1.Which of these household items works by pushing a gaseous coolant into pipes at high temperatures?

Furnace

Gas engine

Refrigerator

Microwave

#	Player	Score	Quizzes
🥇	CuriousExplorer64	509	59
🥈	CuriousExplorer64	477	54
🥉	CuriousExplorer64	462	51
4	CraftyAdventurer17	454	50
5	CraftyAdventurer17	441	49
6	MightyAdventurer23	406	44
7	CuriousExplorer64	383	45
8	SharpPathfinder75	377	42
9	CraftyWanderer97	361	46
10	SpeedyChallenger20	346	37
11	CuriousExplorer64	329	38
12	CuriousExplorer64	268	32
13	Wheeler1001	254	27
14	CraftyAdventurer17	239	26
15	CuriousExplorer64	233	26
16	FearlessVoyager79	229	28
17	CuriousExplorer64	223	27
18	CraftySolver94	204	24
19	CuriousExplorer64	194	22
20	CuriousPuzzler87	190	23
21	CraftyAdventurer17	188	21
22	CuriousExplorer64	172	20
23	CraftyExplorer98	170	21
24	Bubbs64	169	19
25	SavvyPathfinder96	167	18
26	CraftyAdventurer17	164	19
27	MightySolver18	158	18
28	Bubbs64	158	18
29	FearlessExplorer97	156	18
30	CuriousExplorer64	149	18
31	CuriousExplorer64	148	16
32	SneakySeeker67	144	15
33	CuriousExplorer64	136	16
34	CuriousExplorer64	128	15
35	SavvyMaze97	128	13
36	CraftyAdventurer17	128	14
37	DaringPuzzler41	122	15
38	SnappyMargarita14	122	17
39	CraftyAdventurer17	119	13
40	FearlessWanderer73	116	13
41	CleverExplorer28	113	13
42	WittyRunner58	112	13
43	NimbleTrailblazer66	111	12
44	SlyPuzzler40	108	12
45	WittyAdventurer15	108	12
46	CuriousExplorer83	105	18
47	NimbleTrailblazer54	100	11
48	CraftyAdventurer17	99	10
49	WittyPathfinder99	98	11
50	DaringPathfinder41	97	11

#	Player	Score	Quizzes
🥇	CuriousExplorer64	477	54
🥈	MightyAdventurer23	406	44
🥉	CuriousExplorer64	383	45
4	SharpPathfinder75	377	42
5	CraftyWanderer97	361	46
6	SpeedyChallenger20	346	37
7	CuriousExplorer64	329	38
8	CuriousExplorer64	268	32
9	Wheeler1001	254	27
10	CuriousExplorer64	233	26
11	FearlessVoyager79	229	28
12	CuriousExplorer64	223	27
13	CuriousExplorer64	194	22
14	CuriousPuzzler87	190	23
15	Bubbs64	169	19
16	SavvyPathfinder96	167	18
17	Bubbs64	158	18
18	FearlessExplorer97	156	18
19	SneakySeeker67	144	15
20	CraftyAdventurer17	128	14
21	SnappyMargarita14	122	17
22	FearlessWanderer73	116	13
23	CleverExplorer28	113	13
24	WittyRunner58	112	13
25	NimbleTrailblazer66	111	12
26	WittyAdventurer15	108	12
27	SlyPuzzler40	108	12
28	CuriousExplorer83	105	18
29	MightySolver18	102	11
30	NimbleTrailblazer54	100	11
31	CraftyAdventurer17	99	10
32	DaringPathfinder41	97	11
33	CraftyAdventurer17	95	10
34	CuriousExplorer64	94	10
35	CuriousExplorer64	91	11
36	SneakyTrailblazer19	88	11
37	CuriousExplorer64	85	10
38	CuriousExplorer64	83	9
39	DaringPuzzler41	82	10
40	DaringExplorer69	81	9
41	CuriousExplorer64	79	9
42	CuriousExplorer46	79	8
43	WittyTrailblazer13	79	9
44	WittyRunner58	77	8
45	NimbleNavigator36	77	9
46	SlyChallenger65	76	9
47	NimbleTrailblazer54	72	8
48	CraftyTrailblazer51	70	9
49	WittyPathfinder99	69	8
50	SneakyVoyager37	68	9