buoyancy

     

In physics, buoyancy is the upwar force on an object produced by the surrounding liquid or gas in which it is fully or partially immersed, due to the pressure difference of the fluid between the top and bottom of the object. The net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body. This force enables the object to float or at least to seem lighter. Buoyancy is important for many vehicles such as boats, ships, balloons, and airships, and plays a role in diverse natural phenomena such as sedimentation.

Trivia about buoyancy

  • (Sarah of the Clue Crew demonstrates.) An egg sinks in tap water, but in saltwater, the egg gains this, defined as the upward force of a liquid on an object less dense than itself
  • Tendency to rise or float
  • It's the tendency of an object to float, or the upward pressure of fluid in an object