Maybe I’m stupid, but I still don’t get it. Please help me our here if you would. Thank you.
Let’s say I make a canoe out of solid ice and a canoe out of solid concrete, then drill a 6” hole in the bottom of each.
Which one will meet with the bottom of the lake sooner?
The ice canoe will still float. The concrete one will sink faster than....well, a concrete boat with a 6” hole in the hull. I am aware of boats using concrete hulls.
Remember those little ice cubes that had hole in the middle? They floated.
I’m not trying to be sarcastic or mean, just realistic, IMHO. Please correct me if I’m wrong.
Ice floats because it is expanded water, so a block of ice is less dense than the same volume of water. No matter how many holes you drill in ice (or wood or cork or other materials less dense than water) it will float.
Concrete canoes are very thin-walled boats that have a large interior volume of air - so they are overall less dense than the water they displace. If you bore a hole and replace the air with water, it will be overall more dense than the water and it will sink.
You will note that it was the Titanic that sank not the iceberg in that collision a century ago..The Titanic replaced its volume of air with water and the iceberg was still ice.