|
|
|
|
TimRuns
Member
|
|
|
Joined: 11 May 2003
Posts: 10062
Location: Coquitlam, British Columbia
|
| Back to top
|
|
 Posted: 08/19/03 - 17:45 Post subject: Answer to Science Quiz Question
Here's the verdict: For the minority of you who picked "the same", you are CORRECT!!! I'm surprised that no one picked the first answer b/c that seems like the most obvious one. The reason why the water level is the same is b/c the volume of water displaced by the ice cube is equal to the ice cube itself. The ice cube therefore creates a depression on the water surface on which it sits. The depression is equal to the volume of the ice cube. When the ice melts, the "hole" gets filled up gradually with liquid water until it is full (ice is completely melted and is replaced by an volume of liquid water identical to that of the ice so no change in water level results)
|
|
|
|
|
cherylpf
crazy cat lady
|
|
|
Joined: 14 May 2002
Posts: 17304
|
| Back to top
|
|
Posted: 08/19/03 - 17:50 Post subject:
I voted 'stay the same'  What do I win?
even though I couldn't explain why and when I read TriBob's response that almost made sense I almost rethought my answer... 
|
|
|
|
|
TimRuns
Member
|
|
|
Joined: 11 May 2003
Posts: 10062
Location: Coquitlam, British Columbia
|
| Back to top
|
|
Posted: 08/19/03 - 17:53 Post subject:
| cherylpf wrote: | I voted 'stay the same' What do I win?
even though I couldn't explain why and when I read TriBob's response that almost made sense I almost rethought my answer... |
The honorable Riff Raff Nobel Prize!
|
|
|
|
|
TriBob
Member
|
|
|
Joined: 29 Aug 2002
Posts: 5771
Location: Lost in Transition
|
| Back to top
|
|
Posted: 08/20/03 - 09:27 Post subject:
I beg do differ. When water freezes, its volume increases by 9%. therefore when ice melts the molecules will take up less space displacing less water then when in solid form.
See: Which is more dense - Ice or Liquid Water?
|
|
|
|
|
Running Brewer
Member
|
|
|
Joined: 12 Oct 2004
Posts: 3872
Location: Santa Poco
|
| Back to top
|
|
Posted: 08/20/03 - 10:36 Post subject:
I'm with Tribob. Water expands as it freezes there it would decrease in volume when it melts.
By the way this is why rocks will explode in the winter time if they have water trapped inside them.
|
|
|
|
|
TimRuns
Member
|
|
|
Joined: 11 May 2003
Posts: 10062
Location: Coquitlam, British Columbia
|
| Back to top
|
|
Posted: 08/21/03 - 01:37 Post subject:
| TriBob wrote: | I beg do differ. When water freezes, its volume increases by 9%. therefore when ice melts the molecules will take up less space displacing less water then when in solid form.
See: Which is more dense - Ice or Liquid Water? |
I'm referring to the overall water level in the glass- whether or not it stays the same or fluctuates when the ice melts into liquid water.
|
|
|
|
