1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Physics help please - Sources of error in lab experiments

  1. Aug 28, 2012 #1
    Physics help please -- Sources of error in lab experiments

    Ok so i need some help with a few labs.. some i've tried out and a few i just cant get.. what i want to know is whether the limitations and sources of errors that i wrote down for each of these labs are correct or not and what i could have said instead. Thank you for your help in advance.

    Sources of errors for center of gravity of an irregular shaped object:
    -environmental error: when the wind blows it may remove the irregular shaped object from equilibrium.
    - (i couldnt think of a next one)

    sources of errors for density column:
    - parallex error: when pouring the liquid into the container, the container should be on a flat surface and poured with eyes at an eye level or at 90 degrees.
    - do not pour liquids along the side of the container to avoid mixing

    limitations for density column:
    -pouring should be gentle to avoid the mixing of the liquids
    - try tilting the container a little so that the liquid you are adding runs down the side more slowly

    sources of errors for rate of conduction of heat in copper, nickel, tin, brass and aluminium:
    -human reaction time error: was slow when timing the exact time the match stick fell
    - mechanical error: electrical glitches when using the stop watch

    sources of errors for thermal expansion of ball and ring:
    - mechanical error: electrical glitches when using the digital vernier caliper
    -(i could not think of another one)
     
  2. jcsd
  3. Aug 28, 2012 #2
    Re: Physics help please

    Sources of errors for center of gravity of an irregular shaped object:
    -environmental error: when the wind blows it may remove the irregular shaped object from equilibrium.
    - (i couldnt think of a next one)

    add: density variations, shape variations 'say, thickness], in ability to measure precisely, inability to compute precisely....

    sources of errors for density column:
    - parallex error: when pouring the liquid into the container, the container should be on a flat surface and poured with eyes at an eye level or at 90 degrees.
    - do not pour liquids along the side of the container to avoid mixing

    add: density varies slightly with height, with temperature, with atmospheric pressure,

    limitations for density column:
    -pouring should be gentle to avoid the mixing of the liquids
    - try tilting the container a little so that the liquid you are adding runs down the side more slowly

    sources of errors for rate of conduction of heat in copper, nickel, tin, brass and aluminium:
    -human reaction time error: was slow when timing the exact time the match stick fell
    - mechanical error: electrical glitches when using the stop watch

    add: impurities in metals, measurement instrument variations, different ambient temperatures,varying ambient temperatures, thickness/size of metals,

    sources of errors for thermal expansion of ball and ring:
    - mechanical error: electrical glitches when using the digital vernier caliper

    variations in temperature of heat source...location of ball ring wrsp to heat source; cooling while measuring, ambient condition variations,
     
  4. Aug 28, 2012 #3
    Re: Physics help please -- Sources of error in lab experiments

    thank you very much for your help.. by the way are those i came up with okay?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Similar Discussions: Physics help please - Sources of error in lab experiments
Loading...