respectfully, which one might be the shape of the Earth?
A standing bell or resting bell is an inverted bell, supported from below with the rim uppermost. Such bells are normally bowl-shaped, and exist in a wide range of sizes, from a few centimetres to a metre in diameter. They are often played by striking, but some—known as singing bowls—may also be played by rotating a mallet around the outside rim to produce a sustained musical note.
Struck bowls are used in some Buddhist religious practices to accompany periods of meditation and chanting.
Struck and singing bowls are widely used for music making,
meditation and relaxation,
as well for personal spirituality.
When a raindrop crashes into the surface of a puddle... 😉👉🏻the collision causes tiny currents to spin around inside the droplet as well as below the surface of the puddle. If you could peer into the droplet, you'd see water rushing downward along the edges inside the drop and then climbing back up toward the center, That spinning motion inside the droplet, invisible under most circumstances, creates enough force to tug on the air surrounding the droplet.
The air forms into a thin, fast stream of wind that flows under the drop, holding it a hair's width above the surface, however, that those engines — inside the droplet and below the surface of the liquid — don't spin on their own. Heat differences between a drop and the liquid it impacts drive the rotation and the levitation. Once the raindrop warms or cools to the temperature of the puddle — a process sped up by those spinning engines that can take anywhere from milliseconds to seconds — it will crash through its magic rug of air and disappear into the puddle,
The MIT researchers figured out how to calculate the minimum difference in heat for levitation to occur in any given liquid. If the difference is greater than that minimum, they found, the droplet levitates longer. Any shorter, and the drop won't levitate at all.
Through some clever experimental setups and the aid of high-speed cameras, the researchers were able to make some beautiful videos of the levitation engines in action. The scientists mixed some shiny flakes of titanium dioxide into oil, then pinned a drop of that oil against the surface of a larger pool with a syringe. They backlit the drop with a bright LED, and the titanium dioxide lit up as it swirled in the churning currents, following the path of the engines.
