How many kilometers does the earth travel around the sun per second

The earth's revolution speed the earth's revolution is a kind of periodic circular motion. Therefore, the earth's revolution speed includes angular velocity and linear velocity. If we use the stellar year as the earth's revolution cycle, then the average angular velocity of the earth's revolution is 360 ° per year, which is 360 ° after 365.2564 days

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1. The distance between the earth and the sun is about 1.5 × 10 ^ 8 km. Find the average speed of the earth around the sun (expressed by the scientific counting method in kilometer seconds, 1 365 days
2. The diameter of a certain kind of pollen is 36000nm, and how many meters is it expressed by scientific counting method
3. The diameter of a certain plant pollen is about 35000 nm, 1 nm = 10 ^ (- 9) M. the diameter of this kind of pollen is expressed by scientific counting method
4. The pollen diameter of chrysanthemum, peach and plum is about 50um, 30um and 20um respectively. Please use scientific counting method to show how many meters each of them is equivalent to?
5. It is known that the diameter of a certain pollen is 25 μ m, 1 μ M = 10-6 cubic meters. How many pollen can be arranged into 1 meter
6. How to express 1500 by scientific counting
7. Expressed by scientific counting 13651.5 billion yuan, in Yuan as a unit, expressed by scientific counting method, retaining four significant figures
8. Expressed by scientific counting method - 13500000
9. Expressed by scientific counting method: 20041003=
10. The diameter of a nanoparticle is 0.000 & nbsp; 000 & nbsp; 035m, which is expressed as ⊙ by scientific notation___ Rice
11. The following numbers are recorded by scientific counting method: (1) the earth is about 150 million kilometers away from the sun. (2) the reserves of coal on the earth are estimated to be more than 15 trillion tons Write down the following numbers by scientific counting method: (1) The earth is about 150 million kilometers away from the sun (2) The reserves of coal on earth are estimated to be more than 15 trillion tons (3) The mass of the moon is about 7 340 000 (4) The number of stars in the Milky way is about 160 million tons (5) The radius of the earth's orbit around the sun is about 149 000 km (6) There are about 25 million molecules in 1 cm of air
12. How many kilometers is the distance between the earth and the moon?
13. How many kilometers is the moon from the earth? Accurate to 0.0001
14. How many kilometers is the moon from the earth on average
15. How many kilometers is the distance between the moon and the earth?
16. What is the distance between the moon and the earth? The nearest distance
17. How many years does it take to go from the earth to the moon by ordinary plane
18. Flying around the earth and the moon! First of all, I'm a little Bai, so I asked the question, why does an aircraft (such as Tiangong, chang'e-3, etc.) have to fly around the earth for a long time before it can run to the moon when it is launched? When it is approaching the moon, it will fly around the moon for a long time before it can land, instead of flying vertically to the moon! Please tell me, and don't copy other people's answers, I've seen the answers given by others, but they are not specific enough! Rockets can't directly raise the aircraft to a certain speed, can they fly around the earth to a certain speed? Why do many people say that they save fuel? Why do they save fuel?
19. The distance from the moon to the earth's surface is about 384000000 meters, which is expressed as the distance in scientific notation (two significant numbers are reserved)______ Rice
20. On a map with a scale of 1:300000, the distance between a and B is 12 cm. On another map with a scale of 1:300000, the distance between a and B is 12 cm