phy 201
Your 'cq_1_04.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
The purpose and the process of answering 'seed' questions:
In cloud seeding small crystalline particles (the 'seeds') are scattered throughout a cloud, so that water vapor in the cloud will build up on the 'seed' and eventually fall in the form of rain.
These questions are posed without any previous explanation. You are expected to use what you already know, along with common sense, to answer the questions. It is standard practice in many courses to an instructor to give explanations and examples before asking students to answer questions, and you will see plenty of examples and explanations in this course. However the goal here is to first experience and think about a situation. Whether you think correctly or incorrectly, your thinking gets you started on an idea and forms a 'seed' on which understanding can accumulate.
• You are expected to answer it to the best of your ability, based on what you know at the beginning of this assignment.
• You are not expected to research this question until after you have submitted your best response.
• You are not penalized based on whether your answer is 'right' or 'wrong', but you are expected to think as clearly and deeply as you can about the question.
• You are not, however, expected to spend hours thinking about the question or agonize unduly about your answers. A rule of thumb is to give it up to 20 minutes, half for thinking and half for typing in your answers (maybe a little more for the typing if you don't have good keyboard skills).
• Your answers should consist of your best attempt at a solution, and/or one or more questions about the situation.
• If you think you know the answer or can make a reasonable attempt to answer, then give your answer along with a concise outline of your reasoning.
• If you aren't sure what the question is asking, make your best attempt to interpret and answer it, and consider including one or more questions.
• If you are very sure you don't know what the question is asking, then break it down phrase-by-phrase or even word-by-word and explain what you think each key phrase or word might mean.
• A question consists of a complete but concise statement of what you do and do not understand about the situation.
• There are two ways you can spend an excessive amount of time explaining your solutions and/or asking questions. One is to type a lot more than what is necessary, and another is to spend a lot of time worrying about what is and is not necessary. Balance the two in the way that works best for you.
• Remember that the 'concise' part is more for your benefit than mine. I can read a lot more quickly than you can type, and don't mind reading through a lot of words to understand your meaning.
• You are invited but not required to include comments and/or discussion.
• You are welcome to use reasonable abbreviations in your work.
________________________________________
Copy the problem below into a text editor or word processor.
• This form accepts only text so a text editor such as Notepad is fine.
• You might prefer for your own reasons to use a word processor (for example the formatting features might help you organize your answer and explanations), but note that formatting will be lost when you submit your work through the form.
• If you use a word processor avoid using special characters or symbols, which would require more of your time to create and will not be represented correctly by the form.
• As you will see within the first few assignments, there is an easily-learned keyboard-based shorthand that doesn't look quite as pretty as word-processor symbols, but which gets the job done much more efficiently.
You should enter your answers using the text editor or word processor. You will then copy-and-paste it into the box below, and submit.
________________________________________
The problem:
A ball is moving at 10 cm/s when clock time is 4 seconds, and at 40 cm/s when clock time is 9 seconds.
• Sketch a v vs. t graph and represent these two events by the points (4 sec, 10 cm/s) and (9 s, 40 cm/s).
answer/question/discussion: ->->->->->->->->->->->-> :
I have done this on graph paper in my notebook.
• Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> :
I have done this on graph paper in my notebook.
• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> :
The rise is 1 and the run is 6. Therefore the slope is 1/6.
&#Units should be represented in every step of every calculation, and should be treated as algebraic symbols to be combined and simplified according to the rules of algebra. An error in the units of your final quantity can indicate a flaw in your sequence of calculations; this could also reveal an algebraic errors with the units, which should be corrected. &#
you also have your rise and run backwards.
• What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> :
The way I have my graph drawn on graph paper, there are one inch squares, so I am going to use square inches as my unit.
Triangle, base times height(.5)= 6x5x(.5)=15in squared
Rectangle, length times width=6(4)=24 in squared
15+24=39in squared
(I think that is what you are asking for!!!)
Good attention to the units of area.
However you want to also understand what a unit of graph area represents. Apparently one inch on your vertical scale stands for a certain number of cm/s, an inch on the horizontal scale for a certain number of seconds.
I can't match your numbers to the problem.
________________________________________
Copy and paste your work into the box below and submit as indicated:
** **
45 minutes
** **
I did the graphs in my notebook.
&#Please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified. &#