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ineedyouubiebs

  • one year ago

I know this is not math but whatever. If the mass is 1.16 and the volume is 8.5 what is the slope?

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  1. ineedyouubiebs
    • one year ago
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    In my HW it says to find the slope it's (change in mass)/(change in volume)

  2. ineedyouubiebs
    • one year ago
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    @Luigi0210 help please?

  3. Luigi0210
    • one year ago
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    Do you know the changes?

  4. ineedyouubiebs
    • one year ago
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    What do you mean by that?

  5. Luigi0210
    • one year ago
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    Do you only have one set of values?

  6. ineedyouubiebs
    • one year ago
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    Oh no there's more. Want me to put them up?

  7. ineedyouubiebs
    • one year ago
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    Label 1) mass: 1.16 g volume:8.5 . Label 2) mass:0.98 volume: 7.2. Label 3) mass: 1.13 volume:10.0 . Label 4) mass: 0.69 volume: 6.2. Label 5) mass: 0.83 volume:6.0. Label 6) mass:1.45 volume: 12.9. Label 7) mass: 0.88 volume: 7.9. Label 8) mass: 1.03 volume: 7.5. Label 9) mass: 0.74 volume: 5.4. Label 10) mass: 1.02 volume: 7.5

  8. ineedyouubiebs
    • one year ago
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    Sorry I couldn't lined them up well I'm on my iPad right now

  9. Luigi0210
    • one year ago
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    Uhm

  10. ineedyouubiebs
    • one year ago
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    Yeah?

  11. Luigi0210
    • one year ago
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    I got nothing, sorry

  12. kantalope
    • one year ago
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    what happens if you treat the mass as the x coordinate and the volume as the y coordinate?

  13. ineedyouubiebs
    • one year ago
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    But that'll mean graphing all 10 of them

  14. kantalope
    • one year ago
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    ya working on ti

  15. ineedyouubiebs
    • one year ago
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    @dumbcow @dan815 got any ideas how to do this?

  16. ineedyouubiebs
    • one year ago
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    @Luigi0210 don't worry(:

  17. ineedyouubiebs
    • one year ago
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    @zepdrix ?

  18. kantalope
    • one year ago
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    tryin to find a website the will plot all the points

  19. ineedyouubiebs
    • one year ago
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    Okay thanks

  20. zepdrix
    • one year ago
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    kant, use this site, it's quite good :) https://www.desmos.com/calculator

  21. kantalope
    • one year ago
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    looks like the slopes are about the same for a series of points...not sure what the question is looking for

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  22. kantalope
    • one year ago
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    thanks zepdrix i'll check that site too...the one i found called http://openstudy.com/study#

  23. kantalope
    • one year ago
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    I'm missing clone wars for this!

  24. ineedyouubiebs
    • one year ago
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    @kantalope lol my bad and how does this help me find what I'm looking for?

  25. kantalope
    • one year ago
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    typically when you are looking for slope you are looking for the change in whatever based on the change in the other thing.....these changes aren't a straight line. what else does the question have?

  26. ⒶArchie☁✪
    • one year ago
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    it is a bit confusing that a slope can be asked when mass and volume are given. However, if the slope is meant to mean density, then I will say the slope= mass/volume.

  27. kantalope
    • one year ago
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    if the data has a function we can find the variable slope based on the derivative of the function

  28. kantalope
    • one year ago
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    heh - I'll bet I'm supposed to be able to figure out this kind of problem at the end of the semester not the beginning...and the martini I just finished in not helping...

  29. kantalope
    • one year ago
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    I'm rearranging the data on the graph...

  30. ineedyouubiebs
    • one year ago
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    http://mcpchemistry1.wikispaces.com/file/view/HW4%20-%20Density%20Graph%20Practice%202013-14.doc/447730728/HW4%20-%20Density%20Graph%20Practice%202013-14.doc here is my HW, the question is on the last page

  31. kantalope
    • one year ago
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    The points are all squirrely so a serious person would do some stat regression to find the mean

  32. kantalope
    • one year ago
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    Ah ha...which is exactly what the graph was finding

  33. ineedyouubiebs
    • one year ago
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    I think your looking at the wrong page, it's the very last one

  34. kantalope
    • one year ago
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    right so my pictures were plots of the data that we were given...it is all wonky

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  35. kantalope
    • one year ago
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    If we were measuring stuff that had a consistent mass to volume ratio the line would be nice and straight....the more stuff we had the more it would weigh yea?

  36. ineedyouubiebs
    • one year ago
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    Yeah it is all "wonky" ughhh this is irritating

  37. kantalope
    • one year ago
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    that's ok that is how real data works

  38. ineedyouubiebs
    • one year ago
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    Yeah, I know what your saying

  39. ineedyouubiebs
    • one year ago
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    You sure I'm not just suppose to divide or subtract?

  40. kantalope
    • one year ago
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    so our data is sloppy could mean a couple of things like the hint suggests - maybe some of the chunks we are looking at are real rocks and some are plastic fake rocks

  41. ineedyouubiebs
    • one year ago
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    Their metals

  42. kantalope
    • one year ago
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    nah if you were serious about this data you would plot it out like we did and look if it was in straight lines...if it was not you would do a process called regression to find the average slope between the plot points

  43. kantalope
    • one year ago
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    right so some of metal is real and some of it isn't or some of the metal is a different kind or you could just be kinda sloppy in measuring the volume or the mass...rounding up sometimes and rounding down others or if you have different people doing the measuring the data will get screwy

  44. ineedyouubiebs
    • one year ago
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    Becauseatfirst I taught I was only suppose to divide and ill get the answer, but apparerently not

  45. kantalope
    • one year ago
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    So for the last page you can paste in the plots in the pictures and a hypothesis is that the measurements are not consistent and that there seems to be two different trend lines in the data so there are probably two different kinds of metal in the sample with two densities regression wiki: http://en.wikipedia.org/wiki/Least_squares

  46. kantalope
    • one year ago
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    If you did just divide each set of points to get a series of numbers....I'll bet you get two sets of answers...lemme check that

  47. ineedyouubiebs
    • one year ago
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    Okay(:

  48. kantalope
    • one year ago
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    actually turns out that there are more like 3 sets of ratios - .14 is the answer to 3 samples .111 to three and .138 to three more <-- this also points to something funny with the data if the ration of volume to mass was the same all the samples would have basically the same well ratio ya ----so just dividing would show something but the graph makes it easier to see

  49. mary.rojas
    • one year ago
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    Can you explain in a different way, she cant understand

  50. kantalope
    • one year ago
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    If the samples were consistent - all made of the same stuff - if you had more stuff it would weigh more....a big gold coin has more mass (weighs more) than a small gold coin...and that change in size and mass would be consistent. A coin that is twice as big would weigh twice as much....does that make sense?

  51. ineedyouubiebs
    • one year ago
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    Yes, I do understand that thAt was one of the questions lol

  52. kantalope
    • one year ago
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    so if i started handing you coins that were twice as big but didn't weigh twice as much ...you would say "dood, you are rippin me off, these are not gold coins" that is what the first graph is showing ....there are four coins in the top line with a certain volume to weight ratio (slope) and then 6 coins in another line with a different volume to weight ratio(slope)

  53. ineedyouubiebs
    • one year ago
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    Somehow I think I'm just suppose to divide, and I'm just complicating myself!

  54. kantalope
    • one year ago
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    well number 2 on the second to last page says graph it....so there is that

  55. ineedyouubiebs
    • one year ago
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    Yeah and I already graphed it

  56. kantalope
    • one year ago
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    and the graph show some dots that make a line and some other dots that make a different line?

  57. ineedyouubiebs
    • one year ago
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    Yeah they do

  58. kantalope
    • one year ago
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    so the last question says to calculate the slope of each of those lines m= (y1-y0) / (x1-x0) if you pick any two points on the two lines you can get the slope

  59. ineedyouubiebs
    • one year ago
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    Can you do the first one as an example? Please

  60. kantalope
    • one year ago
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    ok top line the first point is (.69, 6.2) and another point on that line looks like (1.45, 12.9) would you agree?

  61. kantalope
    • one year ago
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    y1= 12.9 y0 = 6.2 x1= 1.45 x0 = .69 6.7/.76 = 8.82

  62. ineedyouubiebs
    • one year ago
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    No it's suppose to be 1.16 and 8.5

  63. kantalope
    • one year ago
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    the points on the other line are (0.74,5.4), ( 0.83,6.0), ( 0.98, 7.2), ( 1.02 ,7.5), ( 1.03, 7.5), (1.16,8.5) you can use any of those points to calculate the slope of the second line

  64. kantalope
    • one year ago
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    I started with the top line....that point is on the lower line...you can go with whatever one first

  65. ineedyouubiebs
    • one year ago
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    So I'll divide it like 1.16/8.5 correct?

  66. kantalope
    • one year ago
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    not if you want to calculate the slope like the last question asks...dividing will just get you the ratio not the slope...

  67. kantalope
    • one year ago
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    I made the graph bigger so it is easier to see the two different lines....we are looking for the slope of those two lines I think that the instructions are confusing as they ask for the change in mass over the change in volume....simply dividing is not the change....it is just the mass over the volume...in order to get the change part you have to do the y1-y0 thing

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  68. kantalope
    • one year ago
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    I hope that means you are going ...ah, I get it rather than ah @$%$ it =)

  69. ineedyouubiebs
    • one year ago
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    Ahhhh crap? Lol I think I'm complicating it more that I should that's why , but that's all

  70. kantalope
    • one year ago
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    k gl im out its really late here

  71. ineedyouubiebs
    • one year ago
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    Yeah get some sleep goodnight

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