There is a poem "Walking on the floor for 80,000 Ali days". Please use your knowledge of the earth to talk about the scientific truth contained in the poem. (It is better to have data. )

The diameter of the earth is about 12500 km. If you multiply it by pi 3. 14 16, you will get about 40,000 kilometers, or 80,000 miles. This is the mileage of the earth's rotation (that is, one day).

A test of sitting on the ground and walking 80 thousand miles a day

1958 On July 3rd, Chairman Mao published two poems in People's Daily:

one

Green water and green mountains are vain,

Hua tuo had no choice but to eavesdrop on him!

Qiancun Ficus pumila heritage,

Everyone sings.

Sitting on the ground and walking 80 thousand miles a day,

Looking at thousands of rivers.

Cowherd wants to ask about the plague,

The same sadness and joy are gone.

Secondly,

The spring breeze is covered with willows,

600 million China is as smooth as Yao.

Red rain turns into waves at will,

Qingshan deliberately turned into a bridge.

Tianlian Wuling silver hoe fell,

The earth shook three rivers with its iron arm.

Excuse me, where does Wen Jun want to go?

Paper boats burn like candles.

Jiang Zhuru (Mao's classmate in Hunan No.1 Normal University) questioned Mao's "starting from the ground and traveling 80,000 miles a day", but Mao ignored it. Instead, I wrote a letter to Zhou Shizhao on August 25th, 1958: "Starting from the ground, traveling 80,000 miles a day, Jiang Zhuru was wrong, and there are data. The diameter of the earth is about 12500 km. If you multiply it by pi 3. 14 16, you will get about 40,000 kilometers, or 80,000 miles. This is the mileage of the earth's rotation (that is, one day). By train, ship and bus, there is a price to pay. This is called traveling. Sitting on the earth, without paying the price (that is, without buying a ticket), I walked 80 thousand miles a day and asked people if this was a trip. The answer is no, I didn't move. This is outrageous! Limited by customs, superstition has not been eliminated. A complete daily life is strange to many people. Sky survey means that our solar system (including the earth) passes through the Milky Way every day and hour. The Milky Way is a river, and the river is infinite. "One thousand" is just a lot of words. We humans just' cruise' in a river, but we can see countless things. Cowherd and Jin people, schistosomiasis and mire disease, commonly known as bilge disease, were frequently reported in Zhou, Qin and Han Dynasties. Cowherd naturally cares about fellow villagers and asks about the situation of athel Loren. Ursa major, commonly known as Altair (is it wrong? ), belonging to the Milky Way. "

Mao is really a great man! "Meter" is a unit of length. The earliest definition of "meter" originated in France. 1790 In May, a special committee composed of French scientists suggested that one fortieth of the total length of the meridian of the earth passing through Paris (that is, the circumference of the earth passing through Paris and the north and south poles) be used as the unit of length, and 179 1 year was approved by the French Parliament. 40 million meters is 40 thousand kilometers, which is 80 thousand Li as Mao said.