A drop of water and gravity

1. The size and shape of water droplets have nothing to do with gravity, because in the free-fall system, gravity has been shielded, and the inside of the free-fall system is an inertial system, so the upper part of water droplets will not exert pressure on the lower part, just like the result of weighing any object with a platform scale in the case of free-fall; The lower part of a water drop will not pull the upper part, just as the result of weighing any object with a spring scale in free fall is zero.

2. The shape of water droplets is related to the viscosity of the medium in the moving space. That is, it is related to air resistance. The shape of water droplets falling freely in the air (almost falling freely, air resistance has an influence, but it has little influence) must be different from that in a dusty space.

3. It is the surface tension of the liquid that plays a decisive role. Droplets falling freely in a vacuum or moving without acceleration in a space without gravitational field (for example, in a spaceship) are absolutely circular in shape.

According to the surface tension of liquids, the droplet sizes formed by different liquids can be accurately and strictly calculated.