Multiple choice

When a ship goes down from river to sea, it rises up a bit because ___.

  1. sea water is slightly hotter

  2. velocity of the ship is greater in the sea

  3. density of sea water is greater

  4. density of salt water is lesser
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

According to Archimedes' principle, buoyant force equals weight of fluid displaced. Sea water has higher density than river water due to dissolved salts, so less volume needs to be displaced to balance the ship's weight.

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