Quote:
Originally Posted by kp11364
In regard to a recently closed thread about rising water levels, try this:
1. Fill a drinking glass half-full with water
2. Add 2-3 ice cubes. Look at the water level.
3. Put the glass aside; let all the ice melt. You will see that the water level remains the same. Why? Because the amount of water remains the same, regardless of the state of the water.
|
Not true. The density of both water and ice varies with temperature. Ice expands enough that a full plastic bottle of water will burst in your freezer. There are charts of the density of both water and ice at different temperatures and pressures used by design teams. You need to correct the densities for impurities, of course.
The statement seems true because only a (small) glass of water/ice is used and the elder human eye can't discern the change in meniscus. There is a change in volume.