Multiple choice

Why is it easier to swim in a sea than in a river?

  1. Density of sea water is more than that of river water

  2. Sea water is will while river water is running

  3. Salinity of sea water is more than that of river water

  4. None of the above

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The higher density of seawater provides greater buoyant force, making it easier to float. Sea water density is approximately 1025 kg/m³ compared to freshwater's 1000 kg/m³ due to dissolved salts and minerals, which increases the upward buoyant force on the body.