course phy 201 ??~???o???????assignment #001001.
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10:11:54 Explain in your own words how the standard deviation of a set of numbers is calculuated.
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RESPONSE --> It is calculated by looking at what the numbers are and what the average change is with those numbers. confidence assessment: 1
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10:13:36 Explain in your own words the process of fitting a straight line to a graph of y vs. x data, and briefly discuss the nature of the uncertainties encountered in the process. For example, you might address the question of how two different people, given the same graph, might obtain different results for the slope and the vertical intercept.
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RESPONSE --> Well it is is a line of best fit it is up to the person doing the line of best fit to find what they believe is the best line. Then solve for the slope and this may be different because of the line that they have drawn. confidence assessment: 2
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10:15:14 Briefly state what you think velocity is and how you think it is an example of a rate.
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RESPONSE --> Velocity is the way that science finds how fast an object is displaced over time. confidence assessment:
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10:19:02 ** A rate is a change in something divided by a change in something else. This question concerns velocity, which is the rate of change of position: change in position divided by change in clock time. **
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RESPONSE --> I hit enter after I gave velocity self critique assessment: 2
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10:36:43 Given average speed and time interval how do you find distance moved?
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RESPONSE --> you multiply the two together confidence assessment: 3
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10:36:53 ** You multiply average speed * time interval to find distance moved. For example, 50 miles / hour * 3 hours = 150 miles. **
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RESPONSE --> ok self critique assessment: 0
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10:38:12 Given average speed and distance moved how do you find the corresponding time interval?
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RESPONSE --> distance moved/ average speed confidence assessment: 3
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10:38:20 ** time interval = distance / average speed. For example if we travel 100 miles at 50 mph it takes 2 hours--we divide the distance by the speed. In symbols, if `ds = vAve * `dt then `dt = `ds/vAve. Also note that (cm/s ) / s = cm/s^2, not sec, whereas cm / (cm/s) = cm * s / cm = s, as appropriate in a calculation of `dt. **
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RESPONSE --> ok self critique assessment: 0
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10:38:37 Given time interval and distance moved how do you get average speed?
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RESPONSE --> distance/time confidence assessment: 3
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10:38:45 ** Average speed = distance / change in clock time. This is the definition of average speed. For example if we travel 300 miles in 5 hours we have been traveling at an average speed of 300 miles / 5 hours = 60 miles / hour. **
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RESPONSE --> ok self critique assessment: 1
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