Clarence Zener - 2024 ACF Winter

Question

This scientist names a ratio equal to [read slowly] “2 C-sub-4-4 over C-1-1 minus C-2-2,” which quantifies how anisotropic a material is. For 10 points each:

[10h] Name this scientist who also developed a namesake diode that allows current to reliably flow backwards once a certain reverse voltage is applied.

ANSWER: Clarence Zener [accept Zener ratio or Zener diode]

[10m] Zener and J. Herbert Hollomon created a formula that measures how much this quantity’s rate depends on temperature. The “engineering” form of this value denoted epsilon equals the change in length over the total length.

ANSWER: strain [accept strain rate or engineering strain]

[10e] Zener also developed a model of viscoelastic solids that uses a combination of these devices and dashpots. These devices exhibit a restoring force proportional to their displacement according to Hooke’s law.

ANSWER: springs [prompt on simple harmonic oscillators]

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Summary


2024 ACF Winter at UC Berkeley	2024-11-16	Y	3	23.33	100%	100%	33%
2024 ACF Winter at Clemson	2024-11-16	Y	8	10.00	88%	0%	13%
2024 ACF Winter at Lehigh	2024-11-16	Y	7	18.57	100%	43%	43%
2024 ACF Winter at Northwestern	2024-11-16	Y	9	20.00	100%	67%	33%
2024 ACF Winter at Ohio State	2024-11-16	Y	7	18.57	100%	43%	43%
2024 ACF Winter at Online	2024-11-16	Y	8	17.50	100%	50%	25%
2024 ACF Winter at UBC	2024-11-16	Y	2	20.00	100%	50%	50%
2024 ACF Winter at Central Florida	2024-11-16	Y	5	16.00	80%	60%	20%
2024 ACF Winter at Oxford	2024-11-16	Y	10	21.00	100%	70%	40%

Data


Stanford L	Berkeley A	10	10	10	30
Berkeley C	Berkeley B	0	10	10	20
Stanford M	Stanford A	0	10	10	20
Alabama A	Auburn C	0	0	10	10
Auburn A	Clemson A	0	0	10	10
Emory B	Georgia Tech A	0	0	10	10
Georgia Tech D	Georgia Tech C	0	0	10	10
Georgia Tech F	Emory A	0	0	0	0
Tusculum A	South Carolina A	10	0	10	20
Tennesse A	Georgia Tech E	0	0	10	10
Columbia A	Penn State B	10	10	10	30
Columbia B	Penn State A	10	0	10	20
Rowan A	Johns Hopkins A	0	0	10	10
Penn A	Johns Hopkins B	10	10	10	30
Lehigh A	Princeton A	0	0	10	10
Haverford A	Rutgers A	0	10	10	20
Bard	Rutgers C	0	0	10	10
WashU D	Indiana B	0	0	10	10
Purdue A	Miami	10	0	10	20
Northwestern A	WashU B	0	10	10	20
UChicago C	Notre Dame	0	10	10	20
Indiana A	Purdue C	10	10	10	30
UChicago B	Purdue D	0	0	10	10
UIUC A	SIUE A	0	10	10	20
UIUC C	UChicago D	0	10	10	20
UChicago A	WashU C	10	10	10	30
Pitt A	CWRU B (UG)	10	0	10	20
Kenyon A (UG)	Michigan D (DII)	10	10	10	30
Michigan A	Michigan C (UG)	0	0	10	10
Ohio State A (UG)	Michigan B	10	0	10	20
CWRU A (UG)	Michigan State A	0	10	10	20
Michigan State B (UG)	CWRU D (DII)	0	0	10	10
CWRU C (UG)	Pitt B (UG)	0	10	10	20
Colorado College	Vassar B	0	0	10	10
McGill E	Texas B	0	0	10	10
Missouri	NYU B	10	10	10	30
Vassar A	NYU A	10	10	10	30
Ole Miss	Texas D	0	10	10	20
Texas A	Mississippi State	0	0	10	10
Texas C	Oregon State	0	10	10	20
Iowa	WUSTL A	0	0	10	10
UW B	SFU	10	10	10	30
UW A	UBC B	0	0	10	10
Florida Tech A	Florida Tech B	0	10	10	20
UF E	UCF B	0	0	10	10
UF B	UF C	10	10	10	30
UF A	UF D	0	10	10	20
UF F	UCF A	0	0	0	0
Bristol B	Durham B	0	10	10	20
Bristol A	Cambridge C	10	0	10	20
Imperial B	Durham A	0	10	10	20
LSE A	Cambridge B	10	0	10	20
Manchester	Cambridge A	0	10	10	20
Oxford A	Imperial A	0	10	10	20
Cambridge D	Oxford B	10	10	10	30
Edinburgh	Vanderbilt	0	0	10	10
Birmingham	Warwick A	10	10	10	30
LSE B	Warwick B	0	10	10	20
Georgia Tech B	Georgia A	0	0	10	10