A bathysphere used for deep-sea exploration has a radius of 1.51 m and a mass of 1.22 104 kg. To dive, this submarine takes on mass in the form of sea water. Determine the amount of mass that the submarine must take on if it is to descend at a constant speed of 1.00 m/s, when the resistive force on it is 1097 N in the upward direction. The density of seawater is 1.03 x 103 kg/m3.