A plastic cube floats in water with exactly one-half of its volume submerged when the container is at rest. The container is then placed in an elevator that accelerates upward at 3.0m/s2. Which statement best describes what happens to the fraction of the cube’s volume that is submerged while the upward acceleration is maintained?
(a) It becomes greater than one-half of the cube’s volume.
(b) The cube sinks completely to the bottom of the container.
(c) It remains one-half of the cube’s volume.
(d) It becomes less than one-half of the cube’s volume.