Can water molecules maintain the physical properties of water when it evaporates?

Can water molecules maintain the physical properties of water when it evaporates?

The answer is B
1. A chemical substance in which a molecule can hold a substance. Its physical properties are determined by the substance itself
2. Volatilization is only the diffusion of molecules into the air, which is a physical change
3. Water molecules do not talk about physical properties
4. It's not water anymore, it's hydrogen and oxygen

Well, that's it~
Please explain the general formula of cattle grazing problem

Increment = (bull head × time - bull head × time) × time difference
Original quantity = (cow head - added quantity) × time
Bull head = original amount △ time + increase amount
Time = original quantity (bull head - increase quantity)
At the same time, it should be noted that the problem of cattle grazing is a special form of engineering problems. The key to keep the original grass quantity and grass growth rate constant is to determine two constant quantities
And the cattle grazing speed is set as "1"

In the (1-x * log2 (a)) ^ 10 expansion, if the coefficient of the fourth term is 15, then a =?

T4=3C10*1^7*log2(a)^3=120*log2(a)^3=15
So log2 (a) ^ 3 = 1 / 8
log2(a)=1/2
a=√2

More than 30, one sixth of it is (less than 36, three fourths of it is)（

More than 30, its one sixth number is (35) 30 × 1 / 6 + 30 = 35
Three quarters less than 36 is (27) 36 × (1-1 / 4) 27

The following formula holds: a * BC + D = 100; ab * cd-a * b * c * d = 1000
A / B / C / D are four different numbers

A=1
B=9
C=6
D=4
1×96+4=100
19×64-1×9×6×4=1216-216=1000

1024+212+256+… +2+1+1,2+1,4+1,8… +1,512,1+1024,1
Using a simple algorithm to calculate 1,2 is half (1,4,1,8 1512 11024)
It's urgent! Today,

Let s = 1024 + 512 + +2+12S=2048+1024+…… +4 + 2 so s = 2s-s = 2048-1 = 2047 let t = 1 / 2 + 1 / 4 + +1/512+1/10242T=1+1/2+…… +1 / 256 + 1 / 512t = 2t-t = 1-1 / 1024 = 1023 / 1024, so 1024 + 512 + +2+1+1/2+…… +1/1024=2047+1023/1024=2047...

One out of twelve twenties is equal to one out of ten

One twentieth of twelve is equal to one tenth of six

General division: 3A's Square, C's Square, B's Square, 2Ab's Square, C's Square, 5CB's Square, a's Square

b/3a²c²、 c/2ab 、a/5b²c
Their simplest common denominator is 30A & # 178; B & # 178; C & # 178;
b/3a²c²=10b³/30a²b²c²
c/2ab=15abc³/30a²b²c²
a/5b²c=6a³c/30a²b²c²

Given that the image of a first-order function passes through the point P [O. - 2] and is parallel to the straight line y = 3 / 4x, the analytic expression of the first-order function is obtained

The solution is parallel to the line y = 3 / 4x
So let the straight line be y = 3x / 4 + B
Then the straight line passes through the point P [O. - 2]
That is 3 / 4 × 0 + B = - 2
B = - 2
So the straight line is y = 3x / 4-2

The common quality factors of 42 and 66 are 42, the unique quality factors of 66 and the unique quality factors of 42

42=2*3*7
66=2*3*11
Therefore, the common quality factors of 42 and 66 are 2 and 3
The unique quality factor of 42 is 7
The unique quality factor of 66 is 11