Brain Teasers
A Chilly Wager
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?
"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.Hide Answer Show Answer
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Comments
I love these Bob/Hannah teasers!!!
I knew this one!
this was rlly fun!
I knew that!
Idid not know know that , but I was able to guess thatfrom all the clues.
Science can be fun and profitable. Nice little teaser.
didnt know that. i thought that it was a trick and he just moved the bottle instead of the quarter. oh well.
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
i had known the answer but found it simple fun... i finally got one without hurtin my brain
I'm definitely not into science, I leave that to the scientists. Didn't even try to figure this out. Sorry.
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!
PS: Wear safety glasses, kids!
An old one, but fun
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.
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!
-I only have one question -
WhyTheHeck did he have an empty bottle in the FREEZER???
Thanks for a fun one!
Pretty good teaser. i thought it had to do with a vacuum created.. Oh well
i didnt get it at first but then i did great one!
oo, science, yum.
I got it! I'm looking forward to the next Science Teaser of the Day!
I got it! I'm looking forward to the next Science Teaser of the Day!
My first answer: "Hannah lost graciously."
Then I got the right answer!
Then I got the right answer!
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.
easy one - i always love the science riddles.
yeah...that was easy....this is the 1st science 1 ive seen....i like....
yeah! i read this in a Bill Nye book.
[long time ago]
Fun teaser...I almost sorta got it
Fun teaser!
I think I will try the mentos in the diet coke with my kids; I'm sure they will enjoy it!
I think I will try the mentos in the diet coke with my kids; I'm sure they will enjoy it!
excellent!
nice!
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.
And why did he have an empty two-liter bottle in the freezer? So he could win the bet.
THIS WAS FOR KIDS
lmurray-
Good one!
Good one!
Since I have been having frig problems, freezing everything this one came pretty easy for me. Good science project.
Oh, very interesting! I loved this one.
hahahaha! that's really cool! I never knew that could happen! I should try it sometime. Nice teaser.
My goodness! Am I the only one up today?? I didn't get it. No good at science.
I got it, and thought it was easy for a change. Really good one for the grandkids.
NICE1!!!
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!
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"
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
I think this one is too boring. I did this experiment in science class when I was in fourth grade or something
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.
Very old and easy.
Good puzzle - thanks! But, as usual the comments were even better!
I did not think you had to be a scientist to get this one, but this time around I wondered why he kept empty bottles in the freezer? Weird, I think!! Anyone know why a person would do that? It seems if you want to cool it the refrigerator would to a good enough job. Oh yeah, I forgot...it is just a teaser!
nice and easy
Thermodynamics 101.
Not bad, but who keeps empty two liter bottles in the freezer?
Interesting. I will give this a try and share it with the kids.
Okay, the kids are just an excuse. I'll give this a try and entertain myself.
Okay, the kids are just an excuse. I'll give this a try and entertain myself.
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