GGR107H1 Lecture : lecture

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tanskunk939

15 Dec 2010

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Farmers are becoming increasingly dependint on external imports. The size of the farm hasn"t changed all that had changed is the amount of livestock they have. There is increasing control of agribusinesses the suplliers, are taking the cereal and then selling it to the farmer. The cost of the food is increasing such as the suppliers the whole salers and the trucks. Farmer joe is going out and miking his cow but the milk goes through a whole bunch of things with agribusinesses. How is this food producedits not where it is produced its how its produced. Just because its local dosent make it better. How far does this stuff have to come. Increase in wast output contamination of land, water ecoli, antibotics. Vast majority of animals are in feed lots. They eat food that is genetically modified to increase their body fat.

Related Questions

In the diagram at the right the magnet is moving toward thecoil.

1. The magnetic flux through the coil

(a) is decreasing (b) is increasing (c) does not change

2. The direction of the induced magnetic field producedby the coil

(a) points to the left (b) points to the right (c) cannot bedetermined

3. The current through the galvanometer

(a) flows from left to right as seen in this diagram

(b) flows from right to left as seen in this diagram

x.Hme magnetic flux through a certain region is changing with time:

energy must bedissipated as heat an electric field mustexist at theboundary an emf must existaround theboundary a current must flowaround the boundary

A square loop of wire lies in the plane of the page. Adecreasingmagnetic field is directed into the page. The inducedcurrent in theloop is:

clockwise counterclockwise clockwise in twoofthe loop sides and counterclockwise in the other two zero dependsupon whether or not B is decreasing at aconstantrate

As an externally generated magnetic field through a certainconductingloop increases in magnitude, the field produced at pointsinside theloop by the current induced in the loop must be:

increasing inmagnitude decreasinginmagnitude in the same directionas theapplied field directed opposite tothe applied field perpendicularto theapplied field

As an externally generated magnetic field through a certainconductingloop increases in magnitude, the field produced at pointsinside theloop by the current induced in the loop must be:

increasing inmagnitude decreasinginmagnitude in the same directionas theapplied field directed opposite tothe applied field perpendicularto theapplied field

A long straight wire is in the plane of a rectangular conductingloop.The straight wire carries a constant current i, asshown. Whilethe wire is being moved toward the rectangle thecurrent in therectangle is:

zero counterclockwise clockwise in theleftside and counterclockwise in the right side counterclockwiseinthe left side and clockwise in the right side clockwise

The emf developed in a coil "X" due to the current in a neighboringcoil"Y" is proportional to the:

rate of change ofmagnetic field in X thickness of the wireinX magnetic field in Xcurrent in Yresistance of X

In the experiment shown:

since the two loopsare not connected, the current in G is alwayszero there is a steadyreading in G as long as S isclosed the current in thebattery goesthrough G there is a current

A long, straight, current-carrying wire passes near a wire loop.The current in the straight wire is directed to the right, and itsmagnitude is decreasing. (a) What is the direction of the magneticflux through the loop? (b) Is the magnitude of the flux through theloop increasing or decreasing with the time? (c) What is thedirection of the magnetic field produced by the induced current inthe loop? (d) What is the direction of the current induced in theloop? (e) This induced current leads to a magnetic force on theloop. What is the direction of this force? Is it directed towardthe wire or away from it?

Figure P21.19

GGR107H1 Lecture : lecture

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