The half-life of a certain element is 100 days. how many half-lives will it be before only one-eighth of this element remains?

Subduction zones occur on earth where dense oceanic crust dives under more buoyant continental crust. these boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. all of this is further evidence for the a) big bang theory b) origin of the species eliminate c theory of plate tectonics d theory of natural selection 4 sedimentary rocks found high in the himalayen mountain

Why does a cake rise when you bake it? ♡

Newtons second law deals most cosely with