Zelenskyy says "time to make things right" after tense meeting with Trump Stuck NASA astronauts prepare to return: 'We want to go home' Iceberg twice the size of Greater London runs aground near ...

Hold up a ball of clay about the size of a ping pong ball and ask students if they think it will sink or float in water. Place the clay in the water. Do you think that if I use ½-the amount of clay ...

Place a ball on top of the vacuum cleaner. Turn on the vacuum. Notice that the ball is floating in the air. Replace the ball with a different-sized ball or a plastic bottle. Try floating two styrofoam ...

Some patterns act like tweezers or a "tractor beam" to hold the floating balls in place on the water's surface so they do not drift away. Others cause the balls to spin about on their centers and ...

Researchers manipulated water waves to move ping pong balls with a level of precision that seems straight out of a sci-fi movie.

The method involves generating and merging water waves to create complex surface patterns, such as twisting loops and swirling vortices. Laboratory experiments showed that these patterns can pull in ...

Some patterns act like tweezers or a "tractor beam" to hold the floating balls in place on the water's surface so they do not drift away. Others cause the balls to spin about on their centres and ...