GGR107H1 Lecture : The Changing Countryside

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burgundydeer809

14 Mar 2012

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Rural perceived to have less population and land-building relationship. Reality of rural is different in different locations: canada vs. u. k. (which is densely populated) Critical economy approach: where they are situated in global economy. Idea rural is created by ppl who live there and don"t live there. Functionalist approach: landscape is organized in a particular way to perform certain functions. Critical economy approach: consider why there are certain things happening in rural environment in relation to global/broader structures, consider why that building is so run down, consider what happened to the farmer (possible struggles) Social construction approach: consider what the setting means, remote, peace, quiet, close family ties, calming, hard work vs. leisurely drives around the countryside (for scenery) Earl butz: agriculture is for producing more food. Farming = commercial operation not, not family operation. Average person spends 16% of income on food (very low) Over production of corn mainly used for non-food uses.

Related Questions

A group of students performed the "SpringâMass" experiment usinga spring of non-negligible mass Ms kg and spring constant k N/m.The students determined the period of oscillation for sevendifferent values of the hanging mass m. They obtained the followingresults:
m (g) T (s)
50 0.147
70 0.167
90 0.185
110 0.201
130 0.216
150 0.230
170 0.244

Note: In lab the spring's mass was negligible but here you need toinclude 1/3 of Ms with the hanging mass. Consider how this willchange the equation for the springâmass system.
(a) Use Excel to construct a spreadsheet and do the following. (Youwill not submit this spreadsheet. However, the results will beneeded later in this problem.)
(i) Enter the above data.
(ii) Create a graph of T2 vs. m.
(iii) Use the LINEST function to determine the slope, y interceptand the associated uncertainties.

(b) Record your values below.
slope = Â±
y-intercept = Â±

(c) What is the formula for the uncertainty in k in terms of theuncertainty in the slope? (Use the following variable as necessary:k and Ï_s for the uncertaintyin the slope.)
Ï_k =

(d) What is the formula for the uncertainty in Ms the mass of thespring, in terms of the uncertainty in the y intercept andÏ_y? (Use the following asnecessary: Ms, yi for the y intercept,Ï_s, and slope.)
Ï_Ms =

(e) From your value of the slope determine the spring constant k ofthe spring.
k = Â±

(f) From your value of the intercept determine the mass Ms of thespring.
Ms = Â±

The sport of skateboarding provides an excellent example of theprinciple of Conservation of Energy. In particular, let us consider'vert skateboarding' where a person rides the skateboard on avertical ramp that forms part of a hemisphere referred to as a'half-pipe.' It consists of the transition from the curved part tothe flat and the vertical. Below is a schematic of a half-pipe withthe 'vert'. The surface of the half-pipe and the material of thewheels on the skateboard allow for an almost frictionless ride.Therefore we will neglect friction in the following analysis.

The rider starts from rest at location 1 at the edge of the in-rampand goes down the transition. Typically, as the rider approachesthe flat at location 2 he will crouch down to get his center ofmass as low as possible and thus increase his speed. To simplifythe problem, let us initially assume that the rider stays uprightas he goes down so that his center of mass location relative to hisfeet does not change from what it was at location 1 . In thefollowing problems, you can use the foot as the unit length insteadof meters. Note: g = 32 ft/s2.

Estimate the maximum speed a rider might have at location 2

(b) For the speed you estimated in part (a), using Conservation ofEnergy, determine the maximum height the rider can rise up to as hegoes up the vert.

GGR107H1 Lecture : The Changing Countryside

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