Top answers
All subjects
All levels
You are given layers A,F,D,H without knowing their relative or specific age. Write two ways you can know which layer is the oldest.
-
The simpliest way of knowing is when the layers are horizontal, the stratigraphy principle of superposition applies so the top layer is the youngest the bottom layer is the oldest.
Why does an ice skater spin faster when they hold in their arms?
-
This phenomena is a result of the conservation of angular momentum: An isolated system's rotational intertia does not change.
-
Angular momentum is given mathematically by
