I did not pinch off the opening of the vent after putting it into the freezer. I made a cone of al. foil and poked it up through the covering sheets. The bottom of the cone may have been under the water to start, but I think it fell over because the cone did not freeze into the block.
Are...
I tried to make a large clear ice cube yesterday, but the result is not satisfactory.
I used a 20 cm x 30 cm aluminum roasting pan, and put 4 l. of distilled water in it. I covered this pan with aluminum foil, including a vent tube as suggested. This cover, of course, was not air tight. I do...
Is it possible to make very clear ice in a home freezer?
Tap water ice is often cloudy white, which I think comes from minerals in tap water. Making ice with distilled water is a pretty conclusive experiment, I think.
However, the ice cubes I make with distilled water still have many small...
so he thought that when you were on a steadily moving ship and you dropped a coin from your hand, the reason it hit you on the foot was that both you and the ship were moving relative to absolute space?
Did Newton think there were mechanical experiments that could determine absolute motion?
I'm re-reading Greene's The Fabric of the Cosmos. He describes Newton as explaining his (Newton's, not Greene's!) thought experiment of the bucket by the existence of absolute space: something with respect to which rotating objects rotate, even in seemingly empty space.
Did Newton ever...