Science Experiments Ideas
Lay a sixpence or a dime four inches from the edge of the table and place a shallow dish eight inches beyond it. How can you blow the coin into the dish!You will never do it if you blow at the coin from the front on the false assumption that the air will be blown under the coin because of the unevenness of the table and lift it up. It will only be transferred to the dish if you blow once sharply about two inches horizontally above it. The air pressure above the coin is reduced, the surrounding air, which is at normal pressure, flows in from all directions and lifts the coin. It goes into the air current and spins into the dish.