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9. Macro objects are made up of a large number of molecules, which are about the order of magnitude in diameter_____ m.
The diameter of the molecule is about one to one hundred meters. One meter is equal to the negative tenth power of ten
What is the order of magnitude of the diameter of an atom?
10 ＾ · 10 meters, the amount is 10 minus 10 square meters
The speed of the earth's revolution around the sun is about 1.1 * 1000000km / h, and the speed of sound propagation in the air is about 330m / s
Help me to make it clear, please I know the speed of the earth's revolution around the sun is fast, and I've written it myself, but I'm afraid I'll make a mistake
1.1X10^5km/h=1.1X10^5X1000m/3600s=3.05X10^4m/s>330m/s
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