Sources of error for lab

7,269 results
  1. Physics

    Physics lab need help with sources of error. In our lab, we had to use carbon tape and a spark timer to find out the maximum velocity and maximum acceleration of a high school student. I'm having a hard time to find sources of errors. Any ideas or insights

    asked by Chris on March 17, 2017
  2. Repost bio

    hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab with sand,

    asked by InSANELY URGENT on February 27, 2008
  3. Biology Lab gr 12

    hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab with sand,

    asked by INSANELY URGENT on February 26, 2008
  4. PLEASE RESPOND!!

    Question: hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab

    asked by Rory on February 27, 2008
  5. Labs: Biology 12

    Question: hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab

    asked by Rory on February 27, 2008
  6. Chemistry

    I did a lab in chemistry about weighing table salt and sand and mixing it with water and pouring it through a funnel. One of my lab quetions was, What are some possible sources of error in this activity? First of all, I don't know what this question means.

    asked by Jennifer on August 28, 2010
  7. chemistry

    Is there a difference between sources of experimental error and sources of error? yes experimental error is when you did something wrong not on purpose though. like stopping the time clock too early or too late but not going back to fix it. sources of

    asked by Anonymous on October 16, 2006
  8. Repost Repost Bio

    I asked this, and didn't get a very helpful response. Question: hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed

    asked by InSANELY URGENT(Science teacher help) on February 27, 2008
  9. Chemistry 12

    what are the sources of error in preparing ester lab?

    asked by maggi on April 3, 2014
  10. chemistry

    I am completing a lab where I had to determine the mass percent of Mg(OH)2 in an antacid tablet , and I am trying to determine sources of error for my lab. I was wondering if when I back-titrated with NaOH after I overshot on purpose would the added OH-

    asked by Peter on October 19, 2010
  11. chemistry

    what are the possible sources of error that might lead to an erroneous determination of the concentration of the acetic acid in the titration lab?

    asked by elena on February 1, 2010
  12. Chemistry

    You are required to plan and design an investigation to test the following hypothesis Black inks from three different brands of permanent makers contains different dyes. I want to know how to go about doing this lab What Aim must be use? What is the

    asked by Confused Grace on March 23, 2010
  13. Physics HS

    Doing a physics lab on elastic material - Asked to list at least three sources of error in measurments and/or laboratory technique. I really do not understand what teacher is looking for?

    asked by Jane on October 18, 2007
  14. Chemistry

    You are a lab technician and mix with water in order to create 250 ml of a 17% salt-solution. Discuss and explain the sources of error that may be occurring in creating the mixtures.

    asked by Fatih on March 5, 2012
  15. Chemistry

    What would be the sources of error for the lab of physical properties of two types of solids. Solids used:sodium chloride and camphor With: water and 6 ml isopropyl alcohol.

    asked by Mr. Green on May 16, 2011
  16. Lab in general

    I just read my syllabus for lab and I am kind of shocked at what it says. I do know that I have to write out procedures of the lab in my nbk before coming to lab but I just read that it says "You will NOT be allowed to refer to you textbook/handout during

    asked by ~christina~ on September 3, 2007
  17. biology

    I have to do a lab report on the effect of metal ions on enzyme activity One of the questions asked the sources of error and one asked the methods used I got stuck, can you pls help

    asked by Barry on April 16, 2014
  18. Chemistry

    I did a lab today in class and part of the lab is to experimentally find the enthalpy for the dissolution of ammonium chloride by dissolving 4.0 g of NH4Cl(s) in 50.0 mL of H2O(l). I got a -5°C temperature change and calculated delta H to be 15 kJ/mol.

    asked by a Canadian on February 13, 2013
  19. Physics

    what can be the source of error in lab of forces equilibrium,force board lab?

    asked by Riana on September 26, 2013
  20. Physics

    what can be the source of error in lab of forces equilibrium,force board lab?

    asked by Riana on September 26, 2013
  21. Physics 11

    In physics we did a lab experiment that involved finding the Heat capacity. the teacher told us that we wont get an exact answer. He wanted us to state the Source of Error. what is a source of Error? He said that it isn't a "human stupidity error" eg.

    asked by Andrew on November 10, 2009
  22. Chem

    In a lab where a thermometer is used to measure temperature for a hot liquid it is possible as and error that the thermometer will cause the temperature of the liquid to cool slightly causing a observation error but how can this be fixed to minimize error?

    asked by Sherry on September 16, 2016
  23. Chemistry Help Please!!!

    What is the greatest source of error for the hydrolysis of salts and pH of buffer solutions lab?How would you minimize this source of error?

    asked by Kim on March 29, 2014
  24. chem

    experimental error is part of any experiment.suggest two possible sources of error on the experiment of the mole ratio of NaCL to that of NaHCO3.

    asked by audu on February 29, 2012
  25. Chemistry

    You are a lab technician and must create 250 ml of a 17% salt solution. You have available three stock solutions. You have a one liter container of a 5% salt, a 500 ml container of a 28% salt solution, and a 400 ml container of a 40% salt solution. Discuss

    asked by Fatih on March 5, 2012
  26. Statistics

    Blood samples from 10 persons were sent to each of two labs for cholesterol determination. The measurements are recorded below: Table 1. Serum Cholesterol measurements of Lab 1 and Lab 2 Subject Lab 1 Lab 2 1 296 318 2 268 287 3 244 260 4 272 279 5 240 245

    asked by Peter on July 21, 2014
  27. Chem

    The actual heat of formation of MgO is -601.8 kJ/mol. Convert this to kcal/mol and calculate your % error. And list two possible sources of procedural error to account for this percentage.

    asked by Danny on March 19, 2012
  28. Chemistry 12

    Hey yall! i am working on a lab where we used NaOH solid (pellets) and 1.0M of NaOH solution. i was wondering is Sodium Hydroxide a substance that reacts with the enviroment? because maybe that could be like a source of error right? so basically i am

    asked by sandie on March 20, 2007
  29. physics

    I need help coming up a source of error for this like lab thing that we are doing class. So like we took this string with a rubber ball on it and the string went through a glass tube, and on the end of the string, so the like opposite end of where the ball

    asked by Wilson on September 29, 2007
  30. Finding and evaluating sources

    1.When should you begin choosing appropriate sources for your topic? as soon as you get the assignment after the rough draft is due as soon as you have a good working thesis statement after you decide how long your essay will be Question 2 What qualities

    asked by christopher on April 27, 2010
  31. Chemistry lab

    Discuss three unavoidable sources of error in Part 1 (the synthesis of the crystals) of this experiment and identify the major factors that would explain a less- than-100% yield. Note: human error is not an acceptable answer. Was the alum not dry enough

    asked by Jake on March 2, 2016
  32. Statistics

    Hi, Could anyone help me please, because I'm not sure with my answer, Thank you so much for your help and value time. Blood samples from 10 persons were sent to each of two labs for cholesterol determination. The measurements are recorded below: Table 1.

    asked by Jonhny on July 21, 2014
  33. statistics

    Hi, Could anyone help me please, because I'm not sure with my answer, Thank you so much for your help and value time. Blood samples from 10 persons were sent to each of two labs for cholesterol determination. The measurements are recorded below: Table 1.

    asked by Jonhny on July 21, 2014
  34. AP Chem

    i always get the error analysis section of my lab wrong so i need a NON human error in an experiment involving the diffusion of gases Experiment: stick cotton ends of a Q-tip (one soaked in HCl and one in NH3) into either end of a drinking straw and

    asked by Blair on December 12, 2007
  35. Biology

    I really need help with my science lab. I was sick when we did the lab on Thursday and Friday was a snowday so I did not get to get the observations off my peers. My teacher has allowed people one more day and I do not understand this Lab at all. If

    asked by Scott on March 5, 2007
  36. Physics/Statistics

    We're actually learning propigation of error in my chem class, but it seems to be used equally as much in Physics/Stats. My teacher showed us two methods of doing it: REAL Method (Addition/Subtraction): square root[(error absolute 1)^2 + (error absolute

    asked by Amiga on September 15, 2006
  37. Physics

    A particle is moving at 0.75c relative to a lab on Earth. By what percentage is the Newtonian expression for its momentum in error, i.e., how wrong is the classical formula? (The percentage error is the difference between the erroneous and correct values,

    asked by David on September 20, 2014
  38. Physics Lab

    Hey there, I did a lab in which a wooden board was taken and then a dynamics cart was dropped down it. Four markings of different incriments were marked on the board, so that when we dropped it, we could record the time it took for the cart to reach a

    asked by Meredith on September 14, 2007
  39. physics lab

    For a physics lab, I measured length, width, thickness, and mass of 2 blocks of wood, 3 trials each. There were 2 questions on the lab that I did not understand how to do. 1. For each trial, find the ratio between the mass and the volume. Based on your

    asked by anonymous on September 1, 2006
  40. Sources of error for lab

    Hey! So I need help coming up with a source error for this lab I did. We rolled a car down a wooden board and timed the cart rolling down at different distances on the board. So far I have errors dealing with friction, the stopwatches, and the wooden board

    asked by McHelpme on September 15, 2007
  41. Chemistry

    How do you find Absolute error and how do you find relative error? Absolute error is the difference between the experimental value and the actual value. Relative error, usually expressed as a percent, is the error relative to the correct value. For

    asked by mZ. YoU on February 17, 2007
  42. grammar

    Matching. Each of the following sentences has an agreement error in it. Match the correct type of agreement error to the sentence. *The patient was placed in the wheelchair with the fractured tibia. A. Verb tense agreement error B. Subject/verb agreement

    asked by Anonymous on January 12, 2016
  43. 10th grade

    When using a calorimeter with two chambers what are the possible sources of error?

    asked by Stacey on September 7, 2010
  44. Chemistry

    The question is: What is the molarity of the copper (II) chloride solution your teacher provided? Show calculations. Obtain the true molarity of the copper (II) chloride solution and calculate percent error. I have done this so far trying to answer the

    asked by Jillian on April 23, 2013
  45. GRAMMAR

    Good Morning- Each of the following sentences has an agreement error in it. Match the correct type of agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e.

    asked by Leslie on May 13, 2011
  46. ANALYTICAL CHM

    What are the possible sources of error in using a graduated pipet? in using a buret?

    asked by jessy on September 6, 2014
  47. Chemistry please help

    An Ap student got a lab report back with "-4.5 % error" written in red on it. He had found the boiling point of an unknown liquid to be 45 C. What is the correct boiling point of his unknown liquid? I know first I would write -4.5 % error = |4.5-x|/x x 100

    asked by Taylor on September 13, 2013
  48. Chemistry

    An Ap student got a lab report back with "-4.5 % error" written in red on it. He had found the boiling point of an unknown liquid to be 45 C. What is the correct boiling point of his unknown liquid? I know first I would write -4.5 % error = |4.5-x|/x x 100

    asked by Anonymous on September 13, 2013
  49. Analytical Chemistry

    What are the most common sources of error in weighing solid samples ?

    asked by Neda on September 3, 2014
  50. Physics

    Name any Margins of error that would happen in the lab "Which path requires the most energy? (gas)

    asked by Kevin on February 6, 2017
  51. biochemistry

    i am currently doing an iodine value lab an error occured in my results and i do not know how to write up the conclusion and the discussion

    asked by amanda on November 15, 2013
  52. Sentence Agreement Errors

    What agreement error would this sentence be? One of the options concerning his future surgeries were discussed with him. Verb tense agreement error, subject/verb agreement error, pronoun agreement error, modifier placement error or parallel structure error

    asked by Becky on December 12, 2013
  53. Science

    1.How can a model be used to determine possible sources of error in an experiment and to identify questions for further investigation?

    asked by Hayley on August 23, 2011
  54. chemistry

    what are the possible sources of error that might lead to an erroneous determination of the concentration of the acetic acid?"

    asked by elena on February 1, 2010
  55. physical chemistry

    at least 6 sources of error of determining concentration quotient of FeSCN? plzzz sir

    asked by hamza on September 5, 2014
  56. Chemistry

    Experiment 10: Which Fuels provide the most heat? There are many possible sources of error in this experiment. List three that you can think of. Would each error have a large effect, a medium effect, or a small effect on the calculated heat content of a

    asked by Megan on October 7, 2010
  57. C++ Programming

    Hello. I use Visual C++ 2010 Express and don't know why this is occuring. I go into Skript.rc Push F7 to build the RC script first. Output says... Fatal error RC1015: cannot open include file 'afxres.h' Other sources tell me to replace it with windows.h

    asked by David on July 28, 2010
  58. Chemistry

    Possible Sources of error in a reaction or sodium bicarbonate and acetic acid. Also known as baking soda and vinegar.

    asked by Grace on February 25, 2014
  59. presentation essential

    dentify and evaluate the three specific credible sources of information on that topic based on the information on evaluating sources in your textbook on pages 179 – 181. Identify and discuss the criteria that were used to evaluate those three sources and

    asked by mary on April 18, 2013
  60. grammar

    The patient was placed in the wheelchair with the fractured tibia. A Verb tense agreement error B Subject/verb agreement error C Pronoun agreement error D Modifier placement error E Parallel structure error My answer is c

    asked by Marie on November 14, 2012
  61. physical chemistry

    salam.... plz give me some sources of error of determining concentration quotient of FeSCN? plzz urgent

    asked by hamza on September 5, 2014
  62. Grammar-agreement errors

    Match the correct type of agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. He complains of abdominal, neck, and chest pain

    asked by Leslie on May 13, 2011
  63. physical chemistry

    This question is about a lab called Heats of Ionic Reaction in my Physical Chemistry class. I need to know why there should be a large percentage error in deltaH4

    asked by shelby on March 5, 2013
  64. Microbiology

    How can lab practices and safety precautions help reduce hazards in a lab setting? How do you handle blood cultures and pathogenic strains in a lab to minimize contamination?

    asked by Sara on May 3, 2013
  65. english

    Choose the word needing an apostrophe or an apostrophe and an s. If the sentences is correct, choose no error. 1. Why havent you dotted your j’s? haven’t **** j’s’ no error 2. Ounce for ounce, humans aren’t as strong as most insects. human’s

    asked by jayson on November 14, 2012
  66. chemistry

    If the atmospheric pressure is not corrected for vapor pressure of water, what effect will this have on number of moles of oxygen calculated? Use numbers from your experiment and determine the percent deviation caused by this omission. Is this a

    asked by Anonymous on September 3, 2010
  67. Chemistry

    Oxygen gas and hydrogen gas are used to synthesize dihydrogen monoxide. A lab group utilizes 1.00 liters of oxygen and 1.01 liters of hydrogen to create 0.75 grams of product. How many milliliters of product should the group have expected to get? What will

    asked by Nick on May 20, 2013
  68. LAB HELP ASAP

    WHAT ARE POSSIBLE SOURCES OF ERRORS IN A COMBUSTING BIODIESEL LAB WHERE WE USED CANOLA OIL TO CREATE A SAMPLE OF BIODIESEL.

    asked by XOXOX on December 9, 2015
  69. Chemistry

    Oxygen gas and hydrogen gas are used to synthesize dihydrogen monoxide. A lab group utilizes 1.00 liters of oxygen and 1.01 liters of hydrogen to create 0.75 grams of product. How many milliliters of product should the group have expected to get? What will

    asked by Adam on May 20, 2013
  70. organic Chemistry

    In my Organic chemistry lab, the calculated enantiomeric excess was over 100% . Is this possible? and If not, what sort of error could have been made? *the observed optical rotation was read correctly

    asked by jenny on November 23, 2009
  71. chemistry, physics

    What is the most important source of error in the calorimeter experiment? I know few, but I don't know what is the most important source of error. Stirring error the calorimeter is not properly insulated Calculation error Measurement error in volume and or

    asked by miyabi on December 17, 2015
  72. healthcare

    Identify and discuss at least 2 specific sources of health care statistics. These sources can be examples of either primary or secondary data sources.

    asked by Denese on May 25, 2013
  73. Grammar-agreement errors

    Match the correct type to agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. A small laceration was on the patient's ear that

    asked by Leslie on May 13, 2011
  74. PHP Coding

    I got an error with this line. Could anyone check what's wrong? 64 define('QA_MYSQL_TABLE_PREFIX', 'QA_); the error message: Parse error: syntax error, unexpected ''); ' (T_CONSTANT_ENCAPSED_STRING) in

    asked by Anonymous on January 31, 2017
  75. ENG COMP

    List the sources you have found that you believe will be most helpful to you in preparing your final research paper. Identify the types of sources you believe will be most useful and where you intend to search for these sources.

    asked by KESHIA on October 24, 2011
  76. Chemistry- Dr.Bob222

    Is there an actual value for the buffer capacity of acetic acid? I need to know the actual value, so that I can calculate the percent error for my lab.

    asked by Nevaeh on April 25, 2016
  77. Calculus

    Suppose a cylindrical can is manufactured with radius r. The manufacturing process makes the length r imprecise; r can be off by ±0.03 cm. The manufacturing process makes the height of the can precisely equal to three times the radius r (including any

    asked by Steven on December 4, 2009
  78. Calculus

    Estimate delta(x) using the Linear Approximation and use a calculator to compute both the error and the percentage error. f(x)=cosx a=(pi/4) delta(x)=.06 delta(x)= ______ i got this part and it's -.04242 The error in Linear Approximation is: and The error

    asked by Anonymous on October 14, 2007
  79. Algebra 2: Prob and Stats

    A survey of 480 high school students found that 37% had a pet. Find the margin of error. Round to the nearest percent. Use the margin of error to find an interval that is likely to contain the true population proportion. * margin of error = +-5% interval,

    asked by Skye on May 24, 2010
  80. GYRO COMPASS

    A gyro compass is affected by 2 errors. Speed error and latitude error. I have no idea why this should be. Can anyone offer an explanation. Thank you, Mike. Since this is not my area of expertise, I searched Google under the key words "gyro compass error

    asked by MIKE on September 1, 2006
  81. Chemistry

    For an enthalpy lab, why would calculated value differ from the theoretical value (in percent error) for the heat reaction of Mg/HCl and MgO/HCl

    asked by Liz on July 21, 2014
  82. Biology

    three similar celery stalks are placed in solution of dye for 5 mins to examine diffusion in living cells. what are some possible sources of error? suggest improvements to the experimental design?

    asked by Anonymous on September 16, 2016
  83. science

    2. Alex, a fresh graduate chemical engineer, started his job by a mission requested by his boss. He was supposed to prepare a small amount of ethylene in the lab, to use it later for polyethylene synthesis. His boss, OE, also known as “The Monster” did

    asked by haha on March 11, 2014
  84. Grammar-agreement errors

    Match the correct type of agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. Although they seemed inflamed, the site of the

    asked by Leslie on May 13, 2011
  85. Chemistry

    I did a lab, an kinetics lab (iodide clock) and in my lab report I have to calculate the initial rate in mol L-1 s-1 and I'm not sure how to do that. I have the [I-] and [S2O82-] in mol L-1 already. The reagents are [KI] [NaCl] [Na2S2O3] [Na2SO4] [K2S2O8].

    asked by Dan on February 29, 2016
  86. science

    hello i need help Problem How could renewable energy sources be used in a house? Devise a Plan 1. Consider what you learned about renewable energy sources. Use what you learned to design a house that operates entirely on renewable energy sources. Focus on

    asked by austin on March 12, 2018
  87. Grammar-agreement errors

    Match the Correct agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. The restoration appear to be excellent, as do the

    asked by Leslie on May 13, 2011
  88. Chemistry

    What would be the consequence of competing equilibria, such as from other ingredients in an aspirin tablet in a titration lab results? What if there were several pain relievers in the same tablet? How could the error from these interferences be minimized?

    asked by Anonymous on March 31, 2015
  89. Science

    Problem How could renewable energy sources be used in a house? Devise a Plan 1. Consider what you learned about renewable energy sources. Use what you learned to design a house that operates entirely on renewable energy sources. Focus on three major needs:

    asked by Priscilla on April 16, 2015
  90. English

    In this sentence, is there an error in one of the lines or is there no error The hikers caught sight of deers running through the forest no error

    asked by kelley on October 10, 2014
  91. algebra 1 function question

    given functions f(x) = 3x-5 and g(x) = 1/3 - 4/3x correct the error g(-3) = 1/3 - 4/3(3) = 1/3-4 = - 3 2/3 error i believe is 3 should be -3 so g(-3) = 1/3 - 4/3(-3) 1/3- (4/3 times -3/1) = 1/3 -( -12/3)= 1/3 +12/3 = 13/4 = 4 1/3 other one: f(1) = 1/3 -

    asked by ann on January 6, 2012
  92. Calculus (answer check)

    The measurement of the radius of a circle is 16 inches, with a possible error of .25 inches. (Use differentials to approximate the possible propagated error and the percent error. Propagated error= 1.6% Percent error= 4.6%

    asked by Sarah on October 26, 2016
  93. Com 150

    Provide three credible sources from the internet for your expository essay and cite the sources in APA format. I have the three credible sources but not exactly sure how to "cite the sources in APA format." The topic is Suicide and the three subtopics are

    asked by Cherie on December 14, 2009
  94. Propagating error

    Find the absolute and percent relative error for each calc. b) 81.5 (+/- 0.5) x 40.2 (+/- 0.2)/ 21.8 (+/- 0.2) my answer for absolute error was 150. +/- 200, which is outrageous. Can someone show how they would do it so I can compare and find my mistake?

    asked by Chris on September 17, 2006
  95. English

    I need help with finding sources for my research paper. My teacher said: All of your sources should be from reputable scholarly sources, from journal articles you access via the library's online databases or from books that you access in the library.

    asked by pam on February 15, 2010
  96. English

    I need help with finding sources for my research paper. My teacher said: All of your sources should be from reputable scholarly sources, from journal articles you access via the library's online databases or from books that you access in the library.

    asked by pam on February 15, 2010
  97. human life

    The text, Psychology and the Challenges of Life discusses several sources of stress. What sources of stress did the text identify in which you were previously unaware? Has your reading helped you identify any new sources of stress? If so, how might you

    asked by Anonymous on November 13, 2009
  98. Social Studies

    I have to write a poem about life in Carribien South America today. But the problem is I can't find any good sources and credible sources, and even if I did have some I don't know how to start writing a poem. Could you give me some sources for it, and an

    asked by Joey on May 10, 2018
  99. psy

    Logical inquiry: Find two reliable sources that provide a balanced view of internal versus external locus of control. Reference these sources in your response. Ms. Sue could you help me find those sources. thanks.

    asked by rose on October 25, 2008
  100. Chemistry (check)

    12) Relative error is also called _______ I got accepted value decimal error? Relative error multiplied by 100 is called percent error. Errors are classified as relative or absolute.

    asked by Bryan on January 12, 2007