GEO 106 Chapter Notes - Chapter 9: Industrial Revolution

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skywombat72

1 May 2012

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Urban growth: occurs when rates of growth between urban and rural populations are about the same over the long term and over wide areas. Also occurred at very high rates in developing countries. Urbanization curve has three stages : initial stage, growth stage and terminal stage. The stages can be described by: rates of growth: how fast a population is becoming urban, levels of growth: what share of a population is urban. Distinct difference between curves for developing and developed nations: developing: terminal stage was attained after just two or three decades of growth, developed: attained after a century or more of growth. The speed at which developing nations urban areas have grown has resulted in tremendous social and economic pathologies. Alters the spatial structure of a nation, both in terms of its city structure and its rural structure. Urbanization is a complex interactive process in which three related phenomena occur. These are economic transformation, demographic transformation and social transformation.

Related Questions

The fish population P(t) in a lake is suddenly attacked by adisease that render the fish unable to reproduce. Assuming that thedeath rate of the fish is inversely proportional to the square rootof the fish population (i.e. k1 = Î²/â(P) where Î² is aconstant), perform the following tasks:

1. Write a differential equation that models the population offish as a function of time. Assume that the fish are infected bythe disease at t = 0 and define your constants.

2. Solve the differential equation with the initial condition thatP(0) = P0.

3. What is the half-life of the fish population?

4. If there were 900 fish initially, and 441 are left after 6weeks, how long does it take for all the fish to die? Assume thatthe disease was caused by radioactive waste dumped in the lake. Itis discovered that another population of fish, S(t), spontaneouslymutate into the original fish at a rate of k2 (per week) and neverdie. The population S(t) are born at a rate k3.

5. Draw a diagram that describes the life cycle of these twofish populations including your rate constants.

6. Write the differential equations describing the populationsof P(t) and S(t).

What is the most likely consequence of open pit mining on plant life?

a. a dramatic reduction in the variety of plant species

b. an increase in the number of plant species

c. the complete loss of plant life in the area occupied by the surface mine

d. a temporary decrease in plant populations

rubysnake808

in biological applications concerned with population growth, anequation is used that is similar to the exponential equationsencountered in the analysis of RC circuits. applied to a number ofbacteria , this equation is

N(final)= N(initial)2^n

where N(final) is the number of bacteria present after n doublingtimes, N(initial) is the number present initially, and n is thenumber of growth cycle or doubling times. doubling times varyaccording to the organism. the doubling time for the bacteriaresponsible for leprosy is about 30 days, and that for thesalmonella bacteria responsible for food poisoning is about 20minutes.suppose 10 salmonella bacteria find their way onto a turkeyleg after your thanksgiving meal. four hours later you come backfor a midnight snack . how many bacteria are present now?

GEO 106 Chapter Notes - Chapter 9: Industrial Revolution

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