Why the Scale Changes When the Orange Touches Water #science #sciencefacts

Added: 2026-05-17

[00:00:00]This experiment demonstrates one of the most important ideas in physics.

[00:00:05]Archimedes principle. At first, the orange is hanging in the air, so the scale barely changes. But the moment the orange touches the water, the reading on the scale suddenly increases.

[00:00:18]Why? Because the water pushes upward on the orange with a force called buoyancy.

[00:00:24]FB equals row GV. The buoyant force equals the weight of the water displaced by the object. As the orange sinks deeper, it pushes more water out of the way. That displaced water creates an upward force on the orange and an equal downward force on the container. So even though the orange is not touching the bottom, the scale still feels the extra force through the water.

[00:00:50]This is the same principle that allows ships to float, submarines to dive, and hot air balloons to rise through