Quantcast

ice cube floating -> water (more of a brain teaser)

BeMo Free Repeat™ On Us + MCAT 520 Challenge™
This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.

theonlytycrane

Full Member
7+ Year Member
Joined
Mar 23, 2014
Messages
2,123
Reaction score
2,273
Screen Shot 2016-07-11 at 7.29.36 PM.png


Water is less dense in solid form than in liquid form. So shouldn't the water level decrease?
 

akimhaneul

Full Member
2+ Year Member
Joined
Dec 2, 2015
Messages
438
Reaction score
23
It's turning back into the liquid form. When it melts, it will put back the volume of water that was displaced for lifting the solid.
 
  • Like
Reactions: 1 users

LIC2015

Full Member
5+ Year Member
Joined
Jul 15, 2015
Messages
106
Reaction score
39
The ice cube's submerged portion occupies the volume of water that is equal to the weight of the ice. Density is irrelevant. If the ice displaces 2 pounds of water, then the ice weighs 2 pounds, and therefore will not displace less or more than that when it melts. Try this: add some ice to a glass of water and mark the meniscus. Check it after the ice melts and if it's any different, let physicists know because you've just done some incredible voodoo witchcraft.
 
Last edited:
  • Like
Reactions: 1 user
Top