course Phy 122 I dont know if I answered all the questions, I ran it twice and both times when I got to the same question, it told me subscript out of range, error 9
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14:24:49 Most queries in this course will ask you questions about class notes, readings, text problems and experiments. Since the first two assignments have been experiments, the first two queries are related to the experiments. While the remaining queries in this course are in question-answer format, the first two will be in the form of open-ended questions. Interpret these questions and answer them as best you can.
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RESPONSE --> The queries will be about the assignments and experiments
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14:27:37 Suppose you measure the length of a pencil. You use both a triply-reduced ruler and the original ruler itself, and you make your measurements accurate to the smallest mark on each. You then multiply the reading on the triply-reduced ruler by the appropriate scale factor. Which result is likely to be closer to the actual length of the pencil? What factors do you have to consider in order to answer this question and how do they weigh into your final answer?
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RESPONSE --> The origninal ruler. I think this because using the tripley-reduced ruler leaves more room for error, because how do you know if it is to scale after reducing the size, also, taking that measurement and multiplying it by 3 leaves room for error because if it wasnt exact, multiplying it by three will increase your error by three. You need to consider the scale accuracy and error and how error increases as you change your number confidence assessment: 3
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14:29:01 Answer the same question as before, except assume that the triply-reduced ruler has no optical distortion and you know the scale factor accurate to 4 significant figures.
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RESPONSE --> If that is the case, it would probably be the same, the only difference I could possibly state would be it would be harder to see the exact spot on the triply-reduced, thus might cause problems, but other than that if it were to scale, it should be as accurate. confidence assessment: 2
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14:34:11 Later in the course you will observe how the depth of water in a uniform cylinder changes as a function of time, when water flows from a hole near the bottom of the cylinder. Suppose these measurements are made by taping a triply-reduced ruler to the side of a transparent cylinder, and observing the depth of the water at regular 3-second intervals. {}{}The resulting data would consist of a table of water depth vs. clock times, with clock times 0, 3, 6, 9, 12, ... seconds. As depth decreases the water flows from the hole more and more slowly, so the depth changes less and less quickly with respect to clock time. {}{}Experimental uncertainties would occur due to the optical distortion of the copied rulers, due to the the spacing between marks on the rulers, due to limitations on your ability to read the ruler (your eyes are only so good), due to timing errors, and due to other possible factors. {}{}Suppose that depth changes vary from 5 cm to 2 cm over the first six 3-second intervals. {}{}Assume also that the timing was very precise, so that there were no significant uncertainties due to timing. Based on what you have learned in experiments done in Assignments 0 and 1, without doing extensive mathematical analysis, estimate how much uncertainty would be expected in the observed depths, and briefly explain the basis for your estimates. Speculate also on how much uncertainty would result in first-difference calculations done with the depth vs. clock time data, and how much in second-difference calculations. {}{}How would these uncertainties affect a graph of first difference vs. midpoint clock time, and on a graph of second difference vs. midpoint clock time? {}How reliably do you think the first-difference graph would predict the actual behavior of the first difference? {}Answer the same for the second-difference graph. {}{}What do you think the first difference tells you about the system? What about the second difference?
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RESPONSE --> I would use the single-reduced ruler, I feel it would leave less room for error due to spacing between makes on the ruler, nd optical distortion. If you have uncertainty, it will increase as you find the first difference and it will increase as you find any other number from that information. If there is error in the answer, the more you derive from that answer the more your uncertainty increases. confidence assessment: 2
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14:35:43 Suppose the actual second-difference behavior of the depth vs. clock time is in fact linear. How nearly do you think you could estimate the slope of that graph from data taken as indicated above (e.g., within 1% of the correct slope, within 10%, within 30%, or would no slope be apparent in the second-difference graph)? Again no extensive analysis is expected, but give a brief synopsis of how you considered various effects in arriving at your estimate.
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RESPONSE --> I figure you should be able to find the slope within 1% error, because if your information is correct, or near correct, the marginal error should not be that different, allowing you to find within 1% error of the slope. confidence assessment: 1
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course Phy 122 I dont know if I answered all the questions, I ran it twice and both times when I got to the same question, it told me subscript out of range, error 9
......!!!!!!!!...................................
14:24:49 Most queries in this course will ask you questions about class notes, readings, text problems and experiments. Since the first two assignments have been experiments, the first two queries are related to the experiments. While the remaining queries in this course are in question-answer format, the first two will be in the form of open-ended questions. Interpret these questions and answer them as best you can.
......!!!!!!!!...................................
RESPONSE --> The queries will be about the assignments and experiments
.................................................
......!!!!!!!!...................................
14:27:37 Suppose you measure the length of a pencil. You use both a triply-reduced ruler and the original ruler itself, and you make your measurements accurate to the smallest mark on each. You then multiply the reading on the triply-reduced ruler by the appropriate scale factor. Which result is likely to be closer to the actual length of the pencil? What factors do you have to consider in order to answer this question and how do they weigh into your final answer?
......!!!!!!!!...................................
RESPONSE --> The origninal ruler. I think this because using the tripley-reduced ruler leaves more room for error, because how do you know if it is to scale after reducing the size, also, taking that measurement and multiplying it by 3 leaves room for error because if it wasnt exact, multiplying it by three will increase your error by three. You need to consider the scale accuracy and error and how error increases as you change your number confidence assessment: 3
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14:29:01 Answer the same question as before, except assume that the triply-reduced ruler has no optical distortion and you know the scale factor accurate to 4 significant figures.
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RESPONSE --> If that is the case, it would probably be the same, the only difference I could possibly state would be it would be harder to see the exact spot on the triply-reduced, thus might cause problems, but other than that if it were to scale, it should be as accurate. confidence assessment: 2
.................................................
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14:34:11 Later in the course you will observe how the depth of water in a uniform cylinder changes as a function of time, when water flows from a hole near the bottom of the cylinder. Suppose these measurements are made by taping a triply-reduced ruler to the side of a transparent cylinder, and observing the depth of the water at regular 3-second intervals. {}{}The resulting data would consist of a table of water depth vs. clock times, with clock times 0, 3, 6, 9, 12, ... seconds. As depth decreases the water flows from the hole more and more slowly, so the depth changes less and less quickly with respect to clock time. {}{}Experimental uncertainties would occur due to the optical distortion of the copied rulers, due to the the spacing between marks on the rulers, due to limitations on your ability to read the ruler (your eyes are only so good), due to timing errors, and due to other possible factors. {}{}Suppose that depth changes vary from 5 cm to 2 cm over the first six 3-second intervals. {}{}Assume also that the timing was very precise, so that there were no significant uncertainties due to timing. Based on what you have learned in experiments done in Assignments 0 and 1, without doing extensive mathematical analysis, estimate how much uncertainty would be expected in the observed depths, and briefly explain the basis for your estimates. Speculate also on how much uncertainty would result in first-difference calculations done with the depth vs. clock time data, and how much in second-difference calculations. {}{}How would these uncertainties affect a graph of first difference vs. midpoint clock time, and on a graph of second difference vs. midpoint clock time? {}How reliably do you think the first-difference graph would predict the actual behavior of the first difference? {}Answer the same for the second-difference graph. {}{}What do you think the first difference tells you about the system? What about the second difference?
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RESPONSE --> I would use the single-reduced ruler, I feel it would leave less room for error due to spacing between makes on the ruler, nd optical distortion. If you have uncertainty, it will increase as you find the first difference and it will increase as you find any other number from that information. If there is error in the answer, the more you derive from that answer the more your uncertainty increases. confidence assessment: 2
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14:35:43 Suppose the actual second-difference behavior of the depth vs. clock time is in fact linear. How nearly do you think you could estimate the slope of that graph from data taken as indicated above (e.g., within 1% of the correct slope, within 10%, within 30%, or would no slope be apparent in the second-difference graph)? Again no extensive analysis is expected, but give a brief synopsis of how you considered various effects in arriving at your estimate.
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RESPONSE --> I figure you should be able to find the slope within 1% error, because if your information is correct, or near correct, the marginal error should not be that different, allowing you to find within 1% error of the slope. confidence assessment: 1
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