What do you mean by water?

What do you mean by water? It means that the diver floats from the water to the surface with his head out of the water.

The movement of missiles and other objects from underwater through the interface between water and air into the air (see figure). In the late 1940s, missiles were launched from underwater, which promoted the study of water outlet. The missile launched by the submarine flies to the target through the interior trajectory, underwater trajectory, water exit process and air trajectory of the launch tube.

The gas used for launching sometimes follows the missile and is discharged from the launch tube, which affects the underwater trajectory and the process of leaving water of the missile. Submarine motion (including forward, pitch and roll) and ocean current also have an influence on the underwater trajectory and water exit process of missiles. After the underwater missile leaves the launch tube, steam cavitation usually occurs on the shoulder.

The irregular change of cavitation separation line and the irregular leakage of vortex cavitation from missile surface have great influence on exit trajectory, which increases the dispersion of missile attitude angle (the angle between missile axis and vertical) after exit. Since the tip of the projectile approaches the free water surface, the influence of the free water surface on the water outlet process can not be ignored.

When the missile passes through the free surface, the water resistance will suddenly decrease, and it is often asymmetric with respect to the missile body, which will cause ballistic turning. The missile effluent is also affected by waves, which further increases the randomness of the effluent process. The key to study the problem of leaving water is to determine the attitude angle and velocity change law of missiles after leaving water.

The meaning of water lotus:

Basic information Chinese scientific name: Shuifurong Pinyin: chushuifurong Latin scientific name: HelianthusannuusL. Other names: water hibiscus sunflower, Helianthus: angiosperm: dicotyledonous plants: Campanulaceae: Compositae subfamily: Tubular Flower subfamily: Helianthus: Morphological characteristics of Helianthus.

Hibiscus emerging from the water belongs to the middle-low early maturity type, with many branches and lemon yellow flowers. Growing habits.

Sunflower hibiscus is native to North America and is now cultivated all over the world. Can be planted in the courtyard, reading glasses, flower beds to watch.

Explanation: Lotus: Lotus. Newly opened lotus. Metaphor poetry is fresh and beautiful. It also describes a natural and gorgeous woman.

From: Liang Zhongrong's Southern Dynasties Poems: Xie Shi is like a hibiscus, and his face is like gold.

Example: Ma Jiao is graceful and has a beautiful head, like a willow in spring and a willow in the moon. It is really a charming word. ◎ Qing Yu Huai's Banqiao Miscellanies Ma Jiao.

Grammar: formal; Become an object; Describe a young woman.