Which One First?
Science brain teasers require understanding of the physical or biological world and the laws that govern it.
If I dropped a bowling ball in a bucket of water which is 45 degrees F, and dropped another bowling ball of the same weight, mass, and size in a bucket at 30 degrees F, both of them at the same time, which ball would hit the bottom of the bucket first?
The ball in the bucket of 45 degree F water hits the bottom of the bucket first. The water in the 30 degree F bucket is frozen.
Oct 06, 2001
|What if the 30 degree bucket doesn't contain water?|
Feb 12, 2002
|Thanks, pal. I tried this and got extremely wet.|
May 29, 2002
|what if the 30 degree bucket contains salt water, so it isn't frozen?|
Nov 07, 2002
Nov 12, 2002
|Oh am I glad I got that right off the bat or else I would be feeling really dumb right about now.|
Feb 12, 2005
|I said 45 degrees, but had no idea the water would be frozen. I'm a Celcius guy.|
Oct 17, 2005
Nov 14, 2005
|Well pedler, I thought quite the oppisite. A classic trick, I liked it. |
Jan 17, 2006
|I think this one kind of belongs in the trick section... Dunno. |
I said they'd both hit at the same time lol.
Mar 15, 2006
|classic trick but ez |
Apr 01, 2006
|oops, all i know is farenheit and i didn't get that. I said heat was irrelevant to gravity.|
Oct 01, 2006
|Right, the freezing point of water is 32 f|
Oct 02, 2006
|If the water isn't frozen, the correct answer is the hotter one. When the ball is in the water, upthrust acts on it. Since the volume of both balls are the same, the magnituce of upthrust soley depends on the density of the fliud. Since water if more dense when cold, a larger upthrust acts on it, increasing time taken to reach the bottom.|
Oct 03, 2006
|I got tricked and I feel like a fool. Good teaser. I need to slow down and pay attention. |
Nov 08, 2006
|I use celcius, always have. I keep hearing all these different farenheit temperatures, but they never stick |
If I were to hear someone had a temperature of 90 something, I'd call the guy a liar and say that they'd be dead
In celcius, water freezes at 0 degrees :-\
Nov 29, 2006
|I said 45 deg water thinking the warmer water would be less dense due to the molicules expanding with heat.|
So I got the answer right, but for the wrong reason!
One of the best teasers I have rated for a while - going on my faves list!
Mar 13, 2007
|I was going through these old teasers and hit this one. I am impressed. I usually nail these right off but you led me down the garden path on this one! Great job! PS. I'm not going to whine about salt water, molecules, etc. These are just for people upset with their inability to get the right answer.|
Jun 23, 2008
|got me the first time I saw it, but this time I got it right away.|
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