| 摘要 |
A game ball is provided with the shape of a football with tubular symmetrically placed holes along the length of the ball. The ball is made of foam and when submerged in water the holes will fill with water. As the ball is thrown in a spiraling rotation, the centrifugal force will cause the water to be expelled through the holes producing multiple spiraling streams of water to spray away from the ball as the ball travels in the air.
|
