compression - 2025 ACF Fall

Packet C: Tossup 15

This process is performed on saturated liquids like R22 before condensation and throttling steps in most air conditioners. This process (10[1])is performed immediately before (10[1])a spark plug (10[2])ignites (10[3])fuel (10[3]-5[1])in a (10[1])four-stroke (10[10]-5[1])engine, (10[9]-5[4])while it causes (10[1])autoignition (10[6]-5[1])in (10[1])diesel (-5[1])engines. (10[6]-5[3])Air (10[1])undergoes (10[2])this (10[1])process (10[4])at every (10[1]-5[1])peak (10[1])of a sound (-5[2])wave. (10[7]-5[2])The (10[2])surroundings (10[7])do positive PV (10[1])work (10[1])on the system (-5[1])in (10[1])this process, (10[1]-5[1])which (10[1])occurs in the last (10[1])two steps (10[1]-5[1])of the Carnot (“kar-NO”) cycle. (-5[1])This process, which increases pressure by Boyle’s law, (-5[1])is (10[1])performed (10[1])by lowering a piston and typically (10[1])follows (10[1])an (10[1])expansion step. (10[3])For 10 points, name this process (-5[1])in which a gas is forced into (-5[1])a smaller volume. (10[2])■END■ (10[18]0[2])

ANSWER: compression [accept vapor-compression refrigeration]

<Editors, Physics> | Packet C

= Average correct buzzpoint

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Buzzes

Player	Team	Opponent	Buzzpoint	Value
James Xiao	Toronto A	Toronto H	19	10
Graham Dirks	Kansas State A	Nebraska A	23	10
Kenneth Moeller	ERAU Daytona A	Florida B	26	10
James Stadler	Imperial B	Cambridge E	26	10
Henry Nonnemaker	CWRU C	Louisville C	27	10
Saswat Sasha Tripathi	Chicago A	Illinois Orange	27	10
Tal Bowen	Durham A	Edinburgh B	27	10
Ethen Sun	Toronto C	Toronto F	28	10
Dawson Teu	Waterloo A	Queen's A	28	-5
John Shelley	Clemson B	Vanderbilt A	28	10
Peter Smith	Binghamton A	Cornell B	28	10
Ben Lanahan	Clemson A	Tennessee B	30	10
Malcolm Meyn	McGill C	Ottawa B	31	10
Nishad Joshi	Kentucky	Louisville B	31	10
Matthew Wozniak	Michigan B	Ohio State C	31	10
Xavier Bornhorst	Maryland A	George Mason C	31	10
Leonard Castine	Penn	NYU C	31	10
Rohit Chintala	Maryland B	Rutgers A	31	10
Daniel Craig	Rutgers B	Vassar A	31	10
Ethan Ma	Illinois Blue	Purdue D	31	10
Brian Qian	Illinois Canada	WashU Grolars	31	10
Misty Chen	Purdue C	WashU Grizzlers	31	10
Nathan Whittington	Tennessee A	Chipola College	31	-5
Vijay Hans	Berkeley Boss Bandit	UCSC	32	10
Aaryan Sumesh	Berkeley Archer Queen	Berkeley Little Prince	32	10
Drake Smith	Carleton A	McGill B	32	10
Will Marcotte	Toronto D	McMaster C	32	-5
Ryan Gomes	Florida Tech A	UCF A	32	10
Owen Banks	Duke A	William & Mary A	32	-5
Beckett Pursey	Purdue B	Illinois Champaign	32	10
Surya Dinesh	MIT A	Tufts A	32	10
Nolan King	Nebraska C	Murray State College A	32	10
Mitchell Hackett	Central Oklahoma A	Rose State	32	-5
Coy Mier	Auburn B	Georgia Tech F	32	-5
Benjamin Turner	York	Sheffield B	32	10
Derek Li	Cornell A	Binghamton B	32	10
Platon Gorokhov	Toronto E	Brock A	35	10
Ty Brennan	Berkeley Mighty Miner	Stanford B	36	10
Thomas Wu	Berkeley Skeleton King	Stanford A	36	10
Levan Tsiskarisvili	JMU B	UNC B	36	10
Alex Dzurick	William Woods University A	Iowa B	36	10
Drew Wetterlind	Iowa State	Wisconsin C	36	10
Kaushik Jayaprabha	Dartmouth C	Amherst A	36	-5
Oliver West	Cambridge B	Bristol	36	10
Ben Simmons	Macalester	St. Thomas	37	10
Joshua Lam	Ohio State B	Michigan A	38	-5
Charlie Ruff	McGill A	McGill E	39	10
Mackenzie Tott	Columbia A	George Mason A	39	-5
Auburn Carter	Murray State College B	Central Oklahoma B	39	10
Justin Gilbert	Auburn C	Clemson C	39	10
Ronak Kelkar	Georgia Tech C	Sewanne	39	10
Veer Vanmali	Mississippi State A	Vanderbilt B	39	-5
Jack Disbury	Durham D	Edinburgh C	39	10
Siheon Lee	Imperial C	Cardiff	39	-5
Alex Forman	Cornell D	Rochester	39	10
Rafa Travis	Durham C	Edinburgh D	40	10
Nathan Redford	Liberty A	Virginia Tech A	41	10
Alex Smits	Wisconsin A	Michigan Tech	41	10
Caleb Rowe	Nebraska B	Kansas State B	42	10
William Erwin	William & Mary B	NCSU A	43	10
Davis Johnson	Purdue A	Illinois Urbana	43	10
Nikhil Nair	Boston University B	UConn A	43	10
Nayaaz Hashim	Oxford	Imperial D	43	10
Miles Phillips	Florida Tech B	South Florida A	45	10
Andrew Boardman	Cambridge D	Warwick	45	-5
Tishe Sonuga	Chicago B	Iowa A	46	10
Nico Pascual	Michigan State B	WVU A	49	-5
Steven McPhillimey	Lehigh A	Columbia B	49	-5
Victor Xu	Toronto B	Toronto I	50	10
Kelvin Ni	NYU A	Stony Brook	50	10
Trenton Burgess	Indiana A	Rose-Hulman A	50	10
Anastasia Thacker	Wisconsin B	Minnesota	50	10
Ethan Young	Williams A	Harvard	50	10
Thomas Newill	Tufts C	Boston University A	50	-5
Johnny Myers	Williams B	Vermont A	50	-5
Nolan Travers	Tulsa A	Oklahoma	50	10
Eli O'Sick Johnson	Binghamton C	RIT B	50	10
Oliver Thompson	CWRU D	Louisville D	51	10
Magnolia Schnirman Barría	NYU B	George Mason B	51	10
Corey Pope	Florida State A	Florida A	52	10
Kevin Cronk	Virginia Tech C	Liberty B	52	10
Vedang Singhal	UNC C	JMU A	52	10
Indigo Khanna	Vermont B	Dartmouth A	52	10
Jackson McDonald	Alabama A	Georgia Tech A	52	10
Anirudh Terdal	LSE	Imperial A	52	10
Gregory Stone	ESF	Cornell C	52	10
Akif Ismail	Williams C	Brown A	55	10
Aeron Wheel	Cardiff	Imperial C	56	10
Charlotte Nicholas	Durham B	Edinburgh A	59	-5
Pratham Bhanushali	WVU B	CWRU A	60	10
Jackson Price	Dartmouth B	Brandeis Bach	62	10
Antara Bhattacharya	Cambridge A	Birmingham	62	-5
Kevin Nolan	NCSU B	Virginia Tech B	63	10
Gavin Ge	Waterloo B	Guelph A	67	10
Andrew Harms	Michigan State A	Ohio State D	69	10
Andrew Heller	Georgia Tech E	Auburn A	69	-5
Daniel Chen	Emory A	Montevallo	73	-5
Zac Stapler	Pittsburgh	Michigan State C	81	-5
Emily Snider	Liberty C	Virginia A	82	10
Joanna Xiao	Georgia Tech B	Georgia Tech D	83	10
Kyle Hart	MIT B	Boston College B	89	10
Nick Smemoe	UNC A	Tusculum A	90	10
Edward Zhang	Vanderbilt C	Georgia A	91	10
Christian Humeniuk	McMaster A	Waterloo C	93	10
Taran Knutson	Michigan A	Ohio State B	93	10
Mata Cooper	Southampton	Cambridge C	93	10
Bailey Lacefield	Toronto G	McMaster B	99	-5
Ben Spirtas	Maryland C	Rowan	106	-5
Adithya Parat	McMaster C	Toronto D	109	10
Brendan Bridle	Queen's A	Waterloo A	109	10
Rebecca Li	Ottawa A	Carleton B	110	10
Elena Yarrington	Michigan State D	Louisville A	110	10
Chase Moss	WVU A	Michigan State B	110	10
Samuel Li	William & Mary A	Duke A	110	10
Matthew Bucek	George Mason A	Columbia A	110	10
Cooper Morris	Columbia B	Lehigh A	110	10
Alexander DaGrossa	Rowan	Maryland C	110	10
Jack Granahan	Brandeis Mozart	Brown B	110	10
Anthony Xu	Amherst A	Dartmouth C	110	10
Jaehyun Park	Boston University A	Tufts C	110	10
Cy Stavros	Vermont A	Williams B	110	10
Ayden Gates	Rose State	Central Oklahoma A	110	10
Ian Hatcher	Chipola College	Tennessee A	110	10
Andrew Wilson	Montevallo	Emory A	110	10
Gabrielle Smith	Auburn A	Georgia Tech E	110	10
Shivam Saxena	Georgia Tech F	Auburn B	110	0
Jerry Lin	Vanderbilt B	Mississippi State A	110	10
Abbie Isabel	Edinburgh A	Durham B	110	0
James Mogg	Birmingham	Cambridge A	110	10
Harry Crane	Warwick	Cambridge D	110	10

Summary

Tournament	Edition	Match	Heard	Conv. %	Neg %	Avg. Buzz
Northern California	Main	✓	4	100%	0%	34.00
Eastern Canada (1)	Main	✓	4	100%	0%	53.00
Eastern Canada (2)	Main	✓	9	89%	33%	63.75
Florida	Main	✓	4	100%	0%	38.75
Great Lakes	Main	✓	10	90%	30%	64.67
Lower Mid-Atlantic	Main	✓	9	100%	11%	63.22
Upper Mid-Atlantic	Main	✓	9	100%	33%	61.67
Midwest	Main	✓	9	100%	0%	36.33
North	Main	✓	4	100%	0%	41.00
Northeast	Main	✓	11	100%	27%	74.82
South Central	Main	✓	6	100%	17%	49.33
Southeast	Main	✓	12	92%	42%	72.91
Upstate NY	Main	✓	5	100%	0%	40.20
UK (North)	UK	✓	5	80%	20%	34.50
UK (South)	UK	✓	8	100%	38%	65.75