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course Phy 121
Answer the following:Which is longer, one cm_d or one cm_s?
**** 1 cm_s
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Which is longer, one cm_s or two cm_t?
**** 1 cm_s
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It is likely that your answers to the following will be in the form of decimal numbers. Give your results to three significant figures:
How many cm_t make a cm?
**** 3 cm_t
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How many cm_t would a measurement of 3 cm be?
**** 10 cm_t
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How many cm would a measurement of 13 cm_t be?
**** 4.2 cm
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Does it depend on where on the ruler the measurement is made?
**** No, rulers should be made as a universal length. You can't have rulers with different lengths for what 1 cm would be.
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How many cm_s make a cm_t?
**** 0.78 cm_s
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How many cm_s would a measurement of 5 cm_d be?
**** 4.45 cm_s
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How many cm_d would a measurement of 11 cm_t be?
**** 7.51 cm _d
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Does it depend on where on the ruler the measurement is made?
**** No, like previously stated, the manufacturers of rulers have a common length of 1 cm, 2 cm, etc.
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Now answer the following questions about significant figures, including a brief but concise explanation.
Do you think all the significant figures in your result are appropriate? Explain.
**** I would say yes to some of them, but not to all, for the doubled and tripled rulers, I can not tell the numbers as specifically as I can in the full and singled rulers.
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To how many significant figures are you pretty sure you could answer these questions. Explain.
**** I would say that with certainty for the doubled and tripled rulers I could measure to the tenth place. For the full sized and singled rulers I could probably measure to the hundredths place due to less distortion and more clarity than the doubled and tripled rulers.
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What is the smallest number of significant figures for which the last figure would be completely meaningless? Explain
**** I would say any number past the 5th decimal place the last significant figure could be meaningless. It is hard to tell past the 5th number to make it significant, since it is such a small number.
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