You opposed two rubber band chains, measuring the length of each at a variety of different tensions.

Insert a copy of your data here, along with any previously submitted work you wish to include:

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lab 1I used 2 thin rubber bands, 10 thick rubber bands, 1 push pin, and a meter stick. The objective of this lab was to find out how the thickness of the rubber bands affected the length when stretched. I took the 2 thin rubber bands and the 10 thick rubber bands and I made a chain. I then used the push pin to secure the chain to the meter stick at one end then I recorded how far the thick and thin rubber bands stretched. This is the data I collected.

10 Thick(cm) 2 Thin(cm)

73 14

74 16.5

75 17.5

76 19

77 19.75

78 21.5

79 22.75

80 24.75

81 26.5

82 28

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What is the slope of your graph of thin vs. thick rubber band lengths?

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The slope is 1.5

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By how much does your graph deviate from linear?

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If the slope is 1.5 then it is slightly off because to be linear the slope must be 1. I was roughly 67% off being linear.

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If you fit a good smooth curve to the trend of your data points, does its slope appear to increase or decrease?

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When I apply a smooth curve my slope seems to be decreasing which would make since because a rubberband would have the greatest stretch during the first half and then the stretch would be very small.

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If you fit a good straight line to your first three data points, what is its slope?

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The slope is 1.75

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If you fit a good straight line to your last three data points, what is its slope?

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The slope of my first three data points is 1.75

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If your chain of thin rubberbands was half as long, what would you expect the slope of the graph to be?

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I would think the change would greater in the beginning but the slope would be greater at the beginning and then the slope would be very small closer to the end.

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You need to include the thought process you used to come to your conclusions, how you visualized the situation, the nature of any calculations that entereed into your answer, and where possible to give a quantitative answer.

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How long would the chain of thick rubberbands have to be to result in a slope of 1?

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By calculations the thick chain would need to be around 67% percent longer than twice as long as the thin rubberbands.

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My previous note applies here as well.

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If the thin rubberbands were twice as thick, how do you think that would affect the slope of your graph?

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If the thin were twice as thick then the slope would be much closer to being linear.

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... and here

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Data look good.

Your answers to some of the subsequent questions need more.

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Be sure to include the entire document, including my notes.

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