A sphere of radius R has a (non-uniform) volume charge density of rho = A r 3 . a) What is the unit of A. b) Calculate the total charge of the sphere. c) What is the electric filed outside of the sphere? d) What is the electric field inside of the sphere? (20 points) 5) Find the potential energy of the sphere in problem (4)

Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

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.