1, mass measurement experiment
Gravity is caused by the attraction of the earth. Because there is no gravity in space, it is impossible to measure gravity with a spring dynamometer. Astronaut Wang Yaping explained that the principle of using weighing equipment in space is to measure the acceleration of body movement by using the constant force generated by the "spring-cam" mechanism and the grating speed measuring system, and calculate the body mass according to Newton's second law (f=ma).
2, simple pendulum movement experiment
The ball on the shelf in space doesn't swing back and forth like it does on the ground. In space, because the ball in weightlessness has no restoring force, it can't swing back and forth, but given a small initial velocity, it can do circular motion around the swing axis, but it needs a lot of initial velocity to achieve it on the ground.
3. Gyro motion experiment
In space, give the stationary gyro a main force, and you will see the movement of the gyro before rolling it. Give the rotating gyro the same force and find that the rotating gyro is shaking forward. Because the high-speed rotating gyro has good orientation, many devices in the space capsule use the principle of gyro orientation.
4. Water film and water polo experiment
In space, water will not flow out by itself. Wang Yaping said: "The poet Li Bai can't write a poem about flying three thousands of feet in space." When the astronaut squeezed out a small water drop, it was suspended in the air. Astronauts also demonstrated how ordinary water forms a water film. Because the surface tension of space water works, the water film will not break easily when it rocks back and forth.
When water is added to the water film, the water film gradually thickens and becomes a water ball. Astronauts also injected red liquid into the water polo with a syringe and found that the liquid slowly dispersed and the transparent water polo became a red water polo.
Space science education will be one of the important functions of the space station;
With the long-term on-orbit operation of China Space Station, China's first space science education brand "Tiangong Classroom" will be launched one after another, with China astronauts as "space teachers", which will be carried out in a coordinated way between heaven and earth. In the future, China will launch a series of space science education activities.
Yang Yuguang, the Space Transportation Committee of the International Astronautical Federation, said that the future teaching content will be more extensive, not only limited to physical and chemical phenomena under microgravity conditions, but also introduce space science research and engineering research.
Second, carry out more in-depth and influential activities. There are already cubic stars made by students in China. With the space launch mission, the space science experiments designed by students can also go to space in the future.