A small plastic boat loaded with pieces of steels rods is floating in a bath tub. If the cargo is dumped into the water allowing the boat to float empty, the water level in the tub will
- A. Rise
- B. Fall
- C. Not change
- D. Rise than fall
Answer: B. Fall
Explanation: When steel is in the boat, it displaces water equal to its weight. When submerged, it displaces water equal to its volume. Since steel density > water, volume displaced is less when submerged, so water level falls.