How to measure the diameter of a hair
The hair diameter of normal people is between 0.09mm and 0.06mm
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- 1. How to measure the diameter of a hair
- 2. What are the other units between millimeter and micron
- 3. What's the reciprocal of minus one and five out of seven
- 4. Nanotechnology is a new technology. It is a unit of length. One nanometer is equal to one billionth of a meter. Expressed by scientific notation: one meter=______ Nanometer
- 5. Nanometer is a unit of length, which is used to represent the length of a tiny particle. One nanometer is one billionth of a meter, and 10 ^ - 9 meters, which is equivalent to one 60000 of the diameter of a hair. It is known that the length of a certain micro particle is 80 nm. Please use decimal to indicate the length of the particle?
- 6. If the sum of the square y of the monomial MX and the-n-1 power y of NX is zero, we can find the value of M fast
- 7. The volume of the earth is 9.05x10 cubic kilometers, the radius of the sun is the second power of the earth's 10, the volume of the sun!
- 8. It is known that the radius of the ball is RCM and the volume of the ball is 850cm3. According to the formula of the volume of the ball, V ball = 43 π R3, the value of R (accurate to 0.01) can be obtained
- 9. The earth can be approximately a sphere with a radius of 6.37 * 10 to the third power (km). What is the volume of the earth The earth can be approximately regarded as a sphere with a radius of 6.37 * 10 cubic kilometers. What is the volume of the earth
- 10. The radius of the earth = 6.4 * 10 cubic km, the volume of the earth, π = 3, v = 4 / 3 π r cube
- 11. How many meters is 12 nanometers?
- 12. 200 ml = () cm to the third power
- 13. What is the minus 8 power of 10?
- 14. 1. The power of 2011 of (- 8) times the power of 2010 of 0.125 is equal to? 2; If a is equal to the sixth power of - 8a and the ninth power of B, then a is equal to? 3. The fourth power of (- 3a to the fifth power) + the square of (2a to the fourth power) multiplied by the square of (a to the square) is equal to? 4. If the cube of (M minus 1 power of 2x, m plus 2n power of Y) is equal to the 12th power of 8x, and the 9th power of Y, then M equals? N equals? N?
- 15. The square of 3x to the fourth power of 2x to the fourth power of 7x-3 is the expression of () degree (), in which the coefficient of the highest degree term is (), and the constant term is ()
- 16. Odd times even equals? Why
- 17. Odd number plus odd number equals even number, why even number plus even number does not equal odd number?
- 18. How many constant terms does a binomial have
- 19. On binomial constant term In binomial expansion calculation, why do some make n minus r equal to 0, some make n minus r equal to other numbers? I don't know why. According to which judgment
- 20. What is the difference between binomial coefficient and binomial constant term