Use Stoke's theorem to evaluate ?

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Stokes' theorem relates a surface integral over a surface S to a line integral around the boundary curve C of S, specifically stating that the integral of the curl of a vector field F over S equals the integral of F along C. The user is seeking assistance with a specific problem from their calculus textbook that involves applying Stokes' theorem to evaluate a line integral given a vector field F and a surface S defined by z = 9 - x² - y². They express confusion about how to approach the problem and are looking for guidance to impress their professor. The discussion highlights the importance of understanding both the theorem and the specific problem setup to find a solution. Overall, the user is eager to learn and improve their calculus skills before the final exam.
CalleighMay
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Hey guys! I have been on the forum for about a week or so and have compiled a lot of information and techniques to help me understand calculus, so i really appreciate everyone's help!

I am a soon-to-be freshman in college and am taking a summer class, calculus II (took calc I in HS). This is our last week of class after our final exam so my professor is taking this time to give us a preview of what we will be learning in the fall semester in Calc III (since this is the same professor). Every Tuesday class our professor gives us a few problems from future sections and asks us to "see what we can come up with" and to work together to find solutions. The following Tuesday he asks us to discuss the problems as a class, seeing which ones of us know our stuff =P

Basically, i want to ask you guys what you think about these problems as i do them along before i have my discussion. I really want to make a lasting impression on my professor by "knowing my stuff" -to show him i can do it! All's i need is a little help! Would you guys mind giving me some help?

We are using the textbook Calculus 8th edition by Larson, Hostetler and Edwards and the problems come from the book.

The problem is on pg 1133 in chapter 15.8 in the text, number 14. It reads:

Use Stoke's theorem to evaluate Integral (with C at bottom) of F (with a dot) dr
It states that in each case, C is oriented counterclockwise as viewed from above.
For this specific problem is gives,
F(x,y,z)=4xzi + yj + 4xyk
and
S: z= 9-x^2-y^2
and z>=0

Again, i literally haven't a clue where to go with these =/ I looked at the soln's to the other problems in this set but still haven't a clue where to go! =/
Any help at all would be greatly appreciated. Thanks guys ;)
 
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Well, firstly, what is Stokes' theorem?
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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