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The diameter of human hair is about 7 * 10 ^ - 5 meters. How many nanometers is the diameter of human hair
70000 nm, 10-9m at 1nm
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- 1. The diameter of a hair is only about 7 × 10 negative quadratic mm, how many nm
- 2. 0.05um equals () nm equals () m equals () km
- 3. At present, the chip line width of the most advanced microelectronic devices in the world has been reduced to 0.13um. In a few years, it may be reduced to 0.05um, 0.05um=___ nm=___ m=__ km
- 4. How much is 0.05 μ m? How much is nm?
- 5. 0.05m=( )cm,5mm=( )m,0.7μm=（ ）nm,100cm=( )μm,30nm=( )km,2km=( )mm The answers should be expressed by scientific counting
- 6. 76x10, KM = M = DM = um = nm
- 7. (1)75μm= = m (2)15cm= = km (3)240dm= = km (4)0.36mm= = nm
- 8. 1、10³km=______ mm=_____ Micron 2, 180dm=_____ m=_______ nm 3、2,7x10³nm_____ km=____ dm 4、485m=______ mm=______ km
- 9. In the international system of units, the unit of length is___ , the symbol is__ What is the time unit___ The symbol is___ 50 nm___ m
- 10. In the international system of units (SI), the basic unit of length is:______ The symbol is:______ In addition, some other units are specified: kilometer (km), decimeter (DM), centimeter (CM), millimeter (mm), micron (μ m), nanometer (nm), etc
- 11. When can man fly out of the solar system? When can man fly out of the galaxy? Is the world beyond the earth wonderful
- 12. It is known that the speed of light is 300000 kg / s. after one year, light has walked____________ Km. Light is known to be emitted from one side of the galaxy, It is known that the speed of light is 300000 kg / s. after one year, light has walked____________ It is known that light is emitted from one side of the Milky way, and the time when light reaches the opposite side is 70000a, then the diameter of the Milky way is about___________ km.
- 13. The diameter of the Milky way is about (), and the distance between the sun and the center of the Milky way is about ()
- 14. The diameter of the Milky way is about 100000 light years. How many meters is the diameter of the Milky way
- 15. The diameter of the Milky way is about a, 60000 light-years B, 80000 light-years C, 100000 light-years D and 120000 light-years
- 16. 1. The Milky way is composed of about () billion to () billion stars, with a diameter of () million light years
- 17. The Milky way is 70000 light-years in diameter. How many years does it take to fly at 800 kilometers per hour
- 18. The diameter of the Milky way reaches 100000 light-years, about how many kilometers?
- 19. What is the 12th power nm of 3.6 * 10 equal to m
- 20. I think it's very difficult to convert the physical length unit into scientific counting method. What method can be simpler