PHLA10H3 Lecture 5: Week 5 Notes

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azurelocust306

8 Feb 2011

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Two hypothesis: a single tree of life, modification by natural selection one tree of life means all living creatures are descended from one original organism. Modification by natural selection involves some extra hypothesis: offsprings inherit the characteristics of their parents, there is a slight variation in ____ some variations increase fitness of offspring, e. g. artificial selection. Population gets geography splintered so they evolve (natural selection) to surroundings. Theistic evolution god created world and stepped away let evolution take its course. Atheistic evolution there is no god only physical processes leading to evolution. Creationism god created world god intervenes (young earth) (no speciation) Thermodynamics makes evolution impossible impossible for order to arise from disorder by natural process but this is for closed systems the earth is not closed so the second law is not correct anything can happen www. notesolution. com. Faith vs. science is creationism science or religion.

Related Questions

5.53 - Rotating Space Stations. One problem for humans living in outer space is that they are apparently weightless. One way around this problem is to design a space station that spins about its center at a constant rate. This creates artificial gravity" at the outside rim of the station. (a) If the diameter of the space station is 800 m, how many revolutions per minute are needed for the "artificial gravity" acceleration to be 9.80 m/s?? (b) If the space station is a waiting area for travelers going to Mars, it might be desirable to simulate the acceleration due to gravity on the Martian surface (3.70 m/s-). How many revolutions per minute are needed in this case?

The armature in an electric generator is rotating at the rate of 100 revolutions per second. (rps) If the maximum voltage produced is 310 V, find an equation that describes this variation in voltage. What is the RMS voltage?

bluewombat263

Artificial gravity is a must for any space station if humans areto live there for any extended length of time. Without artificialgravity, human growth is stunted and biological functions breakdown. An effective way to create artificial gravity is through theuse of a rotating enclosed cylinder, as shown in the figure. Humanswalk on the inside edge of the cylinder, which is sufficientlylarge (diameter of 2235 meters) that its curvature is not readablynoticeable to the inhabitants. (The space station in the figure isnot drawn to the scale of the human.) Once the space station isrotating at the necessary speed, how many minutes would it take thespace station to make one revolution?

The distance traveled by the man in one revolution is simply thecircumference of the space station, C = 2p R. From this result, youshould be able to deduce the time it takes for the space station tosweep out a complete revolution.

PHLA10H3 Lecture 5: Week 5 Notes

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