An oxygen ion has 8 protons and 10 electrons. Its net charge is negative 2 (-2). If an electron has a charge of negative 1.6 x 10⁻¹⁹ Coulomb, calculate the net charge of the oxygen ion in terms of coulombs.

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

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.

What sort of waves exhibit the doppler effect?