At what distance from a 2.45*10^-6 C charge will the electric field be 100 N/C

An object has a weight of 500 on earth what is the mass of this object

Gunpowder residue is most likely to show up where on a shooters hands

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.