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More ways to get Braingle...

Floating Rocks

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

 

Puzzle ID:#19287
Fun:*** (2.28)
Difficulty:** (1.31)
Category:Science
Submitted By:AXTONAau****!!
Corrected By:Winner4600

 

 

 



As Axton and his good mate G were driving along the mighty River Murray, Axton said, "I bet you I can make a rock float on the River." G said, "That's impossible! I bet you $10 you can't."
Axton drove home with the $10 in his pocket.

How is this possible?




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Comments

I_am_the_Omega**
Nov 06, 2004

I was thinking that he pinched the $10 from his friend anyways.. but i guess your answer's better hehe
bookworm696**
Jan 16, 2005

i got this one too. cool lol. well anyways good try
theketchupwins*
Feb 13, 2005

pretty easy, but a good idea none the less.
Gandalf**
Feb 14, 2005

pretty easy
xx_werecat_xx
Mar 18, 2005

I figured he already had 10 bucks!
But, no you guys have to go and get PUMICE! I knew that!
stevier316*
Apr 15, 2005

Studied most of the principals in the science braingles.
Nicholle*
Apr 22, 2005

I knew this... In third grade when we studied rocks we got some, i think it was pumice, and it floated. Is it true that if you had a big enough bathtub, the planet Saturn would float? My brother told me that one.
shandela**
May 02, 2005

I learned about this 15 years ago from the Magic School Bus Book. Those were my favorite books. I love science.
bigSWAFF_69_Aus*
May 18, 2005

the way that u worded it made it seem that the Axton could have already had $10. But, my first thought was "river rock" (i think that is a name for that krap) but i knew it would be that porusy stuff. (does porusy fit here?)
onlyeeyore**
Jun 07, 2005

I guessed volcanic rock, so I'll give myself half-credit. Good teaser!
toupsy121
Jun 29, 2005

i got it right. i think that satturn might floar because it is a gas planet. depending on what the gasses are and what the core is made of it could float.
toupsy121
Jun 29, 2005

but of course the bath tub would have to be on jupitor because on earth, satturn would everwhelm earth gravity and satturn would become down to satturn wuld have water running on it.
norcekrius*
Jul 01, 2005

Geez, I had several other answers. First of all, pumice isn't the only rock with a practical density less than 1. Also, we have a number of carved rocks at home whose displacement is greater than their weight. Next, he could place a common rock in a water craft and fulfill the bet.

Outside the puzzle's given category, though, was my first thought. Grab a picnic table on the river (next to the river, physically on the bank). Pull out your ice cream and selzer, put them in a glass, and add a rock -- one rock float!
sweetime**
Jul 22, 2005

the teaser states that he could MAKE a rock float in the river, not that he could find a rock that would float in the river.
if it's simply a matter of MAKING the rock float, he could place it on a raft, put a small rock in a sealed and otherwise empty container, etc....
bookworm91**
Nov 10, 2005

well my first thought was pumice. but then, we have a pool and we clean the sides with pumice....its fun watching it float around. so even if there are other possible answers, pumice fits. therefore the teaser is perfectly fine. i liked it. that;s all that counts. (lol)
rkaalandAus*
Dec 10, 2005

Good One!!!
VudluxiA*
Jun 01, 2006

What if we're all just floating about in a giant bath tub - I think God would have pulled the plug by now
vbguy101*us*
Aug 20, 2006

It's also really lightweight.
jsdodgersAus*
Sep 29, 2007

Way to easy, boring one, almost put me to sleep.



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