Which body system works with the excretory system to regulate fluid levels in the body? A. Nervous system
B. Immune system
C. Reproductive system

2) a cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. which one of the following graphs best describes the buoyant force b on this block as a function of time t if the block just enters the water at time t = 0 s?