Curated OER
How Fast Does the Sun Spin?
In this rotation of celestial bodies worksheet, learners determine the speed of the sun's rotation and they determine the number of days it takes the sun to rotate once at the equator. They identify the geometric factor that causes...
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Gnomon Model
A gnomon is the part of a sundial that casts the shadow. This simulated experiment illustrates the gnomon over the course of a day.