Theoretical formula of molecular dynamics Chapter 1 objects are made up of a large number of molecules. There are some related chemical quantities in the problem Such as average molar mass, molar volume What is the relationship between these quantities? Is the formula ~ is probably the high school chemistry knowledge, but the high school one study is not good

Theoretical formula of molecular dynamics Chapter 1 objects are made up of a large number of molecules. There are some related chemical quantities in the problem Such as average molar mass, molar volume What is the relationship between these quantities? Is the formula ~ is probably the high school chemistry knowledge, but the high school one study is not good

Average molar mass = molar volume × density

Who can sum up some physics formulas for me? In the theory of molecular motion, the object is composed of a large number of molecules
I don't see a formula in the book

It can be concluded that f = FN, FF = g (3) A. when F1 is removed, the wood block is still in equilibrium, so the resultant force on the wood block is 0. [example 2] the weight of the hydrogen balloon is 10 N, and the buoyancy of the air on it is 16 n. when it is tied with a rope, the rope is at an angle of 30 ° with the vertical direction due to the horizontal wind force, the tensile force of the rope is 0_ ...

It is known that sin α - cos α = 1 / 2 and π

The answer you want is: sin α = 2Sin (α / 2) cos (α / 2), cos α = 2cos (α / 2) - 1, sin (α / 2) + cos (α / 2) = 1, so sin α - cos α = 2Sin (α / 2) cos (α / 2) - [2cos (α / 2) - 1] = 2cos (α / 2) [sin (α / 2) - cos (α / 2)] = 1 / 2

1. Classify the following Chinese characters according to their structures
In the field, there is a crystal saddle, the sun is shining, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying, the sun is flying
Single character structure: left and right structure: upper and lower structure: left middle and right structure: upper, middle and lower structure: semi surrounded structure: full surrounded structure: Pinzi structure:
The correct group of the following pictophonetic words according to the classification of pictophonetic sound is: []
1. Riding 2. Boring 3. Managing 4. Howing 5. Stool 6. Father 7. Female 8. Orifice 9. Garden 10. Partial 11. Kindness 12. Morning
A.1 3 7 10 B.2 4 6 9 C.3 6 8 12 D.5 9 11 12
Judgment questions
1. All syllables are composed of initials, finals and tones
2. When you pass five words with dots, you should read them softly
.....
3. Every word of China, Lei Feng, Liu Hulan and people's daily should be capitalized
4. The meaning of "leaning" in "listening" is: slanting, slanting
In addition to the radicals, Lu checked seven paintings
6. According to the method of radical search, "you" refers to the radical "Dan"

1. Classify the following Chinese characters according to their structures: Tianshang Rimi structure: anshuo structure: Jiasi Yingen structure: left middle right structure: Tianshang Rimi structure: anshuo structure: Jiasi Yingen structure: Sisuo structure

Let n belong to N, n > 1, and prove logn (n + 1) > logn + 1 (n + 2)

The formula loga (b) = logn (b) / logn (a) logn (n + 1) = LG (n + 1) / lgnlogn + 1 (n + 2) = LG (n + 2) / LG (n + 1) logn (n + 1) - logn + 1 (n + 2) = {LG (n + 1) ^ 2-lg (n ^ 2 + 2n)} / lgnlg (n + 1) because n > 1, lgnlg (n + 1) > 0

How to solve the equation a + B + C = - 6 C = - 4 4a-2b + C = 6

a+b+c=-6
c=-4
4a-2b+c=6
Simplification
a+b=-2(1)
2a-b=5(2)
(1)+(2)
3a=3
a=1
b=-3
So a = 1, B = - 3, C = - 4

Calculating primary school mathematics skillfully
1. The rope is 8 meters long. Cut off 1 / 3 of the rope in the first time and the remaining 1 / 3 in the second time. How many meters are left after cutting off 8 times in turn?
2. If a club gives its members tickets, each member can get 92 tickets per capita. Actually, each female member gets 84 tickets and each male member gets 96 tickets?

1. Subtracting 1 / 3 each time, the rest is 2 / 3, so 8 * 2 / 3 * 2 / 3 * 2 / 3 * 2 / 3 * 2 / 3 * 2 / 3 * 2 / 3 * 2 / 3 can also use the power of 8 times 2 / 3, but the primary school students have not learned this. We still use the previous algorithm, and get 2048 / 6561, about 0.31 m2

Is the letter combination ie pronounced / E / or the letter I silent in friend?

friend [frend]
The letter I is not pronounced

In the △ PMN of area 1, tanpmn = 1 / 2, tanmnp = 2, establish an appropriate coordinate system, and solve the elliptic equation with m, n as the focus and P as the point

Let m (- C, 0), n (C, 0) (c > 0). Since MQ = 2pq = 4nq, q (0.6c, 0), P (0.6c, 0.8C) can be obtained. Let the elliptic equation be x2 / A2 + Y2 / (a2-c)

17/50=X%

17/50=x%
17/50=34/100=x/100
So x = 34