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--- 184_projects:f21_project_4 [2021/08/19 14:53] – created dmcpadden
+++ 184_projects:f21_project_4 [2021/09/24 14:32] (current) – dmcpadden
@@ Line 2: / Line 2: @@
 ===== Project 4 =====
+==== Project 4A: StickyStuff and the Dust Particle ====
+{{  183_projects:taperoller.png?500}}
-==== Project 4A: Better Thundercloud Model ====
+Adhesive tape is manufactured by repeatedly rolling and unrolling large sheets of plastic, which can cause there to be a charge on the surface of the tape. Why this important you may ask? Trapped in the town of Lakeview, S.P.A.R.T.A.N force has been called to the premises of StickyStuff Corporation. StickyStuff Corp has been tasked with producing a special type of adhesive tape to be used on a new top-secret spacecraft called Artemis 13. Unfortunately, there has recently been a dust problem in the manufacturing plant. Dust particles (on average,  $charge=0.802*10^{-14} C$ ,  $m=5.5*10^{-8} g$ ) have been accumulating on the tape as it rolls through the assembly line. The problem has been isolated to a single roller, which operates for 10 seconds at a time at a power of 100 watts (where 1 watt = 1 J/s). Using your handy-dandy-super-extender tape measure, you find that exactly 30 m of tape passes over the roller during each 10 second time period. Your team needs to determine where to put a fan and how much force the fan needs to exert on each dust particle, such that the fan blows away any dust that may be attracted to the tape. The tape must be in excellent condition before being used on the spacecraft. From your adhesive engineering education, you have access to a [[https://www.alphalabinc.com/triboelectric-series/|table]] that you think may help.
+(There's actually a pretty cool "How it's Made" video [[https://youtu.be/pwIiDn4ShE0|here]] if you have time at the end.)
+<WRAP INFO>
+=== Learning Goals ===
+  * Create an analytic model for a line of charge
+  * Be able to explain how you set up each part of the integral,  $dQ$ ,  $r$ , limits, etc.
+  * Explain how you used superposition in your solution
+  * Understand how surfaces become charged (particularly as an insulator in this case)
+</WRAP>
+==== Project 4B: Better Thundercloud Model ====
 {{  184_projects:project4b.png?300}}
 The storms over Lakeview have gotten worse, with an almost permanent pitch black cloud system hovering overhead. A new model for the thundercloud needs to be produced to obtain a better understansding of how it is functioning. While they greatly appreciated the model you created last week for the Mapping N $\vec{E}$ twork Sensory Array (MNSA), the data they are collecting from the sensors are simply not matching the model's predictions. They have concluded that modeling storm clouds as point charges was, in fact, problematic. Based on some research from the [[184_notes:lightning|National Weather Service]], it looks like a better model for clouds would be two flat sheets of charge since the negative charges in the cloud collect on the bottom of the cloud and the positive charges collect near the top.
@@ Line 81: / Line 96: @@
   * Compare/contrast process for a 2D charge distribution with a 1D charge distribution
 </WRAP>