GEO 509 Lecture Notes - Lecture 4: Brussels Sprout, Broccoli, Scurvy

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salmoncamel137

13 Oct 2012

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Perils of food (image of human evolution to a fat person) explanation: - growing concerns of appropriate eating. Why is the global population becoming larger. One reason we"re getting bigger: eating more fast food (more fat) The economist article based on lansat (medical journal), compared levels of obesity through geographical patterns . Also talked about historical patterns (how have people changed in terms of weight, over time). It found with one small exception, obesity was a rich man/womans disease in the. If you have a bmi of under 18. 5, you are too thin. If you are between 25-29. 9 you are overweight. Productivity map: designed to suggest that certain kinds of food have certain kinds of functions. i. e. foods that improve our digestion and contribute to sleep. Is the 100th anniversary of the discovery of vitamins (discovered in 1912: the reason food is beneficial for us related to the vitamin content in large measures, discovered by a dutch man, cornelius pekelharing.

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MAC, Inc. (the company you work for) has decided to move forwardwith a feasibility
study for a product it wishes to manufacture and sell. This productis a particle launcher that should have the capability, for everyactivation, of launching two particles into the air at twodifferent times and at two different angles of elevation, in anautomated fashion so that they both land at the same distance fromthe launch point at the same time. For example, let P1 and P2 betwo particles, let T1 and T2 be two times, and let theta1 andtheta2 be two angles of elevation. Once activated, the launchershould be able to operate so that particle P1 is launched at timeT1 with an angle of elevation theta 1, and particle P2 islaunched
at time T2 with an angle of elevation theta2.
The launcher must be configured by a technician, prior to eachactivation, so that the
initial speed is set for the launcher, and the distance from thelauncher to where both
particles will land is set. For each activation of the launcher,the initial speed will be the
same for both particles. Once the technician has set the initialspeed and desired distance,
the launcher must calculate the angles of elevation to use and howmuch time to wait in
between particle launches. Then, when the technician activates thelauncher, both
particles will be launched at the appropriate angles of elevationand at the appropriate
times so that they both land at the configured distance from thelauncher at the same time.
The launcher, based on its calculations, will change the angle ofelevation to be ready for
the second particle launch. The launcher, however, must flash awarning for the
technician if the information the technician used to configure thelauncher does not result
in a two-particle launching solution.
Certain assumptions must be made. It is assumed that that launchercan always change
the angle of elevation to get ready for the second particle launchfaster than the time
delay calculated for the second particle launch. It is assumed thatthe units for speed are
meters per second, that the units for distance are meters, and thatgravity is 9.8 meters per
second squared. It is assumed that gravity is the only force actingon the motion of the
particles after launch, and that there is no wind to be considered,so that the particles land
at a point exactly in line with the direction the launcher ispointed.
The questions that must be answered and written up in anengineering report are as
follows:
1. Given the initial speed and desired landing distance for theparticles, find the
mathematical expressions that must be used to find 1, 2, and thetime delay
between particle launches.
2. Determine under which conditions the launcher will not be ableto perform the
operation requested, and will consequently flash a warning to thetechnician.
3. Each particle launched will follow a path of motion that isparabolic. Show that
the vertex of the parabola for each particleâs path occurs at thesame distance from
the launcher.
4. Along the path of each launched particle, there will be amaximum curvature.
Find that maximum curvature for each launched particle.

This is the introduction of my scientific poster presentationplease proofread it grammatically and scientifically and give meany suggestions you have! Thanks.

Here it is:

Have you ever thought about why would thrillingrides get you excited, make your heart racing oreven make you start screaming from the depths of your core, forminga bead of sweat on your forehead?

Well, the answer lies in physics. These rides demonstrateparticularly good examples of the physics laws and conceptsinvolved in nature and their effect on us in real-lifeapplications.

Height, weightlessness, high velocity, huge acceleration,centripetal force, impulse and the momentary change in momentum,the work being done and the change in energy, are all factorsthat contribute in making a thrilling ride an exciting one. Thosefactors cause adrenalin rush which leads to a higher bloodpressure thus stimulating the heart. They also put the riderin a lot of uncertainty and unexpected visual cues.

An example of a thrilling ride is the Giant Drop which isa free-fall ride involving the drawing of an eight seat carriage bya cable to the top of the tower. After one minute full of anxiety,the riders are plummeted down a height of 39 stories (almost 115m)then brought to rest within meters from the ground by asophisticated magnetic braking system.

Hi this is the introduction that I have written for my poster. Myposter is on the following URL (please have a look!).

http://i55.tinypic.com/e0g0w5.jpg

Please correct the introduction for any scientific or grammaticalerrors and give me your suggestions about this section as well asthe overall poster. Thanks

This is very important so if you are not good at it pleasedon't answer.

Here is the introduction :

Have you ever thought about why would thrilling rides getyou excited, make your heart racing orsometimes even make you start screaming from the depths of yourcore, forming a bead of sweat on your forehead?

Well, the answer lies in physics. These rides demonstratevery good examples of the physics laws and concepts involved innature and their affect on us in real life applications.

Height, weightlessness, high velocity, hugeacceleration, the sudden impulse and themomentary change in momentum, the work being done and the suddenchange in energy are all factors that contribute inmaking a thrilling ride an exciting one. Those factorsmake adrenalin concentrations in our body system increasecausing higher blood pressure thus stimulating theheart.. They also make the rider in a lot ofuncertainty and unexpected visual cues.

An example of a thrilling ride is the Giant Drop which isa freefall ride involving the drawing of an eight seat carriage bytwin cables to the top of the tower. After one minute full ofanxiety, the riders are plummeted down a height of 39 stories(almost 115m) then brought to a halt within meters from the groundby a sophisticated magnetic braking system.

GEO 509 Lecture Notes - Lecture 4: Brussels Sprout, Broccoli, Scurvy

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