What are the scientific foresights on the Quest for Landing on the Liuce?

Forward-looking refers to the characteristic of looking far and forward, which is similar to the meaning of foresight. It's about having a long-term view and being able to think about what hasn't happened yet and what is likely to happen.

Word: forward-looking.

Zhuyin: qián zhān xìng

Interpretation: 1. Look ahead: Polar Eye. 2. Prospects; **:Sex.

The Nautilus submarine is a slender spindle-type submarine with a length of 70 meters and a width of 8 meters, which is built according to the Archimedes principle and is powered by electricity. Excellent sailing performance, with a maximum speed of 50 knots.

It is an idealized submarine in which the boat is powered entirely by electricity, which is extracted from seawater, mixed with mercury to form an alloy that replaces zinc in the Bunsen battery cells, and then converts it into electricity and stores it in batteries.

Submarine power plant:

1. Diesel-electric power.

In the early days, it was tried to be used as a submarine power** such as compressed air, manpower, steam, fuel oil, and electricity. And the first kind of submarine power that is truly mature is to use diesel engine and electric motor (diesel-electric) as the common power**.

Before World War I, submarines began to use diesel engines with electric motors as the power of submarines**. This power was the first type of mechanical power for submarines. The diesel engine is responsible for the power of the submarine to navigate on the surface and to recharge the battery**, and below the surface, the submarine uses the electricity that is pre-stored in the battery.

Since the power that can be stored in the battery must be used by the entire ship's equipment, even at a very low speed, it cannot sail under the surface for a long time, and must be recharged on the surface. The subsequent appearance of snorkels increased the submarine's submersible capability.

The snorkel was developed by the Dutch before World War II and later further improved by the Germans and first used on their submarines. The basic structure of the snorkel is simple, it is an elongated snorkel that directs the outside air to the diesel engine, and the exhaust gases generated are also discharged through the snorkel, and there is a line to prevent and remove the incoming seawater.

2. Nuclear power.

Nuclear power is another power developed after diesel-electric power. The principle of nuclear power is to drive a steam turbine to drive a propeller or generator to generate power through the high temperature generated by the nuclear reactor to produce steam in the steam engine.

The first to successfully install a nuclear reactor on a submarine was the USS Nautilus submarine of the US Navy, and there are five countries in the world that openly claim to have nuclear power, of which the United States and Russia have the highest proportion of use. The United States even announced in 1958 that it would no longer build non-nuclear-powered submarines.

Compared with traditional diesel-electric submarines, nuclear-powered submarines have the advantages of large power output, high power endurance (because the fuel replenishment and replacement of nuclear-powered submarines is usually more than 10 years, compared with diesel-electric submarines of only a few weeks or months, it is greatly increased, so it is usually regarded as unlimited endurance), fast speed and so on.

However, nuclear-powered submarines have the disadvantages of high technical difficulty, poor stability, high construction costs, high noise and high maintenance requirements. The advent of nuclear batteries solves these problems and means that submarines with superior performance can be manufactured in batches.

The Nautilus was built according to the Archimedes principle.

The Nautilus submarine is a slender spindle-type submarine with a length of 70 meters and a width of 8 meters, which is built according to the Archimedes principle and is powered by electricity. Excellent sailing performance, with a maximum speed of 50 knots.

This is an idealized submarine, the ship is driven by electricity supplied entirely by the carrier, and the electricity is extracted from the seawater of the liquid ridge, which is mixed with mercury to form an alloy used to replace the zinc element in the Bunsen battery cell, which is then converted into electricity and stored in the battery.

Scope of application of Archimedes' principle.

Archimedes' principle applies to objects that are fully or partially immersed in a stationary fluid, requiring that the lower surface of the object must be in contact with the fluid.

If the lower surface of the object is not fully in contact with the fluid, for example, a bridge pier that has been submerged in water, a shipwreck inserted into the seabed, a pile that has been driven into the bottom of a lake, etc., in this case, the force of the water is not equal to the force specified in the principle.

This principle also does not apply if there is a significant flow of water relative to the object (see Bernoulli's equation). The fish swims in the water, and the force calculated by Archimedes' principle is only a partial value due to the disturbance of the surrounding water. In these cases, the effects of hydrodynamics are taken into account.

The lifting force of the hydrofoil is much greater than the buoyancy force, which is a dynamic effect, and the law followed is different from that of statics.

The Nautilus submarine is 70 meters long and 8 meters wide at its widest point, and is spinning cone-shaped, built according to the Archimedes' principle and powered by electricity. Double-hull structure, well-proportioned hull structure, perfect connection technology, excellent sailing performance, maximum speed of up to 50 knots per hour. The most attractive part:

The front end of the submarine is the main battle ** angle of attack, which is extremely powerful, and there is no pressure to wreck a cruise ship.

Give a thumbs up for the simple diagram and introduction! (Language Assignment 1).

All-electric propulsion, all-electric system. The main battle ** is the angle of attack. It's not comparable to modern or even World War II submarines, but if it existed at the time, it was a bug

Exceptionally sturdy and cleverly constructed, it uses the ocean to provide resources.

The Nautilus, a submarine of 20,000 miles under the sea, is commonly known as the Nautilus.

Simply put, seawater is used to generate electricity.

Observe the world of Haidian through glass.

The original book describes: "The navigator was kept in a glass-enclosed cage with a protrusion in the upper part of the Nautilus's hull, and the return of the book was fitted with various concave and convex glass plates to ensure that he could see the course clearly. ”

Can the glass piece resist such strong pressure? , can resist. Although the glass cannot withstand impact and is brittle, it has a strong resistance to pressure.

In 1864, we learned that the glass sheet used at that time was only seven millimeters thick, which could resist the pressure of 16 atmospheres of leakage, and at the same time allowed strong heat to pass through, so that it could obtain an uneven distribution of heat. What's more, the thickness of the glass sheet we use is at least 21 centimeters, that is, it is 30 times thicker than the glass sheet used for fishing on it. ”