schoolscienceproject.blogspot.in
Flying coin
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.
No comments:
Post a Comment
schoolscienceproject.blogspot.in