At present, the speed of ordinary train is about 100 km / h, while the design speed of Maglev express train is about 500 km / h, and the distance from Nanjing to Shanghai is 300 km. According to the above speed, the maglev train needs to travel from Nanjing to Shanghai______ h. It is shorter than the ordinary train from Nanjing to Shanghai______ h．

At present, the speed of ordinary train is about 100 km / h, while the design speed of Maglev express train is about 500 km / h, and the distance from Nanjing to Shanghai is 300 km. According to the above speed, the maglev train needs to travel from Nanjing to Shanghai______ h. It is shorter than the ordinary train from Nanjing to Shanghai______ h．

It is known that the speed of ordinary train is about 100 km / h, while the design speed of Maglev express train is about 500 km / h, and the distance from Nanjing to Shanghai is 300 km / h; According to the formula t = SV, we can get: ① the time of maglev train from Nanjing to Shanghai t = SV = 300500 = 0.6h; ② the time of ordinary train from Nanjing to Shanghai t = SV = 300100 = 3H; therefore, the maglev train is shortened by 3h-0.6h = 2.4h compared with ordinary train from Nanjing to Shanghai; therefore, the answer is: 0.6, 2.4

Speed of maglev train

As the fastest means of ground transportation at present, the maglev train technology has incomparable advantages over other ground transportation technologies: first, it overcomes the main obstacles of traditional wheel rail railway to improve the speed, and has broad prospects for development

Is the maglev train a maglev train

Although the famous old steam locomotive was called "Flying Scotsman", it never flew. Now, however, Japanese engineers are designing trains that can really fly, using the "wig" effect, that is, when flying objects approach the ground, they create a high-pressure air cushion underneath, Engineers believe they can design a maglev train that consumes only a quarter of its energy
When we drop a piece of paper, it will slide along the ground, which is the ground wing effect. Similarly, if the train is not subject to any friction except wind resistance, it can use little power to maintain forward momentum
An 8.1-meter-long research model named "air train" was used by the Institute of fluid science, Northeastern University of Japan. The model train has two pairs of front and rear wings, and the tail end of the wings has a vertical stabilizer rudder. The train is not equipped with an electric motor and needs to be driven by a truck to move along a semi closed track. In the recent experiment, after the train reaches a speed of 50 km / h, the speed of the front and rear wings is higher than that of the rear wings, Generate ground wing effect and lift successfully
Yasuaki Kohama, director of the research program, said: "there is also a ground wing effect between the vertical wing and the rail baffle, so the driving of the air train is completely automated."
Over the years, Russia has been leading in the field of ground effect spacecraft on the sea. Kohama studied their technology with Russian engineers. He said that the land-based system is more energy-efficient, "the closer to the surface, the higher the efficiency. There is a risk of being collided by waves at sea, so the best plane of ground effect cannot be used.", Land - based air trains can fly at an altitude of 5 - 10 cm
The next step, Kohama said, is to reduce the speed needed for an air train to rise and minimize the time it takes to make contact with the track. This will reduce friction and thus reduce energy consumption. The goal is to reduce carbon dioxide emissions to 3.6 grams per person per kilometer, compared with 12.2 grams for a maglev train
The maglev electric locomotive owned by the Japanese government needs the whole track to generate electromagnetism, which consumes a lot of energy. Kohama hopes that the air train can reduce energy consumption and gradually use renewable energy such as solar panels on the track baffle or wind turbines along the line to drive
Kohama's research team is currently preparing to build a practical model with three pairs of wings and two pairs of thrusters to achieve self driving speed of 150 km / h; after that, the team plans to build a train with six passengers and speed of 300 km / h; by 2020, it will build a train with 335 passengers and speed of 500 km / h

Why can maglev train run so fast?

Because the magnetic force of the track makes it suspended in the air, it does not need to contact the ground when walking, so its resistance is only the resistance of the air. The resistance is small, and the thrust (magnetic suction and repulsion) is large. Of course, it drives fast