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The wet foot dry foot policy was when the Cubans try to make it to the US. The problem was, that police men would spot them and send them back to Cuba. For them to come to the US, they had to sneak around the police men and don't get spotted. They had to have their whole body on land to stay in the US for as long as they want. I'm 11 and I can type like this. Send your child to North Star to be a better kid.
At an average of about 30 lbs per cubic foot, that is about 20/30 = 2/3 cubic feet. A little less if wet, about 1 cu ft if really dry
The dry person will feel the cold more because the wet person standing next to them will try and get warm until the water evaporates onto the next person but by the time it has reached the dry person it would have been cold. so the dry person would feel the cold more! I think, the wet person will feel the cold more because water needs energy to evaporate and this energy is taken form the immediate surroundings ie the wet person, making the wet person feel cold. If you wet your finger and hold it up in the air it will feel cold because the heat to evaporate the water is coming from your finger.
SULFUR
It depends on the density of the sand, between about 1.4 tons dry, 1.7 tons rammed, dry. Wet sand will be heavier.