Lab Definition and 1000 Threads

I need to design a procedure for this lab. I measured the mass of a couple of bags containing the same object in random amounts. Without looking at how many objects are in the bag i have to determine the mass of one object. At first i thought that since each mass measured should be a...

Homework Statement For a lab in Physics C, we're supposed to find the muzzle and impact velocity of a dart gun. We found x-distance, y-distance, and angle fired at, however, we were not allowed time. Our teacher wants us to graph data that is important, but I don't see how a graph would be...

In my lab for physics we are given a ramp, some textbooks, and a marble. The objective of the lab is to make the marble go through two hoops (the hoops are about an inch and a half wide, the marble is about 3/4ths of an inch). Our teacher is going to give us either a specific distance from the...

Homework Statement Suppose that a quadratic fit to a position plot yields the following fit result: y=4.97x^2+1.53x+.0503, how would I determine the accelearation due to gravity? Homework Equations I know that y=1/2gt^2+Vnaught(t)+ynaught. I know that g is 9.87m/s^2. So in my...

I did a lab earlier this week on Newton's second law with a pulley and carts. M2 was the block that traveled horizontally and M1 was the hanging mass. The mass of the cart that was moving horizontally was constant all experiment with about 0.2 kg. The mass of the hanging gradually increased...

Hello all I want to buy few equipment. I want to set up my lab and start developing AC/DC converters. I have few years of experience but as I have worked in large company I don't know which is the cheap substitute for following equipment. I would like to have 1) A power Supply- I have...

I have to conduct a lab concerning inverters. I'm using a 7404 hex inverter IC, 6 LED's with 150Ω resisters, and 1 logic switch. Can someone tone it down a little bit so I can undersetand what the lab is wanting me to do? And what does the image on the second page show (Figure 3-7 and 3-8)...

Homework Statement This is more of a general question but it is part of my physics course so i decided to post here, I am sure many of you have done this lab but what it is is a cart with tickertape attached to it going down a ramp, once we plot a d-t graph there are lots of application...

I have looked everywhere to find a simple, easy test to find whether a wave is longitudinal or transverse, I've read my textbook and I think it may be to do with polarisation but I am not quite sure how, or someone said that passing the wave through a vacuum would determine the type of wave. any...

I'm an astronomy teacher on a very tight budget. Before I really get into the meat of astronomical information, I want to make sure that my students have some understanding of WHY it is that we know what we do about astronomical bodies, and that means getting them to work with some of the tools...

This online chemistry lab won't accept my answer, WHY? Homework Statement Ok, I'm doing this lab, and it won't accept my answers. I can garuntee you that they're correct. Maybe I'm typing them in wrong? I've missed soo many attempts, I look at what the system says, but it says the answer is...

I'm curious if I'm doing this chemistry lab correctly or not. If you open the link below, you can see the lab. Basically, my job right now is to write a well formulated procedure on how to perform this lab. So, for this lab, am I supposed to be calculating the mass of the substance (h2o in...

So I'm still in the process of deciding my schedule for this semester. So far I know I'm taking: Introductory E&M Classical Mechanics (junior level) Advanced Linear Algebra Introductory Differential Geometry. I need a fifth course but can't decide which one to do this semester. I'm...

I am in the process of building a small furnace aimed at technical ceramics work, and I would like to use a carbon crucible. The carbon crucible's limit temperature is ~ 430 C in an oxidizing atmosphere and ~ 2800 C in a neutral atmosphere. My plans are to have the furnace vent to atmosphere so...

Dear all, In this coming fall, I will be assigned Physics Lab as a teaching assistantship. Does anyone know a book or any other resource that can help me in mastering physics lab challenges. I need a book on measurements and instrumentation where i can find data manipulation techniques. Does...

I've seen some threads on PF discussing the labs in physics, engineering, and chem, and something just seems.. off. People are talking about how their lab reports are ten or twenty pages long, handwritten, and/or take many many hours. This doesn't seem to jive with my own lab experience. I...

I'm an undergraduate physics student at an european university. I just finished my first year. I really enjoyed all the courses I took, except for a lab class (the only I had) in which I don't think I learned much. I have an option to get involved in math or lab research; not both since I don't...

Homework Statement To examine a particular blood sample in biology lab, a student uses a compound microscope set to have a magnification of -4530. The objective and eyepiece are both attached to a tube which is 18 cm in length and the eyepiece has a focal length of 2.62 cm. The near point of...

Homework Statement An alpha particle enters a uniform verical magnetic field of 1.0 T with a velocity of 2.0m/s East. a) Find the force exerted on the particle by the field. b) Find the acceleration of the particle. c) Find the radius of curvature of the path of the particle. Homework...

In this investigation I had to calculate my maximum power as I run up a flight of stairs. These are a few questions that I have for my lab. I want to know if my calculations are right. Given: 1. mass: 70kg 2. h = 1.17m 3. d= 1.78m 4. t = 2.02s Use the information from 1 and 2 to...

Homework Statement I have a graph with the radius on the x-axis and Fc on the y axis. I had to then calculate the slope of this linear relationship. I did that, and I got 0.17. The problem is that I don't know what this represents. mass? acceleration?? Homework Equations Fc = m4π^2rf^2...

I am undecided between these two for 2012 spring term (my last semester hopefully)

Hello, Im planning to take Organic Chemistry I with Lab, Cellular and Molecular Biology, Physics I with Lab, Microeconomics Honors, and English (Lit). I currently hold a 4.0 GPA and wouldn't like to demolish this :D . Is this too much of a load where it will be impossible to obtain A's in all...

Lab Partners--is it always like this, or is it just me? This is something that has been in the back of my mind which is coming to the forefront as the semester goes on, and that is my experience in labs with lab partners--and I wonder if I am the source of the problem. I notice that in...

Homework Statement It is supposed to be a glycol with a formula of C6H14O2. The H NMR integrations are 6H and 1H as indicated on the H NMR. The IR: http://imageshack.us/photo/my-images/90/18155707.jpg/ The H NMR: http://imageshack.us/photo/my-images/155/hnmr.jpg/ Homework...

Lab yeast go multicellular!? http://www.newscientist.com/article/mg21028184.300-lab-yeast-make-evolutionary-leap-to-multicellularity.html awesome?

What are some tricks you have up your sleeve in the lab that they really don't teach you in any book and that you can only gain through experience in the lab? -One of my favorites is when you take an impure organic compound, put it in a flask with hexanes, and spin it on a warm water bath...

Hello, when I finish school I will have an MS in nuclear engineering with second majors in both applied math and physics. I was wondering, if I get a job at a national lab, what will my prospects be vs. someone entering with a phd? After some time there will I be able to do the same work that...

So I have to design any physics experiment using Box of Matches. Can anyone help me out ?

Hello Everybody, I am going to build an optical lab. to characterize semiconductors which have a luminescence over a wide range 200 nm - 1500 nm. I hope to have a setup which flexible to carry more than spectroscopic technique and be able to study this wide spectral range. I would...

Hi, I just register to this site. I'm reading a famous classical mechanics textbook. and it state that 'Since the spatial momentum in the C-O-m frame is zero, there is clearly more energy, p0, in this frame than in the laboratory frame.' I think the energy in the center of momentum(C-O-M)...

This is Grade 12 Physics lab assigned to me : Bonus: Performing the lab+making a conclusion to answer the research question. I thought whole day but can't think of any research question with box of matches. Could anyone please help me out with this?

Hi :smile: While helping me with the queries please don't forget that I'm a beginner to this technical stuff (or, my knowledge of this area of knowledge is nothing more than beginner's! :) ). I'm trying to understand how simple lab current source and voltage source works without getting...

HELP! My son Is a senior in high school and has been accepted by a wonderful university. Unfortunately,he has been out ill for most of the semester. We are proceeding on the assumption that he will be able to go to the university in August but, just in case he can’t, I think we should have an...

Homework Statement Hi! We did a resonance lab using a closed air cloumn and 3 different tuning forks, each with different column lengths and i collected the data as follows: frequency(hz) column length(m) # of wavelengths wavelength(m) speed of sound air temp 384...

Homework Statement Hi guys, We did a lab experiment in school, where we attached some weights to a hanger, and attached this to a pulley, for each weight attached, we dropped the weight hanger and recorded the time taken for the weight to pass through a sensor, this sensor system made use...

Hi! Last Week we did a Physics lab on Speed of Sound. Two wooden sticks were banged against each other at a distance of 100 m from the wall(Then we went to 200 m, 300m and finally 400m) and the echo was heard and time was measured using a stopwatch. It was a rainy day. Can anybody suggest me...

Homework Statement So I have this lab and I have no idea how to come about doing this. An Atwood machine consisting of two massless pulleys (one smart pulley without friction and one pulley with friction) and hanging masses will be provided, as shown in the diagram below. you will be given...

Homework Statement This lab is supposed to be an example of Millikan's experiment using masses. We were given a huge list of masses of different samples. Each sample contained a different amount of item. Each sample contained the same sample and the individual masses are the same. There were...

I want to use MikTex to do my physics laboratory informs. The thing is I have to write the informs in spanish, and I've found that I can't use the tilde on my work, which is really bad, because I can't write it orthographically as it must be done e.g. I can't write Dinámica, but I can write...

Homework Statement http://www.austincc.edu/mmcgraw/Labs_1401/8c-Con%20of%20Energy-Pendulum-RGC-1-15-09.pdf state some errors that occurred in the lab Homework Equations The Attempt at a Solution I think it has something to do with the photogate but I am not sure.

1. we did a lab putting baking soda, citric acid, and water into a film canister and we had to find the amount of each ingrediant to give the max height when propelled by material, and once we have that we time it and the questions is to find the velocityof the canister when the propellant...

Homework Statement Calculate the Power, Efficiency, air to fuel ratio. torque-3.809Nm speed-3137.207 l/min T1 Temperature Exhaust=412.598degC T2 Temperature Ambient=19.141degC T3 Temperature Fuel=18.994degC dv/dt Volumetric Flow Air=109.954 l/min p fuel Fuel Pressure= 21.475 mbar...

Hi, Homework Statement It is in my chemistry lab course. I had 0.1g of an unknown solid that I diluted in 100ml of distilled water. Then, I took 25ml and titrated it with NaOH (Concentration = 0.0189M). To reach equivalent point (the point where concentration of NaOH is equal to the...

Hi All, I have an interview at a national lab in a few weeks and would like to know what to expect. I'll give a seminar and meet with ~9 staff members through out the day. The seminar shouldn't be problem but I'm concerned about getting overwhelmed by meeting everyone and discussing their...

She caught her hair in a lathe in machine shop: Yale Student Killed as Hair Gets Caught in Lathe (New York Times)

Homework Statement This was a LAB assignment. I need to find the specific heat capacity of a given metal (Cu in this case) in water, I have the following observations. Mass of water: 249.14g = 0.24914 Kg Initial temperature of water: 18 C Initial temperature of metal: 100 C Specific heat...

Homework Statement In our physics lab about the Coulomb's law we had an Van de Graaff Generator (VdGG) to produce a charge and we had a sphere covered with foil (a conductor) which was hang up next to the VdGG. When the VdGG produced charged the sphere was attracted to it and finally touched...

Hey guys! Long time reader, first time poster. I have a lab that I'm trying to get done in Calculus 1 and I'm having a some problems. The basic idea is to come up with 2 equations that compliment a graph and are continuous. Homework Statement You are to design a small section of a...

Homework Statement Hi I have done an experiment applying the bernoulli equation on a venturi tube, according to bernoulli the energy must remain the same. However according to my calculation the energy increases when the tube contracts up to the point of the throat. Can someone explain how...