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it will take about 30 seconds to 1 whole minute.
5 seconds
It depends on what height you drop it from.
6minute
A good question might be, "How long does it take a drop of food dye to color a glass of still water?"
Rock caverns are not built they are eroded out of solid rock by natural processes.
about 3 seconds if you drop the phone in water
never
5 months
It depends how wet it is, how heavy the building is, how well built it is, etc
The problem with building castles out of stone is that it would take to long to build.
Depends on where the building is. A permit is required and that permit has to be approved.