#$&*
Phy 201
Your 'question form' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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On the Physics homepage, http://vhmthphy.vhcc.edu/, under Physics I, http://vhcc2.vhcc.edu/ph1fall9/frames_pages/new_default_2.htm, in the Assts tab, http://vhcc2.vhcc.edu/ph1fall9/frames_pages/new_default_2.htm, under Assignment 0, in Introductory Problem Sets, http://vhcc2.vhcc.edu/ph1fall9/frames_pages/new_default_2.htm, Set 1, problem numbers 3 and 7 have caused concern. The problems have since changed, so I cannot give you their exact links, I'm sorry.
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Problem 3 asked about an object moving at a rate of .000456 m/s for 2.5221 s. How far would the object move? I'm sorry I don't have the exact question I didn't copy it before it changed.
The solution listed was:
8.712 meters in one second would be 8.712( 7.733) meters in 7.733 seconds, or 67.36 meters.
I'm very confused by these numbers. My solution was 2.5521 s * .000456 m/s = 0.00115 m.
Question number 7 included the numbers 9.689 m and 73.94645 s and asked about the average rate of change for the object.
My solution was: 9.689 m / 73.94645 s = 0.1310273 m/s. The listed solution was 9.689 m / 73.94645 s = 7.632 m/s. This would be correct math if the division was opposite... but doesn't make sense for the answer. 7.632 m/s * 73.94645 s = way more than 9.689 m.
I understand if you can't give me the answers to my confusion because I was unable to provide you with the exact questions involved. Next time I'll be sure to copy and paste the problems right away if I feel confused, or to copy and paste the entire thing into a word document while I am working on it.
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What are the correct answers to Introductory Problem Set #1, Questions 3 and 7?
@& Occasionally the random number generator assigns the wrong value to a variable.
I believe the solution statements are all correct, but the numbers are sometimes haywire.
Clearly, for example, 9.689 m / 73.94645 s is not 7.632 m/s. Your calculation is correct.
Sometimes the nature of the error is obvious, sometimes less so. If you're ever unsure of a given solution just submit the question along with your solution and I'll be glad to review it.*@