Is this the most round sphere in the world? Countless scientists have been built for five years, what is the use?2018-09-10 20:25:35 211 ℃
The world is so big, the little coffee takes you to see. Hello everyone, welcome to travel.
Does 1 kilogram have multiple? In many people's impressions, there has never been a clear concept. People just know that kilograms can be measured by scales. The kilogram original, also known as a kilogram of standard, is the weight of a kilogram unit standard, which is made of 90% platinum and 10% bismuth. Over time, the original kilogram has existed for more than 100 years, and its surface has also changed by 50 micrograms due to pollution.
There is such a different sphere, known as the world's most round sphere, due to the mass deviation of the original instrument will bring very serious As a result, the meaning of this sphere exists to represent the standard of one kilogram of mass unit.
According to relevant data, the sphere is about 93.75 mm in diameter and made of silicon 28, which is the world's highest purity silicon, with a total of 2.15 times. Take 10 to 25 cubic silicon atoms.
Although this sphere looks ordinary, its manufacturing process is very difficult. The sphere has been built for five years, and countless scientists are involved, costing tens of millions. First, in order to obtain high-purity silicon, scientists used a centrifuge, then shipped the silicon to Germany, and made a number of experiments to make a sphere. At the end of the day, the ball was transported across the sea to Australia. After repeated tempering by the world's top engineers and machines, it eventually became the world's most round sphere.
The most sophisticated equipment and countless scientists spent five years to build huge amounts of money, making this sphere an invaluable treasure, and it has a very big meaning and role.
How about the little friends, what do you want to say about the world's most round sphere?
This trip will be here, we will see you next time.
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