I've been reading guns, germs and steel by jared diamond. in it, he estimates that the spread of humans to the americas, starting from an initial entry point up in alaska, took around 2000 years to arrive at tierra del fuego. he often talks about technology, language, culture and human populations spreading by "diffusion".

assuming "diffusion" is an accurate model for the spread of humans, what is the effective diffusion coefficient of human hunter-gatherers? you can assume this is essentially a 1d process, since there are bottlenecks along the way (most notably central america) that restrict flow to narrow geographical passages. i took the alaska - argentina distance from here (48,000 km); yes, i realize the pan-american highway hadn't been built yet in 14000 bc but presumably it's a decent estimate of the total overland distance from upper alaska to the southern tip of south america. nothing m2/s

i think the correct answer from the choices listed above is option c. when the kinetic energy of particles in a liquid state decreases

explanation:

50 inches should be the resultant vector

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015