mu-nought - 2025 ACF Fall - Buzzpoints App

Question

The auxiliary magnetic field H is defined in terms of the B-field, the magnetization, and this physical constant. For 10 points each:

[10m] The enclosed current in Ampère’s law is multiplied by what constant that is the magnetic analogue of the vacuum permittivity? You may either name the quantity or give the symbol used to write it.

ANSWER: mu-nought [or permeability of free space; or vacuum permeability; or vacuum magnetic permeability; or mu-zero or mu-sub-zero; prompt on mu]

[10h] Mu-nought exactly equals this value times ten to the negative seven Newtons per ampere squared. Coulomb’s constant equals the reciprocal of the product of this value and epsilon-nought.

ANSWER: four pi [or four times pi; or two times tau; prompt on decimal expansions such as 12.566…]

[10e] The electromagnetic wave equation shows that this quantity equals one over the square root of the product of mu-nought and epsilon-nought. Einstein theorized that energy equals mass times this quantity squared.

ANSWER: speed of light [or velocity of light; prompt on c; prompt on speed or velocity]

<Editors, Physics>

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Summary


Northern California	Main	Y	4	27.50	100%	75%	100%
Eastern Canada (1)	Main	Y	4	15.00	100%	50%	0%
Eastern Canada (2)	Main	Y	8	13.75	100%	25%	13%
Florida	Main	Y	4	12.50	100%	25%	0%
Great Lakes	Main	Y	10	17.00	100%	40%	30%
Lower Mid-Atlantic	Main	Y	9	14.44	100%	44%	0%
Upper Mid-Atlantic	Main	Y	9	15.56	100%	22%	33%
Midwest	Main	Y	9	18.89	89%	44%	56%
North	Main	Y	4	22.50	100%	75%	50%
Northeast	Main	Y	11	18.18	100%	55%	27%
South Central	Main	Y	6	13.33	100%	33%	0%
Southeast	Main	Y	12	19.17	100%	58%	33%
UK (North)	UK	Y	5	20.00	100%	60%	40%
UK (South)	UK	Y	8	18.75	100%	50%	38%
Upstate NY	Main	Y	5	20.00	100%	40%	60%

Data


Berkeley Boss Bandit	UCSC	10	10	10	30
Berkeley Archer Queen	Berkeley Little Prince	10	10	10	30
Stanford B	Berkeley Mighty Miner	10	10	10	30
Berkeley Skeleton King	Stanford A	0	10	10	20
McGill A	McGill E	10	0	10	20
McGill C	Ottawa B	0	0	10	10
Guelph A	Waterloo B	0	0	10	10
McMaster A	Waterloo C	0	0	10	10
Toronto D	McMaster C	0	0	10	10
Toronto E	Brock A	10	0	10	20
McMaster B	Toronto G	0	0	10	10
Toronto A	Toronto H	0	0	10	10
Toronto B	Toronto I	0	0	10	10
Waterloo A	Queen's A	10	10	10	30
Florida A	Florida State A	0	0	10	10
ERAU Daytona A	Florida B	0	0	10	10
Florida Tech A	UCF A	10	0	10	20
Florida Tech B	South Florida A	0	0	10	10
CWRU C	Louisville C	10	10	10	30
Louisville B	Kentucky	0	10	10	20
Louisville D	CWRU D	0	10	10	20
Michigan A	Ohio State B	10	0	10	20
Ohio State C	Michigan B	0	0	10	10
Pittsburgh	Michigan State C	0	0	10	10
Louisville A	Michigan State D	10	0	10	20
Michigan State A	Ohio State D	10	0	10	20
Michigan State B	WVU A	0	0	10	10
CWRU A	WVU B	0	0	10	10
McGill B	Carleton A	10	0	10	20
Carleton B	Ottawa A	0	0	10	10
UNC B	JMU B	0	0	10	10
William & Mary A	Duke A	10	0	10	20
Virginia Tech C	Liberty B	0	0	10	10
Virginia A	Liberty C	10	0	10	20
Virginia Tech B	NCSU B	0	0	10	10
UNC A	Tusculum A	0	0	10	10
UNC C	JMU A	10	0	10	20
NCSU A	William & Mary B	10	0	10	20
Liberty A	Virginia Tech A	0	0	10	10
Lehigh A	Columbia B	10	0	10	20
George Mason A	Columbia A	0	10	10	20
Maryland A	George Mason C	0	0	10	10
Maryland C	Rowan	0	0	10	10
George Mason B	NYU B	0	0	10	10
Penn	NYU C	0	0	10	10
Maryland B	Rutgers A	0	0	10	10
NYU A	Stony Brook	0	10	10	20
Rutgers B	Vassar A	10	10	10	30
Illinois Blue	Purdue D	10	10	10	30
Iowa A	Chicago B	0	0	10	10
Purdue B	Illinois Champaign	10	10	10	30
Illinois Orange	Chicago A	10	10	10	30
Purdue A	Illinois Urbana	0	10	10	20
Rose-Hulman A	Indiana A	0	0	0	0
Purdue C	WashU Grizzlers	10	10	10	30
William Woods University A	Iowa B	0	0	10	10
WashU Grolars	Illinois Canada	0	0	10	10
Macalester	St. Thomas	10	10	10	30
Wisconsin A	Michigan Tech	10	10	10	30
Minnesota	Wisconsin B	10	0	10	20
Wisconsin C	Iowa State	0	0	10	10
Dartmouth B	Brandeis Bach	10	0	10	20
Brown A	Williams C	10	10	10	30
Amherst A	Dartmouth C	0	0	10	10
Williams A	Harvard	10	0	10	20
MIT B	Boston College B	10	10	10	30
MIT A	Tufts A	10	10	10	30
Tufts C	Boston University A	10	0	10	20
UConn A	Boston University B	0	0	10	10
Dartmouth A	Vermont B	0	0	10	10
Vermont A	Williams B	0	0	10	10
Brandeis Mozart	Brown B	0	0	10	10
Nebraska B	Kansas State B	0	0	10	10
Murray State College A	Nebraska C	10	0	10	20
Murray State College B	Central Oklahoma B	0	0	10	10
Nebraska A	Kansas State A	0	0	10	10
Central Oklahoma A	Rose State	0	0	10	10
Tulsa A	Oklahoma	10	0	10	20
Clemson C	Auburn C	0	0	10	10
Clemson B	Vanderbilt A	10	0	10	20
Montevallo	Emory A	0	0	10	10
Georgia A	Vanderbilt C	0	0	10	10
Alabama A	Georgia Tech A	10	0	10	20
Georgia Tech B	Georgia Tech D	10	10	10	30
Georgia Tech C	Sewanne	10	10	10	30
Auburn A	Georgia Tech E	0	0	10	10
Auburn B	Georgia Tech F	10	10	10	30
Mississippi State A	Vanderbilt B	10	0	10	20
Clemson A	Tennessee B	10	0	10	20
Tennessee A	Chipola College	0	10	10	20
Edinburgh C	Durham D	0	0	10	10
Durham B	Edinburgh A	10	0	10	20
Durham C	Edinburgh D	10	10	10	30
Durham A	Edinburgh B	10	10	10	30
Cambridge B	Bristol	10	10	10	30
Cambridge A	Birmingham	0	10	10	20
Cambridge C	Southampton	0	0	10	10
Cambridge D	Warwick	10	0	10	20
Cambridge E	Imperial B	10	10	10	30
LSE	Imperial A	0	0	10	10
Imperial C	Cardiff	0	0	10	10
Imperial D	Oxford	10	0	10	20
Sheffield B	York	0	0	10	10
Binghamton B	Cornell A	0	0	10	10
Binghamton A	Cornell B	10	10	10	30
ESF	Cornell C	0	0	10	10
RIT B	Binghamton C	0	10	10	20
Cornell D	Rochester	10	10	10	30