Throughout this question, assume that the universe the universe only contains matter and a possible cosmological constant. use the definition of the density parameter to show that at any epoch we can write the matter density as e the matter density as male) (1 z)3 ω0ho .

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i. e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o