It may seem straight out of "Star Trek," but it's real: Scientists have created a sonic "tractor beam" that can pull, push and pirouette objects that levitate in thin air. The sonic tractor beam ...

It may seem straight out of "Star Trek," but it's real: Scientists have created a sonic "tractor beam" that can pull, push and pirouette objects that levitate in thin air.

It may seem straight out of “Star Trek,” but it’s real: Scientists have created a sonic “tractor beam” that can pull, push and pirouette objects that levitate in thin air. The sonic ...

However, there are some differences between these types of three-dimensional shapes. Right rectangular prisms are the most common, with real-life examples including buildings, shoe boxes and pretty ...

These labs simplify the real-life conditions that affect structures (shapes), in order to illustrate ... What happens when you push the side of a rectangle? The rectangle is a wobbly, unstable ...