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Packet F: Bonus 17

The topology of these constructs is given by their helicity, which is the sum of their writhe and twist. For 10 points each:
[10e] Name these vector fields whose lines can be visualized using iron filings and are drawn from the north to south pole.
ANSWER: magnetic fields [accept magnetic field lines; or B-field]
[10m] For a particle in a non-uniform magnetic field, they experience a component of this quantity proportional to the gradient of B. For electrons in a uniform electric field, this quantity equals mobility times electric field.
ANSWER: drift velocity [prompt on drift; prompt on velocity; prompt on u]
[10h] Moving particles in a magnetic field also experience a drift velocity term named for and proportional to this quantity. In MHD, magnetic fields with a non-zero value of this quantity experience magnetic tension equal to this quantity times B-squared over permeability of free space.
ANSWER: curvature [accept curvature drift; prompt on kappa; reject “radius of curvature”]
<WashU A, Physics> | Packet F - Chicago C, McGill C, WashU A, Chicago B

HeardPPBE %M %H %
6310.4892%13%0%

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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
CWRU BOhio State C100010E
Michigan BMichigan A100010E
Ohio State AMichigan C1010020EM
Ohio State BCWRU A1010020EM
PittsburghMichigan State100010E

Summary

TournamentEditionMatchHeardPPBE %M %H %
California (North)Main Site✓313.33100%33%0%
California (South)Main Site✓47.5075%0%0%
CanadaMain Site✓78.5786%0%0%
FloridaMain Site✓120.00100%100%0%
Great LakesMain Site✓514.00100%40%0%
Lower Mid-AtlanticMain Site✓710.00100%0%0%
MidwestMain Site✓58.0080%0%0%
NortheastMain Site✓313.33100%33%0%
OverflowMain Site✓310.00100%0%0%
South CentralMain Site✓10.000%0%0%
SoutheastMain Site✓510.00100%0%0%
UKMain Site✓1011.00100%10%0%
Upper Mid-AtlanticMain Site✓711.43100%14%0%
Upstate NYMain Site✓210.0050%50%0%