How would I used error propagation to determine whether my observations of a collision conform to theory?
Q. How would I used error propagation to determine whether my observations of a collision conform to theory? Theory says that momentum (p) is conserved therefore p initial and final should be equal. Here is my experimental data: pinitial0.23 N*s Pfinal0.16 N*s Dp0.07 N*s how do I used error propagation to answer the question, "Do your results conform to theory?"
Asked by kimberlilayne - Fri Oct 23 06:46:00 2009 - Physics - 1 Answers - Comments

A. According to Theory, Conservation of Momentum leads to the fact that pinitial and pfinal are equal. In other words pinitial - pfinal = pfinal-pinitial = 0 Your experimental data gives an error of 0.07 Ns. which implies that the data you have obtained has an error of +/- 0.07 Ns. Your conservation of momentum may be either in excess(+) or in dearth(-) of a value equivalent to 0.07 Ns. Check Conservation of Momentum: Calculate pinitial - pfinal = 0.23 -0.16 = 0.07 Ns Calculate pfinal-pinitial = 0.16 - 0.23 = -0.07 Ns In either case it is observed that the conservation of momentum of your experiments, from the calculations is off by 0.07Ns which is exactly what error propogation explains with its Dp = 0.07 N*s
Answered by Vignesh - Fri Oct 23 10:36:09 2009

What are two possible sources of error for a circuit experiment in physics?
Q. It is an Ohm's Law experiment using a multimeter, and a circuit board with light bulbs, a resistor, batteries, potentiometer, wires, and springs. Please help me find two sources of error and explain why they are sources of error. Thank you.
Asked by John W - Mon May 31 17:18:24 2010 - Physics - 1 Answers - Comments

A. The biggest source is Ohm's Law is exact and the electrical components are not. The second error will occur because of minor factors which aren't included in the calculations such as circuit path and connection resistances.
Answered by LeAnne - Mon May 31 17:24:40 2010

How do I fix my lens error on my easy share C713 kodak camera?
Q. How do I fix my lens error on my easy share C713 kodak camera? Whenever I turn the camera on it says lens error 126,1,0,-7 and then it turns off. It started when I tried zooming it, then it just shut off and said that. A couple weeks ago I dropped the camera and the lens was crooked and had a different lens error but my friend managed to fix it but this one, I can't figure out how to fix. Please help.
Asked by Kellz - Sat Mar 29 21:09:12 2008 - Cameras - 2 Answers - Comments

A. Take it to a repair center, usually you can send it to kodak and they will look at it to let you know what the charge will be. www.kodak/repair.com Alex
Answered by Alex H - Sat Mar 29 21:48:22 2008

Why does the error killer cleaner start each time I start my computer ?
Q. When my desktop settings are finished displaying and the icons at the bottom, the error killer cleaner starts up. Is there a way that it can be set where it doesn't start up each time?
Asked by sweetevie - Fri Apr 27 13:34:10 2007 - Security - 4 Answers - Comments

A. If you want to remove it from your machine, try finding it under Add or Remove Programs on the Control Panel and removing (uninstalling) it. If you really still want it on your machine but don't want it starting up by itself, try turning it off in the MS Configuration utility: 1. Click on the Start button. 2. Click the Run... link. 3. In the text box, type msconfig. 4. Go to the Startup tab, see if you can find a startup item for this nuisance. If you do, deselect it. 5. Click OK. 6. Restart your machine. This may or may not do the trick. Some startup programs have more than one entry in the Startup list. Nasty programs may even not have uninstallers or may purposely have uninstallers that for some reason don't work. Good luck
Answered by - Fri Apr 27 13:47:43 2007

What is the standard error of the mean if samples of size 40 are selected?
Q. If a population has a standard deviation of 25 units, what is the standard error of the mean if samples of size 40 are selected?
Asked by - Sun Apr 24 01:41:39 2011 - Homework Help - 1 Answers - Comments

What are some possible sources of error for a titration lab?
Q. I'm doing my first "formal" lab report and i really have no clue what a possible source of error is. My teacher said that it had to be something that wasn't "human" error. Any help is greatly appreciated.
Asked by J - Sat May 3 15:55:47 2008 - Chemistry - 1 Answers - 2 Comments

A. you could say error in equipments like pipet or burete that they were not properly calibrated.
Answered by bulls eye 17 - Sat May 3 16:08:12 2008

What will you do when you discover a error in a deliverable(excel sheet,doc file) that has been sent 2 client?
Q. On the last day before Christmas vacation you discover an error in the deliverable you have to send to the client. Your team doesn't wish to work on Vacation. Chances that client will discover the error is very less. And if you tell the client about error, you might lose a big Deal. What will you do in such a situation? Consider this as an interview question,behavioral type !!
Asked by Mr.B_Star - Mon Mar 1 09:35:11 2010 - Other - Careers & Employment - 1 Answers - Comments

A. Report the error to your boss and quickly get working on an "updated" file. If they do discover it, you'll lose the deal.
Answered by Ashley R - Mon Mar 1 09:47:23 2010

My employer made error and I paid tax to wrong county. How can I get my money back?
Q. My employer said it's not their problem and they can't help me. I now owe taxes for my current county since I didn't catch this error for a full year.
Asked by c41brenda - Sun Apr 8 13:42:44 2007 - United States - 3 Answers - Comments

A. Contact the "wrong county" tax office. Does this county have a tax return? If so, file an amendment for a refund. If they do not have a tax return, find out how to request a refund directly from the county. You have to pay taxes on the current county regardless.
Answered by ninasgramma - Sun Apr 8 13:49:47 2007

How does saying something is perfect and without error make it perfect and without error?
Q. What about when countless things about it can be proven to be in error and not perfect? How does the claim that it is perfect and without error make it perfect and without error? This claim is regularly made by Christians in regard to their Bible. So, it is to those people I address this question.
Asked by - Wed Jul 14 23:49:36 2010 - Programming & Design - 2 Answers - Comments

A. You address this question to Christians who are programmers? Coz otherwise you're in the wrong section. This is Computers&Internet->Program Design. But that's OK, us programmers are all smart anyway, so we'll probably give you a satisfactory answer anyway. Essentially, the system is "perfect and without error" because it passed rigorous testing in the Quality Assurance Department. And so we release it to the customer. But obviously, the customer is not perfect nor without error, and so he'll sometimes see an error where there really isn't one. But since the customer is the one paying the bills, we'll "fix" it for him anyway. It's just a big negotiation with the High Priests of both companies to determine whether… [cont.]
Answered by Unca Alby - Thu Jul 15 00:05:05 2010

What are some sources of error in measuring the density of a solution?
Q. I recently did a lab in which I determined the density of a solution of KCl. Materials used were a funnel, 50 m L buret (to deliver the volume of KCl), and a small beaker. Now that the lab is done, I am having trouble coming up with sources of error. (NOTE: I do not mean human error, but errors that are inherent in the lab. For example, a contaminated buret would not be a source of error because we were expected to have rinsed the it before using it. An incorrectly calibrated balance would not be a source of error either.) Can anyone think of any possible sources or error? Any suggestions would be appreciated.
Asked by Shane - Wed Oct 3 17:08:54 2007 - Chemistry - 1 Answers - Comments

A. How accurately can you read the buret? The calibration marks are probably 0.10 m L or 0.05 m L and you estimate the reading to the nearest 0.01 m L. You had to make 2 readings...initial volume and final volume. The buret is probably calibrated at 20 deg C. Was the temperature of the KCl solution 20 deg C? What is the calibration accuracy of the buret? How accurately can you read the weight? (Again 2 readings...the empty beaker and the filled beaker). What is the sensitivity and accuracy of the balance?
Answered by skipper - Wed Oct 3 17:18:29 2007

What is the error code 27 when online instant messaging from a phone?
Q. My friend has Verizon, but whenever he tries to log into AIM, it gives him "Error Code 27". We don't know what it means, and we need help. Thanks!
Asked by - Sat Apr 18 10:37:29 2009 - Other - Entertainment - 1 Answers - Comments

A. Hi Mitchell I think your computer has registry problems.It is very easy to repair 27 error.Please do it step by step. To repair 27 error you need to download a registry cleaner,scan your computer and repair 27 error just 1 click. Here is an excellence registry cleaner:
Answered by Susan L - Mon Apr 20 09:06:19 2009

What is the possible causes of error in the method employed in determining the density of the unknown liquid?
Q. ok. we had this experiment and our teacher gave us an unknown liquid( but i guess it is an oil :D:D ). we are tasked to know the volume, mass and its density using the grad cylinder. afterwards, she let us compute the percent error of our experiment ( we got low accuracy) and she let us answer the questions: What is the possible causes of error in the method employed in determining the density of the unknown liquid? Why is it advisable to use non- volatile liquids in this experiment? please answer me! i need the answers badly! thanks in advance. :) please explain in full and detailed. thanks!
Asked by conan - Sat Jul 12 06:31:12 2008 - Chemistry - 3 Answers - Comments

A. You must measure volume and weight (mass) to calculate density. You must correctly observe the meniscus in the graduate to accurately measure volume, however the meniscus depends upon the unknown liquid and may vary. You must weigh the graduate alone then the liquid + graduate to determine the weight of the liquid without the graduate. Both weights may include errors unless a precision balance (compensated for the buoyancy of air!) is used. Weight may be affected by distance from the center of the earth if you are at a significant elevation above (or below) sea level. When measuring a volatile substance some may evaporate changing both mass and volume during an experiment. Matching a changed volume to the original mass will cause an error… [cont.]
Answered by Kes - Sat Jul 12 06:57:49 2008

What are sources of error that might occur during a pendulum lab?
Q. It's the lab where u set up a pendulum using a mass, clamp, and retort stand. Then u use the computer to time the speed of the pendulum. u calculate the gravitational potential energy and the kinetic energy. i am not sure what might cause error during this lab. so if u can, just list certain errors that might occur. thanks!
Asked by Jenny L - Wed Apr 21 00:32:46 2010 - Physics - 2 Answers - Comments

A. human error
Answered by - Wed Apr 21 01:24:48 2010

What type of error is it when student leaves out articles (a, an, the) in her speech?
Q. I have to analyze a student's oral speech. One error that she commonly makes is omitting articles (a, an, the) where they are needed. For example, she said "I always wanted to be doctor," and "I like movie called Halloween." What type of error would this be considered? Is it a grammatical error in sytax or would it be an error in cohesion?
Asked by ladylion215 - Sun Feb 21 13:41:38 2010 - Languages - 1 Answers - Comments

A. gramatic
Answered by - Sun Feb 21 13:42:48 2010

Er Ro R...?
Q. what is wrong with the following sentence? For the sake of argument, we're not always right! you're absolutely right!
Asked by Ms* Shae* - Mon May 14 22:07:16 2007 - Jokes & Riddles - 6 Answers - Comments

A. we're i can not believe no one else caught that, it should be-- your
Answered by legionmober - Mon May 14 22:19:00 2007

How do you find the current error from an analog meter in the circuit?
Q. I need help with this question.. If a 2-m A, 16.7 ohm movement is inserted into a circuit branch whose resistance is 1k, find the error in the indicated current values caused by the insertion of the meter. If the movement was converted into an ammeter with full-scale range of 10m A, find the resulting error.
Asked by Stellurr - Mon Feb 15 17:57:47 2010 - Engineering - 3 Answers - Comments

A. The full scale meter movement is 2 m A. 2 m A through a 1K resistance yields a voltage of 2 V. A current measurement which did not negatively load the circuit would indicate a true 2 m A current. Insertion of the meter would indicate a current of ( 2 V / 1016.7 O ) = 1.967 m A The error current is 1.967 m A - 2 m A = -33 m A The meter would register ( 1.967 m A / 2 m A ) or 98.36% of its full scale movement. From actual value, the current measurement error is 1.64% of reading. --- "If the movement was converted into an ammeter..." (scratch head) The movement already functions as an ammeter. How does this statement change the function of the movement? --- The full scale movement is 10 m A. Let's do it all again. 10 m A through a… [cont.]
Answered by - Mon Feb 15 18:35:25 2010

How to evaluate the error and accuracy of paper chromatography?
Q. When running a paper chromatography, hw can you evaluate the error (on Rf) and the accuracy of the Rf calculated? Thank you.
Asked by Val - Sat Jan 30 10:21:36 2010 - Chemistry - 1 Answers - Comments

A. to Institute for Chromatography: Information for Chromatographers, especially about analytical errors and new techniques. for Conference NEWS click onto If C-News For latest Analytical NEWS click onto u-Plc institute for Chromatography has been serving chromatographers from over 55 countries since 1972 in analytical chromatography. We specialized in correct, precise, affordable analytical data by GC, HPLC, HPTLC / u-PLC. Our top speciality is finding and reducing qualitative and quantitative systematic errors , a field about which only a very few experts are willing to work and report. However just the systematic error is most critical in all chromatography areas. And this is one topic of this virtual Institute for Chromatography:… [cont.]
Answered by husnitahahusnitaha - Sat Jan 30 13:24:07 2010

How can I display error bars with an excel bar graph?
Q. I want to display error bars (standard error of the mean) in a bar graph? I want to graph the effect of task (difficult task versus simple) on a performance measure using the bar graph function in excel. It allows me to insert error bars but it assumes the error is the same for both conditions. So, when I try to insert error bars for standard error, it assumes the standard error is the same for both conditions. It is not.
Asked by Henry B. - Mon Mar 9 21:07:12 2009 - Programming & Design - 1 Answers - Comments

A. Create another series with line chart type Then hide the line (show only the points) And add the error bars to that new series That how I did it a while ago VBAXLMan
Answered by VBAXLMan - Fri Mar 13 12:37:25 2009

What is the relative error in length of a side of the cube?
Q. Find the relative error in length of a side of the cube? How does this error propagate to the relative error in the volume of the cube? How does it propagate to the density of the cube? Find the relative errors in diameter and length of the cylinder. How do these relative errors propagate to the relative error in volume of the cylinder? How does it propagate to the density of the cylinder? What are the methods to solve this problem? I heard it uses Calculus methods? (-has taken Calc I- ) What does it mean? Can anyone give me an example with made-up measurements? Please help!! I'm just started Physics.
Asked by Fisherdedisher F - Mon Jan 21 15:15:25 2008 - Physics - 1 Answers - Comments

A. I'm not sure you stated the whole problem but let me try: Let the error in measuring the length of a side of a cube be dx. The the side length is x +/-dx. The volume is the length cubed or V = (x)^3 so the error is d V = 2x^2dx Nw density is defined as mass over volume - call density D. D = m/V The error in D is d(D)/dx = md(1/V)/dx =md(1/x^3)/dx = -3m/(x*V) or d(D) = -3m*d V/(x*V) This says that the change in desnity gets smaller as the change in volume gets larger. Do the cylinder in the same way
Answered by nyphdinmd - Mon Jan 21 15:23:35 2008

What is the significance of finding an observed error greater than the maximum accountable error?
Q. I were doing an experiment lab about pendulum, in which I found that the "observed error" of gravity is greater than the Maximum Accountable Error of gravity. How can I explain it in the conclusion part? Thanks
Asked by John - Thu Apr 24 01:39:58 2008 - Physics - 1 Answers - Comments

A. It's normally an indication that your observation was in error, or that your experimental setup is wrong. It's up to the experimenter to further check his apparatus for problems, to re-run his experiment, and to report and explain anomalous results, if he can, or devise new hypothesis and experiments to test them, as possible explanations.
Answered by PAULSC - Sat Apr 26 21:23:56 2008