Why does water stay in the cup when you put paper on top?
A cup is filled to the brim with water. A paper is placed right on top of the cup. The cup can be turned upside down, the paper stays in place, and no water spills. How is this possible?
Answer:
it is because of pressure, perticularly air pressureDouble arrows in chemical equations?
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Answer:
it is because of pressure, perticularly air pressure