'(<a href="http://www.j-archive.com/media/2011-07-06_DJ_14.wmv">Here is the clue. Pay attention to Sarah.</a>) Chairs, a broom, some string, and a can full of sand are all you need for the experiment that creates one of these swinging devices, similar to the one physicist Foucault used to show the earth's rotation'
a pendulum
IT'S A SCIENTIFIC FACT: Chairs, a broom, some string, and a can full of sand are all you need for the experiment that creates one of these swinging devices, similar to the one physicist Foucault used to show the earths rotation
Chairs, a broom, some string, and a can full of sand are all you need for the experiment that creates one of these swinging devices, similar to the one physicist Foucault used to show the earth's rotation
Chairs, a broom, some string, and a can full of sand are all you need for the experiment that creates one of these swinging devices, similar to the one physicist Foucault used to show the earth's rotation
IT'S A SCIENTIFIC FACT
a pendulum
IT'S A SCIENTIFIC FACT