The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

An object's buoyant force and weight mean the same thing.a. trueb. false

What effects result when there is an impact between earth and an asteroid? check all that apply. a.massive flooding. b.extinction of many life forms.c.major earthquakes change in average global temperature.d. giant dust cloud