If you have a plate with sand and a plate without sand and you wont to get the sand to the other?

I think you should know one thing about science: it must be rational when using human logics. The question of yours is no problem, but it's lack rational thinking. I'm not saying the answer is impossible, but what for? Science is not merely scientific in answering questions, but should consider the use of it. It's like pumping a tire. When you can just do it, why thinking about the principal of science that work when pumping a tire?