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Fanduekisses

  • one year ago

HELP WITH MEASUREMENTS? Was there a typo or mistake in this problem?

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  1. Fanduekisses
    • one year ago
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    I'm supposed to make measurements but the values decrease?

  2. Fanduekisses
    • one year ago
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    It makes no sense to me.

  3. triciaal
    • one year ago
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    are you just reading? i see 1.2, 6.65, 12.09

  4. Fanduekisses
    • one year ago
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    Yes, but are the cylinders upside down?

  5. Fanduekisses
    • one year ago
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    Why does it go from greatest to least?

  6. imqwerty
    • one year ago
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    yes the value can decrease because of cohesive forces :)

  7. welshfella
    • one year ago
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    weird!!

  8. Fanduekisses
    • one year ago
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    But are the numbers in a measuring cylinder in that order?

  9. imqwerty
    • one year ago
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    maybe :) |dw:1440966180005:dw|

  10. triciaal
    • one year ago
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    where/what is the complete question?

  11. triciaal
    • one year ago
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    I think the idea is to make sure you read at the bottom of the meniscus

  12. Fanduekisses
    • one year ago
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    It's from my intro to chemistry course, measurements and significant figures lesson.

  13. triciaal
    • one year ago
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    so you are just identifying what each unit mark means

  14. Fanduekisses
    • one year ago
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    So is it 2.2 mL, 0.4 mL, and 0.9mL?

  15. Fanduekisses
    • one year ago
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    nvm idk

  16. Fanduekisses
    • one year ago
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    nvm idk

  17. triciaal
    • one year ago
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    where did you get those values?

  18. Fanduekisses
    • one year ago
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    I looked at the greatest number... and subtracted.. but nvm I'm just so confused, do you understand this?

  19. triciaal
    • one year ago
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    take a deep breath

  20. triciaal
    • one year ago
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    applying this to chemistry I still think you are just learning to read at the bottom of the meniscus and to identify the value

  21. triciaal
    • one year ago
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    look at the first one

  22. Fanduekisses
    • one year ago
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    ok 1.2

  23. triciaal
    • one year ago
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    the bottom of the curve (the meniscus) is at the second marker and each marker is 0.1 so the measurement is 1 + 2*.1 = 1.2

  24. Fanduekisses
    • one year ago
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    But why are the numbers in that order?

  25. Fanduekisses
    • one year ago
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    Was it a typo?

  26. triciaal
    • one year ago
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    the 2nd one the "line is between the .6 and the .7 and we have 6 whole units reading is 6 + 0.6 + 0.05 = 6.65

  27. Fanduekisses
    • one year ago
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    ok

  28. Fanduekisses
    • one year ago
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    So it doesn't matter how it looks? I'm sorry if I'm sound obsessed but I was just confused because in real life a graduated cylinder looks different. lol

  29. triciaal
    • one year ago
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    no I think we read right side up

  30. Fanduekisses
    • one year ago
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    Thanks ^_^

  31. triciaal
    • one year ago
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    I can't go back that far to think what a measuring cylinder in the lab looks like sad

  32. triciaal
    • one year ago
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    do you see why the last reading was not 0.9 but 0.09 for the partial?

  33. Fanduekisses
    • one year ago
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    Because it doesn't touch the line? it looks like there is a space of about 0.01 between?

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