friction. I attached spark tape to M1 so I could measure the time it took and distance traveled. Now...

Homework Statement "You are asked to do an experiment where you will need to use a rotating blade to measure the wind speed. You measure the number of rotations of the blade at 10 different wind speeds, 10 times each and will make a linear fit to determine the wind speed as a function of...

Need help calculating friction and normal force for "Measuring Friction" Lab Hey guys, I'm not great at physics and have a lot of work ahead of me so I could use some help. The lab setup is a wooden block sliding on a wooden surface. There is a weight attached to the block by a string that's...

Homework Statement Based on Volts and distance, calculate the max Electric Field between lines. Homework Equations The Attempt at a Solution We basically connected a 6Vdc battery to a plate containing two conductors and use a multimeter to plot the lines of flux of the field. To find...

Hi. I've been having problems finding some primary sources for my lab report for days. I've used my school's search engines, but I can't find anything appropriate to use. My report will sum up my experiment on how pH affects an enzyme's activity (catecholase catalyzing catechol and oxygen to...

Identify unkmown compound lab HELP! ok so i had to identify the unknown compound, which actually for me was Sodium carbonate. i don't know if i did this correctly because there was a lot of confusion with my lab partner (screwed me big time, couldn't even count drops; i will be getting a new...

Homework Statement We are to use the Ramp: Forces and Motion simulator located at http://phet.colorado.edu/en/simulation/ramp-forces-and-motion. First part we are to chose 2 objects. I chose the small crate and textbook and then slide then down a ramp at 30 degree angle. Using the...

Homework Statement So, our lab entails the students launching a projectile at a certain angle into a cup at a certain distance away. The launcher is 37 cm off of the ground and the cup is 7cm of the ground, so the Dy = 37-7 = 30cm. We will be given the angle in class and will be asked to...

Homework Statement Darts Lab: In lab, my group threw 100 darts and the class had a total of 1000 darts thrown. The target was between bins 24 and 25 I calculated all of the following: Table IIa: (mean of means) = 24.80 (standard deviation of the means) = 0.48 
(a) Compare (the...

So we did a lab in school on what is the effect of flour on slime which is mixed with borax and glue on the length it can be stretched. I have completed the experiment and found out it stretched much longer than the control variable with is normal slime without flour. I finish writing my...

Homework Statement Compute values for the electric field at four different points on the point-line plate. Comment on the validity of your values. Homework Equations E = F/q ΔV = ∫E dot ds The Attempt at a Solution I have attached 3 electric field maps that I did in the lab and...

Check my "Throw the Ball" lab. (2D kinematics, force, work) Here I have a lab, with explanation, questions and my worked out answers (tried to make it as neat as possible with all the formulas I use, lowercase letters are subscript letters). Can someone carefully check my math for all this? I...

I am trying to get the calculations and the data to match up in lab. The boiling point elevation predicted by the equation does not match up to the one I am getting by direct measurement. What am I doing wrong?

Do professors push most of their lab work onto graduate students and focus on grant proposals? How does the answer differ for assistant professors, associate professors, and full professors?

Lab part I: We had to work with resonators. Huge box! Lowered a solid glass sphere into the box and measured the distance from the lid to the sphere. Varied the distance and measured the resonance frequency at the varies distances. Q: ∆f =f(at distance x) - fr , fr = resonance frequency of the...

Homework Statement This is from a lab. Part 1 of the Lab: We started out by hanging a spring vertically and attaching different weights to the spring. The mass of each weight along with the relative mass were given. Once the spring reached equilibrium, we measured the elongation and...

Ok so I have my AA in General Studies, Science Emphasis and I applied for and have scheduled an interview for a job entitled Science Lab Tech out at my local community college where I graduated. I know the interview will be with a commity and I have been told that I won't be able to fake any...

Homework Statement What should happen to the electrons in a insulated metal object when a negatively charged plastic rod is brought near the insulated metal The Attempt at a Solution I thought the electrons will repel each other and the insulated object will move away from the rod...

(please help-still not solved) electrostatic force lab debate For lab, we had to do the following experiment, and me and my friend are not agreeing as to whether we have correct data: We had to charge a ball, then while holding that ball, bring it to a similarly charged ball that was hanging...

I've read many job postings at several DoE national labs in the United States, especially those dealing with Nuclear Science and Technology. Most of the postings state that they require someone with either a Nuclear Engineering or (Nuclear) Physics degree (or equivalent...I'm guessing some kind...

Hello! Im working on a design lab but need a little help on making it simple enough to use materials you would find in a standard physics classroom. Purpose: To develop a testable question that examines the relationship between 2 variables governed by the law of conversation of Energy...

1. I need some help with a Lab that's due tomorrow For the lab a spark table was set-up flat, and one puck was shot at another. Using the dots that were on the paper, I managed to figure out the time and distance of Both the pucks before and after their collision. I was also able to calculate...

Homework Statement Create a lab that proves the buoyant force equation; on a separate sheet of paper That is the directions Homework Equations F = pvg The Attempt at a Solution We haven't done anything to do with buoyancy, this is extra credit. I'm not sure what to do.

Any ideas what the inherent flaw in this experiment is? Homework Statement In the lab (actual lab), we combined copper(II) sulfate pentahydrate with barium nitrate to form barium sulfate (precipitate). Every group got a 115% or higher yield than stoichiometry would predict. Ba(NO3)2 +...

Hi! I need help and please do not delete this! What I need help with i cannot put into the template provided. I am sorry but I need help with a lab report. PLEASE I AM BEGGING YOU TO NOT DELETE THIS BECAUSE IT DOES NOT FOLLOW THE TEMPLATE! I REALLY REALLY NEED HELP! I need to find the...

I have to create a test harness for a lab. Part of the procedure is the pulling of a wire in tension. That is, the wire, when pulled, exerts resistance and thus will revert back to its original position when there is insufficient force pulling on it. I have to find a way to keep the wire in...

Hypothesis: The hottest part of the flame can be found at x located just above the u un burn gas Aim: By placing a thermometer at different points on a non luminous flame to verify the hottest part of the flame.

Homework Statement During a lab experiment my partner and I measured the average (taken from 6 measurements) time it took for 1 litter of liquid hellium to evaporate with and without adding heat to the system. We find out that without heating it took 54.16 seconds for 1 litter of hellium to...

Homework Statement It is actually not homework, but I found it is cool to solve it in Scilab, and I think that it is more proper to ask it here write the codes for (please read the picture)Homework EquationsThe Attempt at a Solution u=1.256637061*10^-6 N=320 R=0.136/2 a=2*R Z= [-0.17 -0.15...

Hi In lab classes today I worked with diffraction gratings, but there is one thing I can't quite seem to understand. If we deal with ruled diffraction gratings, then they are blazed at angle such that the first order is reflected back at the same angle as the incident angle with a specific...

I'm not sure if this is the right place to post this, but it seems to be the best fit. Homework Statement I'm trying to write a lab report about how resistance varies with temperature. I used liquid nitrogen to cool a copper coil and a semiconductor(thermistor) from room temperature to...

i am a A student in my university , and i just want to keep it that way can anyone give me an idea for reaching a perfect physics lab report and thank you

Hi I will get straight on to the problem. I want my RC servo motor to run when there is no light from 0-180 degrees and when there is light the motor should stop. I have made a program which reads the voltage from sensor and a program to generate PWM signal witha a timer sepraretly as a...

1. Homework Statement given: a large block ramp, a smaller block (one side wood, other side felt), and a stopwatch refer to this picture: http://01.edu-cdn.com/files/static/w...SLIDING_01.GIF you don't know weight, or θ but I do have the measurements for the x and y axis 2. Homework...

Homework Statement Mass m will be varied between 50-110 grams, in 20 gram increments. Homework Equations I need to find the torques of each run (50, 70, 90, then 110 grams). I already have the electronically-collected data for the linear accelerations of the masses: run 1: .050...

Colligative Properties, Freezing Point Depression -- Chemistry Lab Homework Statement In an attempt to hurry the experiment along a student did not completely dissolve the unknown nonelectrolyte. Will the freezing point depression of the solution be larger, unaffected, or smaller compared to...

Homework Statement During lab we measured the amount a spring was stretched when various masses where hung on it to verify Hooke's Law. We started with a 50 gram mass and then increased with 50 grams up until 350, for seven measurements. We then graphed the force and displacement. The lab...

Homework Statement We did a lab using a pendulum attached to a string about 1.12m long. We let it go from 20 degrees and counted 10 cycles and recorded how much time it took for the pendulum to complete 10 cycles. This lab is done assuming, there is no air resistance or any other force other...

Homework Statement I wasn't sure what section to post this in, but for my honors lab, i need to cite sources on values or theories that i include in my lab report like normal. Yet I'm having trouble finding a decent source for the speed of light and the index of refraction of air. I...

Hello there if anyone could help me out with this question I would very much appreciate it. (Note this is my first post) For my optics lab Fraunhofer(single slit) diffraction patterns were observed(measured distance to screen(x) and had readings for intensity in the y direction.) I...

Homework Statement So I have to wire the circuit and find R2 by only making another voltage measurement. We know that R3 is equal to 1000 ohms. Homework Equations The Attempt at a Solution So I was thinking that you can find the voltage of R3 and the find the current going...

The question to the lab is How can the spring constant and muzzle velocity for a toy ball launcher be determined through physical measurements and energy conservation considerations? My lab group and I took our pastic ball launchers(pretty much toy guns) and shot them straight up and measured...

Homework Statement I had a Physics lab with the following setting: A signal generator is connected to a speaker which is located on one end of a tube. This creates the sound wave. The tube is open on both ends. A micro is movable along the tube and it is connected to an occsilator which...

I have a table of these 10 readings, 149.6 150.9 149.7 147.9 147.7 152.4 149.8 152.2 153.2 148.9 They were taken on an optical bench where the smallest unit of measurement was 1mm. I'm trying to calculate the +- error but I'm not sure how to. I've came across 3 methods so far...