A scuba tank, when fully submerged, displaces15.7 Lof seawater. The tank itself has a mass of13.5kgand, when "full," contains 3.20kgof air. The density of seawater is 1025 kg/m3. Assume that only its weight and the buoyant force act on the tank.

Part A
Determine the magnitude of the net force on the fully submerged tank at the beginning of a dive (when it is full of air).
Part B
Determine the direction of the net force on the fully submerged tank at the beginning of a dive (when it is full of air).
Part C
Determine the magnitude of the net force on the fully submerged tank at the end of a dive (when it no longer contains any air).
Part D
Determine thedirection of the net force on the fully submerged tank at the end of a dive (when it no longer contains any air).

Upward or Downward?