Lab Definition and 1000 Threads

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...

Hello everyone, I hesitated to post in this section because I couldn't determine if it was more appropriate to post it in the electrical engineering section or in the homework one. Since this is a relatively simple project and counts as homework, I posted it here. However if I am posting in...

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...

Homework Statement So I have done a lab involving how Magnetic Field Strength varies with distance from a magnet. using a magnetic field sensor, some recording software, a meter stick a magnet. From this I gathered the fact that as distance increases magnetic field strength decreases...

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...

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...

I'm not even sure if it belongs in here... but my class is assigned to do this lab the objective is to determine that D=Vd/Va{(L1^2+2L1L2)/4d} is correct... so my teacher also want us to do 2 graphical analysis based on this formula I think i found one way of doing graphical analysis (if i...

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...

1. http://img856.imageshack.us/i/scanpic0001.png/ using tuning forks, you're supposed to choose 7 notes and find the frequency and length then find an approx speed for sound. we did this with logger pro and a USB microphone device and glass tubes. i plugged in my data to this eq'n: fn =...

Homework Statement A person is sitting and extending the knee at an angle of 45 degrees. The mass of the person is 98 kg, the lower leg length is 44 cm and the location of the weight is 40 cm with respect to the knee. Assumptions: The mass of the lower leg and foot is 5.8% of total body...

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...

Homework Statement the problem is we drew up a graph o E^-3/2(y) against Z^2(x) so the slope is [E^-3/2]/[Z^2]=m we need to rewrite equation three given that z is not equal to zero and then get a final equation like four. we need to isolate (a) so we can determine a value for it using our...