The afternoon of March 23, 2022, Shenzhou XIII crew astronauts Zhai Zhigang, Wang Yaping, Ye Guangfu cooperate with each other to carry out lectures, on-rail demonstration of the space "ice" experiments, liquid bridge demonstration experiments, water-oil separation experiments, the space throw experiments and other four experiments .

"Space ice ball" experiment

Take out the water bag with supersaturated sodium acetate solution, and then gently squeeze, a liquid ball with blisters slowly from the mouth of the tube "run"! and hovered inside the space station. Immediately after touching the liquid ball with a stick coated with powder, the liquid ball with blisters began to "freeze". Wang Yaping demonstrated this amazing physical phenomenon during the "ice" experiment in space.

Water and oil separation experiment

Astronaut Wang Yaping took a bottle containing two kinds of liquid, drinking water on top and yellow cooking oil below. Wang Yaping shook the bottle, the bottle of water and oil actually mixed together, the results of this experiment greatly exceeded our cognition, on the ground when the two liquids are mixed, the oil will float above the water, because the density of water is greater than the density of oil, thus forming a stable layering phenomenon.

Because there is no gravity or buoyancy in space, when you shake the bottle, the oil becomes small droplets, evenly dispersed in the water, and once dispersed, it doesn't separate.

Liquid Bridge Demonstration Experiment

This experiment is to observe the "tension" of water in the space station, in the space station, the astronaut Wang Yaping took two water balloon liquid bridge board slowly close, when the two water balloons touch together, and then the liquid bridge board slowly pull away, the water balloon is like sticking together. The water balloon is like sticking together, "pulling" a dozen centimeters has not been separated, so simple to pull the water bridge a dozen inside, which on the ground is by no means possible, and the astronauts also showed us in the space station wringing with water towel will appear the results - water will not fall, will not splash! Instead, it wraps around our hands like a thin film glove.

The Space Throw Experiment

The astronauts held an object on the station and threw it with such force that when there was no obstruction to the object, it did not fall, and the object glided in the direction of the force. This is the most intuitive manifestation of the space station's microgravity environment.

In the microgravity environment of the space station, an object will keep moving at a constant speed in a straight line when it is almost unaffected by external forces, or when there are zero external forces, but the physical images behind this experiment are very interesting.