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course Phy 202
2/17 11 pm
formatting guidelines and conventions#$&*
Phy 202
Your 'formatting guidelines and conventions' 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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2/7 2:30pm
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You should have a permanent notebook dedicated to the lab portion of this course. You should keep a record of the lab work you do, including free-hand sketches of apparatus and reasonably accurate but not meticulous hand-sketched graphs (you will likely use the computer to make meticulous graphs, but in the hand-sketching process you think about important aspects of the graph that don't necessarily become apparent if you use a machine to do the sketching).
Some of your data will be taken by a computer or with the aid of a computer, and you will not be expected to write down the hundreds or thousands of data points involved in that process, but you should keep a small sample indicative of the results you obtain, and preliminary observations on trends and other aspects of your data which might be relevant to what you are observing.
You should also keep a record of where your data files are located, and you should maintain a secure backup of all your data files. If you lose your data, you might end up having to repeat your experiment.
You might at any point in the course be asked to reproduce information from your lab work. You lab notebook will be the key to being able to do so.
Indicate below, in your own words, the importance of maintaining a good lab notebook.
Because some of he data where using might be relevant down the line, you may aloso ask to see something. As well as keeping good records and maintianing data in order not to repeat labs.
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It will be very important in your course that you report data in a way that can be both easily understood and electronically processed by your instructor and by your fellow students.
Report 4 two-digit numbers (e.g., 78 is a two-digit number; you can make up any four such numbers you like), one to each line, with a short note starting at the 5th line indicating how you chose your numbers (the note and the explanation should be brief and uncomplicated; it's not intended to be difficult. Anything you put down will be fine.)
your brief discussion/description/explanation:
08
09
10
11
consecutive numbers starting with my youngest daughters age
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Next report four 2-digit numbers in one line, separated by commas, and a short note starting at the 2d line briefly explaining how this format is different than the one in your preceding response.
your brief discussion/description/explanation:
08, 09, 10, 11
This format different because its numbering horizontally and the other format is vertically
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Suppose we have a meter stick oriented to that readings run in cm from left to right. Suppose we also have some object sitting at the 15 cm position. Another object at the 25 cm position will be 10 cm to the right of the first object, so the position of the second object relative to the first is +10 cm (remember that increasing numbers go to the right, so + indicates an object to the right of the reference position).
A third object sitting at the 5 cm mark will have a position relative to the first of -10 cm (as we move to the left readings on the meter stick decrease, so the - sign indicates a position to the left of the reference object).
An object with a position relative to the first object of -5 cm will be 5 cm to the left of the reference object, which will place it at the 10 cm mark of the ruler.
Call the position of the first object the reference position. Then an object at +25 cm relative to the reference position will be 25 cm to the right of the 15 cm mar, putting it at the 40 cm mark.
Jot down your answers to the following in your lab notebook. It is suggested that you accompany your answers with a sketch. If you don't yet have a dedicated lab notebook
What would the position relative to the reference object of an object at the 20 cm mark?
Where on the ruler would be an object at position -7 cm relative to the reference object?
If an object is at the 2 cm mark on the ruler, what is its position relative to the reference position?
What is the position on the ruler of an object located at +35 cm with respect to the reference position?
Place your answers in the first line of the indicated space below, with commas between your answers. Place only numbers and commas in this line.
On the second line specify the meaning of the numbers on the first line, and the units represented by those numbers (the units here are centimeters).
Then give a brief explanation of your understanding of the concept of relative position.
your brief discussion/description/explanation:
5, 8, 13, 50
+5 cm, -8 cm, -13 cm, +50 cm, my understanding is that relative position is that it is your starting point
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Suppose the y positions 5, 12, 21, 37, in cm, occur at respective clock times 2,4,6,8 seconds. A comma-delimited table of y vs. t would then consist of 4 lines with the t value first and the y value second.
Important convention: When we list one quantity vs. the second quantity, it's the second quantity, the one after the 'vs.', that goes in the first column. Remember this.
So the table corresponding to the above information would be
2, 5
4, 12
6, 21
8, 37
Suppose now that temperatures of 80, 60, 50 and 45 deg occur at clock times 3, 10, 24 and 41 minutes.
Report this temperature vs. clock time data in the indicated space below, in comma-delimited format as explained above. Use numbers only--no units. The units will be explained in your additional lines.
Then add a sentence or two starting in the fifth line, which specifies what these number mean: which number is first, which is second, and why; what quantity is belng listed vs. what; and in what units each quantity is being reported.
your brief discussion/description/explanation:
3, 80
10, 60
24, 50
41, 45
first number is the clock time data and the second number is te temperature hence temperature vs. clock time data. The units are temp in deg and time in minutes.
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Suppose that in a flow experiment depths of 30, 20, 14 and 9 cm occur at clock times of 2, 12, 24 and 36 seconds. List the clock times only in the first line, separated by commas. List the depths only in the the second line, also in comma-delimited format. Starting in the third line, briefly explain what you did.
your brief discussion/description/explanation:
0, 2; 0, 12; 0, 24; 0, 36
30, 0; 20, 0; 14, 0; 9, 0
I added a zero where the value was not listed or the opposite either x or y
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Now go into Notepad or another text editor, list the ordered pairs indicating the data just given above, but in tab-delimited format.
You have to go into another program to enter tabs because if you try to enter a tab on the form, it will 'jump' you to the next 'answer box'.
Enter your data so that on the first line you have your first clock time, then a single tab (hit the 'tab' key on your keyboard), followed by the first depth.
Then add a line for each subsequent data point, so that you have reported your information on four lines delimited by tabs.
On the fifth line, specify the units of the data you have given. Starting in the next line give a very brief explanation of what you just did.
Then highlight, copy and paste this data into the form.
your brief discussion/description/explanation:
2 30
12 20
24 14
36 9
units are x = seconds and y = cm pretty much just put the data in x, y coordinates
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Suppose that the third column of the Timer program shows the numbers 3.7, 4.3, 5.2, 3.9, 4.3. Recall that the third line consists of the time intervals between clicks.
The clock time of the first click would be in the middle column. If necessary, briefly review the TIMER program, or the data you have obtained from that program.
We will define the 'first click' as the one that occurred at the beginning of the 3.7-second interval.
What would be the clock time relative to the first click of each of the four given numbers from the third line?
List these clock times in the first line in comma-delimited format. In the second line indicate the units of the numbers you have placed in the first line, and explain how you obtained the clock times.
your brief discussion/description/explanation:
0.6, 1.5, 0.2, 0.6
units are seconds, you obtain these values by subtracting the relative number from the later numbers
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Suppose that in a room at temperature 23 C, an experiment reports 50 C, 40 C, 35 C and 31 C. Report these temperatures in Celsius degrees in the first line, using comma-delimited format. In the second line report in the same format the temperatures relative to room temperature. In the third line specify what the units are, that the second-line temperatures are relative to room temperature, and also report the room temperature.
your brief discussion/description/explanation:
50 C, 40 C, 35 C, 31 C
+27 C, +17 C, +12 C, +8 C
the units are in Celsius, second-line temperatures are relative to room temperature which is 23 C
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Finally, suppose that the temperatures given above occur at clock times 10, 20, 30 and 40 minutes. Report temperature vs. clock time in comma-delimited format, one temperature and one clock time to a line.
Then in a fifth line, report in comma-delimited format the average rate of temperature change with respect to clock time, in degrees Celsius per minute, on each of the three intervals.
Starting at the sixth line state what is reported in your lines, and how you obtained your average rates.
your brief discussion/description/explanation:
10, 50
20, 40
30, 35
40, 31
20, 45 C; 30, 42 C; 40, 39 C
at clock time of 20 min the average is 45 C, at 30 min its 42 C, at 40 min its 39 C and I got these values by averaging the degrees up to that clock time
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These are not average rates of change.
For any given interval the average rate of change of A with respect to B is by definition equal to (change in A) / (change in B).
Can you apply this definition to the question posed here?
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5, 2, 1.17, .775 so the average rate of change is decreasing, achieved these numbers by taking temp and dividing it by time taken
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The key words you are missing are 'change in'. My note on your previous lab will cover this.
It only takes a couple of minutes to correct this, so just to be sure you understand this essential definition please do so.
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Your instructor is trying to gauge the typical time spent by students on these experiments. Please answer the following question as accurately as you can, understanding that your answer will be used only for the stated purpose and has no bearing on your grades:
Approximately how long did it take you to complete this experiment?
1 hour, not to accurate because I was stopping and doing other things so it could have been longer or shorter
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You may also include optional comments and/or questions.
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Good, but you need a revision on that last question.
&#Please see my notes and, unless my notes indicate that revision is optional, submit a copy of this document with revisions and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).
Be sure to include the entire document, including my notes.
If my notes indicate that revision is optional, use your own judgement as to whether a revision will benefit you.
Spend a reasonable amount of time on your revision, but don't let yourself get too bogged down. After a reasonable amount of time, if you don't have at least a reasonable attempt at a solution, insert the best questions you can showing me what you do and do not understand, and I'll attempt to clarify further.
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end document
Self-critique (if necessary):
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Self-critique rating:
________________________________________
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The error you made here is the same basic error you made on the velocities in the flow lab.
It shouldn't take you 5 minutes to make a revision. It's important to understand the defintion of a rate and apply it correctly.
&#Please see my notes and, unless my notes indicate that revision is optional, submit a copy of this document with revisions and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).
Be sure to include the entire document, including my notes.
If my notes indicate that revision is optional, use your own judgement as to whether a revision will benefit you.
Spend a reasonable amount of time on your revision, but don't let yourself get too bogged down. After a reasonable amount of time, if you don't have at least a reasonable attempt at a solution, insert the best questions you can showing me what you do and do not understand, and I'll attempt to clarify further. &#
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