How to convert nmol / L to ng / ml

1mol = molecular weight g
L=1000ml
For example, the concentration of CaCO3 is 0.1mol/l = 0.1 * 100g / 1000 = 1 / 100g / ml

What's the difference between kg and kgs?

Kg is a kilogram, odd
Kgs is kilogram, plural form
Let's see if the numbers are single or multiple

A small ball with a mass of 0.1kg is suspended at the top of the inclined plane with an inclination angle of 37 ° by a thin line. When the system is stationary, the thin line is parallel to the inclined plane, regardless of all friction
What is the tension on the rope under the following conditions?
1: The system accelerates to the left with the acceleration of 5m and S2
2: The system accelerates to the right with the acceleration of 10m and S2
3: The system accelerates to the right with the acceleration of 15m and S2, and the inclined plane moves to the left

0N1.25N1.5N

It is known that the side length of a square is 3. When the side length increases x, the area increases y. then the analytic expression of Y with respect to X is?
Such as the title

y+9=(x+3)^2
It is reduced to y = x ^ 2 + 6x

The shell mass of the spring scale is M0, the mass of the spring and the hook is ignored, and a heavy object m is hoisted on the hook. Now, a vertical external force F is used to pull the spring scale. When the spring scale moves upward with uniform acceleration, the indication of the spring scale is (the acceleration of gravity is g, excluding the air resistance)
The reading of the spring dynamometer actually shows the tension of the spring hook. Suppose that the acceleration of the spring dynamometer is a, then the reading
F1=Mg+Ma
It's not supposed to be f = ma = FRA + Mg + Mo = ma. Why FRA = Mg + ma
Why didn't the final result come out

It's true that FRA + Mg + Mo = ma, but it's in vector form, that is to say, FRA and Mg are in opposite directions

1. A 19.6cm high Qin Dynasty general figurine is on display in the museum. The ratio of its height to the actual height is 1:10. What is the actual height of the general Figurine? (write the formula, Division)
2. Xiaoqiang walked 180 meters in three minutes, and Xiaogang walked 3.6 kilometers. Xiaoqiang said that the specific energy of their respective distance and time constitutes a proportion. Xiaogang said that they can't form a proportion. Who is right? (write the formula, Division)
3. All items of a proportional formula are certificates. The ratio of its two ratios is 0.8, and the first term is 3 times smaller than the second term, and the third term is 2 times of the first term. Write this proportional formula
The third correct question is:
All items of a proportional expression are integers. The ratio of its two ratios is 0. The first term is 3 times smaller than the second term, and the third term is twice as large as the first term. Write the ratio.

1. General's actual height: 19.6x10 = 196cm
2. The distance and time ratio of Xiaoqiang: 180 / 3 = 60 m / min;
The distance and time ratio of Xiaogang: 3600 / 3 = 1200 m / min;
Then, the ratio of distance and time taken by Xiaoqiang and Xiaogang: 60:1200 = 1:20
Xiaoqiang is right
Let the first term be X
x：（x+3）=0.8
0.2x=2.4
x=12
x+3=15
2x=24
2（x+3）=30
Then: the proportion formula is 12:15 = 24:30

As shown in the figure, the object G = 500N, under the action of tensile force F, the object moves at a constant speed of 2m, and the speed of motion is 0.2m/s. If the work done by tensile force is 600J, and the mechanical efficiency of pulley block is 80%, find: (1) what is the power of tensile force F? (2) What is the friction force on an object?

(1) The motion time of the object t = SV = 2m0.2m/s = 10s; ptotal = wtotal t = 600j10s = 60W; answer: the power of pulling force F is 60W. (2) ∵ wtotal = η wtotal = 80% × 600J = 480j ∵ f = wtotal = 480j2m = 240n. Answer: the friction force of the object is 240n

In the arithmetic sequence an, the sum of the first n terms is Sn, A3 = 12, S12 > 0, S13 < 0
1. Calculate the value range of tolerance
2.S1,S2… Which value of S12 is the largest, and explain the reason

Solution,
1）,S12=12(a1+a12)/2>0
So a1 + A12 = A3 + A10 = 2A3 + 7d > 0
S13=13(a1+a13)/2=13a7

The elevator at the bottom of the mine starts to make uniform acceleration linear motion from static state, and reaches 4m / s after 5S, then rises for 20s at this speed, and then makes uniform deceleration motion, and stops at the wellhead just after 4S, so as to calculate the depth of the mine

Let the displacement of uniform acceleration motion be x1, the displacement of uniform velocity motion be X2, and the displacement of uniform deceleration motion be X3

Xiao Ming and Xiao Gang stipulate a new operation : if a and B are rational numbers, then a b = 3a-2b. Xiao Ming calculates 2 * 5 = 3 × 2-2 × 5 = - 4, please help Xiao Gang calculate 2 * (- 5)=______ ．

According to the new definition in the question: 2 * (- 5) = 3 × 2-2 × (- 5) = 6 + 10 = 16

How to convert nmol / L to ng / ml