What is the diameter of a hair?

What is the diameter of a hair?

The diameter of a hair is about 0.06 mm = (60 μ m) = 60000 nm = 6 * 10 ^ 4 nm
Note: 1 nm is equivalent to one 60000th of the diameter of a hair

To input a batch of the latest industrial information into the management and storage network, it takes 6 hours for Party A to do it alone, 4 hours for Party B to do it alone, 30 minutes for Party A to do it first, and then Party A and Party B to do it together. How many hours will it take for Party A and Party B to complete the work together?

According to the meaning of the question, we get 16 × 12 + (16 + 14) x = 1. To solve this equation, we get x = 115, 115 hours = 2 hours and 12 minutes. A: we need 2 hours and 12 minutes to finish the work

Observe the number of columns: 0, - 3, - 8, - 15, - 24 What's the tenth number

0=1²-1
3=2²-1
8=3²-1
15=4²-1
24=5²-1
therefore
an=-(n²-1)=1-n²
a10=1-100=-99
Hope to help you

2 + 2 / 3 = 2 square × 2 / 3, 3 + 3 / 8 = 3 square × 3 / 8, 4 + 15 / 4, if: 9 + B / a = 9 square * B / A, then a + B = ()

2 + 3 / 2 = the square of 2 × 3 / 2,
3 + 8 / 3 = the square of 3 × 8 / 3,
4 + 4 / 15,
If: 9 + B a = 9 square * B a, then a + B = (801 / 80)
b=9;a=81/80;a+b=801/80;
If you don't understand this question, you can ask,

What are the knowledge points in the first volume of junior high school physics?

Who can give 20 questions in every chapter of physics in grade 2 of PEP edition? Add the answers: pressure and buoyancy, man is force and machinery. These are the knowledge points of grade 3. There are a lot of typical questions on the Internet

There are 5 red balls, 10 yellow balls and 15 white balls with the same shape and size in a bag. If the possibility of touching red balls and yellow balls is one fourth each, you can take () yellow balls and () white balls out of your pocket; you can also put () red balls in your pocket; () white balls and ()

There are 5 red balls, 10 yellow balls and 15 white balls with the same shape and size in a bag. If the possibility of touching the red ball and the yellow ball is one fourth each, you can take out (5) yellow balls and (5) white balls from your pocket; you can also put (5) red balls in your pocket; (5) white balls, you can also take out (6) yellow balls and (7) white balls and (1) red balls from your pocket

How many square meters is one mu

1 mu = 666.667 square meters

Xiao Ming's story books are seven times as many as Xiao Hong's. they buy the same number of story books. At this time, Xiao Ming's story books are six times as many as Xiao Hong's. They also buy the same number of story books. At this time, Xiao Ming's story books are five times as many as Xiao Hong's. So, how many story books did Xiao Ming and Xiao Hong have at least? Write the detailed process (I only know the answer is 80)

Obviously, the difference in the number of their story books remained constant throughout the process
The difference is divisible by 6 (7-1); 5 (6-1); 4 (5-1)
The least common multiple [4,5,6] is the minimum value of 60
In this case, the answer is: 60 ÷ (7-1) × (7 + 1) = 80 [units per unit × copies = total amount]

The ratio of five sixths to five eighteenth is () a.1 ∶ 3 B.3 ∶ 1 C.2 quarter

The ratio of 5 / 6 to 5 / 18 is b.3:1

Prepare 1000 ml of 10% sodium hydroxide with a density of 1.1}. How many grams of water are needed

m=1000*1.1=1100g
Because the mass fraction of NaOH is 10%
So m (NaOH) = 110g
m(H2O)=1100*90%=990g