Braingle: 'A Chilly Wager' Brain Teaser

A Chilly Wager

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

Puzzle ID:	#31797
Fun:	(2.92)
Difficulty:	(1.3)
Category:	Science
Submitted By:	spookboy0

One day, Bob and Hannah were sitting out on their deck, sipping on some drinks. Bob ran into the house, got an empty two-liter bottle from the freezer and a quarter, and returned to the deck.

"I bet you money that this quarter will move with nobody touching it."

Hannah thought this was a sure win, however, she lost. When Bob placed the quarter on the mouth of the bottle, the quarter began jumping on one side and making popping sounds.

How did Hannah lose?

Answer

As the bottle had previously been in the freezer, the cool air inside expanded when placed in a warmer temperature and escaped through the only out, or the mouth. However, while the quarter was blocking this passage way, the cool air could not leave. Therefore, the expanding cold air moved the quarter enough so a little cool air could come out of the bottle. The popping sounds were from the quarter landing back on the bottle.
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Comments

Winner4600 Jul 16, 2006	I love these Bob/Hannah teasers!!!
vbguy101 Aug 18, 2006	I knew this one!
love_____xoxo Aug 19, 2006	this was rlly fun!
Roman Sep 03, 2006	I knew that!
Trishgal Sep 20, 2006	Idid not know know that , but I was able to guess thatfrom all the clues.
bluehawk Sep 20, 2006
OldChinaHand Sep 20, 2006	Science can be fun and profitable. Nice little teaser.
wordlover Sep 20, 2006	didnt know that. i thought that it was a trick and he just moved the bottle instead of the quarter. oh well.
utnative Sep 20, 2006	i got the answer right, but then thought maybe the girl bet it would not move. now i am all muxed up i can't even spell comfused that was a lovely traser or what ever. don't a codin pain killer riright after thakinf codin cough medicine. i'm ca]]ing my daughter really lover your which a ma call it
skipcat Sep 20, 2006	i had known the answer but found it simple fun... i finally got one without hurtin my brain
bradon182001 Sep 20, 2006	I'm definitely not into science, I leave that to the scientists. Didn't even try to figure this out. Sorry.
Badger Sep 20, 2006	I would have dropped 2 Mentos candies into a two liter bottle of Diet Coke, and bet that I could launch the quarter into the neighbor's back yard (without touching it)! Also a pretty safe bet. PS: Wear safety glasses, kids!
Scitchr Sep 20, 2006	An old one, but fun
Pizzazz2u Sep 20, 2006	Science is a marvelous category, which will trick more people than others may think. Totally Awesome teaser, too! Keep learning and keep up the scientific fun.
iteachkids Sep 20, 2006	I got it, I GOT it!!! -I only have one question - WhyTheHeck did he have an empty bottle in the FREEZER??? Thanks for a fun one!
locutus13ds Sep 20, 2006	Pretty good teaser. i thought it had to do with a vacuum created.. Oh well
poisonivy9494 Sep 20, 2006	i didnt get it at first but then i did great one!
Qrystal Sep 20, 2006	oo, science, yum. I got it! I'm looking forward to the next Science Teaser of the Day!
marschie Sep 20, 2006	My first answer: "Hannah lost graciously." Then I got the right answer!
jcann Sep 20, 2006	I've done this with my 3rd grade students. They are always amazed! Thanks for a teaser I could relate to--I'm not usually that good with the science ones.
kman613 Sep 20, 2006	easy one - i always love the science riddles.
luvdoritos706 Sep 20, 2006	yeah...that was easy....this is the 1st science 1 ive seen....i like....
calmsavior Sep 20, 2006	yeah! i read this in a Bill Nye book.
calmsavior Sep 20, 2006	[long time ago]
jabdr Sep 20, 2006	Fun teaser...I almost sorta got it
c_rae Sep 20, 2006	Fun teaser! I think I will try the mentos in the diet coke with my kids; I'm sure they will enjoy it!
tdbrsun Sep 20, 2006	excellent!
FeaerFactorY666 Sep 20, 2006	nice!
spookboy0 Sep 20, 2006	Besides icann, has anyone else tried this? And why did he have an empty two-liter bottle in the freezer? So he could win the bet.
lmurray Sep 21, 2006	THIS WAS FOR KIDS
tonjawithaj Sep 21, 2006	lmurray- Good one!
vlerma Sep 24, 2006	Since I have been having frig problems, freezing everything this one came pretty easy for me. Good science project.
ky123212 Nov 10, 2006	Oh, very interesting! I loved this one.
luckyduck May 05, 2007	hahahaha! that's really cool! I never knew that could happen! I should try it sometime. Nice teaser.
bestgirl Sep 20, 2009	My goodness! Am I the only one up today?? I didn't get it. No good at science.
auntiesis Sep 20, 2009	I got it, and thought it was easy for a change. Really good one for the grandkids.
UptheHill Sep 20, 2009	NICE1!!!
avonma Sep 20, 2009	I couldn't think of the answer right away, so I had to peek! I couldn't wait to see the answer. Fun. Good one!
hubbamutt777 Sep 21, 2009	AWESOME TEASER!! i luvd it!!!! didn't get it. im a wimp like that. i read it, try 4 about 2 seconds, then click 'ANSWER"
isaihtb Dec 05, 2009	Can't you just put the coin on the bottle and then bet. You said nobody had to TOUCH IT. After that. you slide the bottle only touching the bottle but not the coin
quizwizAhn Jul 11, 2010	I think this one is too boring. I did this experiment in science class when I was in fourth grade or something
Babe Sep 20, 2012	That's an old one, but then so am I. Kidding aside it was easy if you have heard it before as some of us have.
cutebug Sep 20, 2012	Very old and easy.
gaylewolf Sep 20, 2012	Good puzzle - thanks! But, as usual the comments were even better!