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I'm going to buy a piece of wood, 5cm thick, 13cm wide and 4m long. How much is the cube?
0.026 M3
·I have a piece of wood 150 cm in length, 9 cm in width and 6 cm in height. How should I calculate its cubic number,
The cube is the unit to the third power
150cm*9cm*6cm=8100cm^3
Cube = length * width * height
2 meters long wood, 12 cm in diameter. How many pieces do you need to have one side? Please 3Q
Get angry in a hurry
The volume of each round wood is 0.022608 cubic meters, so the volume of one square wood is 44.2321. If the volume of each square wood is 0.0288 cubic meters, the volume of one square wood is 34.7
Simple operation of 99.9 + 99.9?
To calculate
99.9+99.9
=(100-0.1)+(100-0.1)
=200-0.2
=199.8
Dy / dx-y = x satisfies the special solution of Y (0)
dy/dx-y=x
The homogeneous solution is y = CE ^ X
The special solution is y = - X-1
So the general solution is y = CE ^ x-x-1
y(0)=?
1: 1. What is the empirical value of cement slurry density (ordinary 42.5 cement)
This seems to need field test to know, but I just calculated the ratio roughly. Who can provide the algorithm or empirical value
Generally, it is in the range of 1.50 ~ 1.53. I use po.42.5 cement here, and the density is 1.51 when the water cement ratio is 1:1
Given that the sequence {an} satisfies A1 = 1An = 2An − 1 + 1, n ≥ 2, find the general term formula of {an} and its first n terms and Sn
∵ when n ≥ 2, an = 2an-1 + 1, ∵ an + 1 = 2 (an-1 + 1) an + 1An − 1 + 1 = 2, ∵ sequence {an + 1} is equal ratio sequence, and the common ratio is 2, and ∵ A1 = 1, ∵ a1 + 1 = 2 ∵ an + 1 = 2n, an = 2n-1sn = 21-1 + 22-1 + +2n-1=2(1−2n)1−2-n=2n+1-2-n
If the function f (x) = (2a-1) ^ x is a decreasing function on R, then the value range of a is
F (x) = (2a-1) ^ x is a decreasing function on R
So there are: 0
How to calculate 9.87 * 7.2-0.987 simply
9.87*7.2-0.987
0.987x7.2x10-0.987
=0.987x（72-1）
=0.987x（70+1）
=0.987x70+0.987
=69.09+0.987
=70.077
Cut a cylinder whose bottom diameter is 6cm and height is 10cm into two half cylinders along the bottom diameter. Find the sum of the surface area of one half cylinder (as shown in the figure)
Product
The circumference of the bottom surface of the cylinder is 3.14 * 6 = 18.84 (CM), the side area of the cylinder is 18.84 * 10 = 188.4 (cm ~ 2), the side area of the half cylinder is 188.4/2 + 6 * 10 = 154.2 (cm ~ 2), and the sum of the upper and lower bottom areas of the half cylinder is 3.14 * (6 / 2) ^ 2 = 28.26 (cm ~ 2)
RELATED INFORMATIONS
- 1. Cylindrical wood, 150 cm long, cross-section diameter is 12 cm, if according to the ratio of 2:3 according to it into two sections, then the shorter section volume is how many cubic centimeters?
- 2. The volume of a cuboid wood is 216 cubic decimeters, the cross section area is 24 square decimeters, and the length of this wood is () decimeters
- 3. A 2-meter-long cuboid wood has a cross-sectional area of 16 square decimeters. How many cubic meters is its volume? Determinant
- 4. Saw the 1.2 meter long cuboid wood into three sections, the surface area increased by 48 square decimeters, the original volume of the wood is______ ．
- 5. A square table is made of a table top and four legs. It is known that one cubic meter of wood can be used to make 50 tables or 300 legs. Now five cubic meters of wood, what should we do Cutting material, can make the table top and table leg just match?
- 6. A square table consists of a table top and four legs. It is known that one cubic meter of wood can be used for 50 tables or 300 legs (equations only) A square table consists of a table top and four legs. It is known that one cubic meter of wood can make 50 tables or 300 legs. Please help the carpenter to calculate how many square tables can be made with five cubic meters of wood The equation can be set up linear equation in two unknowns
- 7. Now you need to buy 1 cubic meter of wood. For example, 4 meters long, 0.08 meters wide, 0.05 meters high is less than 3 cubic meters For example, 4 meters long, 0.08 meters wide, 0.05 meters high is equal to less cubic? If you have, please teach me more carefully! Teach me how to calculate! Now I need it very much!
- 8. I want a unit of length under millimeter To be less than millimeter, there must be a progressive rate, for example: kilometer × 100 = meter × 10 = decimeter × 10 = centimeter
- 9. Find the physical order of magnitude The form of a few cubic meters of 10 tells me: the size of the electron cloud, asteroid belt stars (sun) planets The form of a few power seconds of 10 tells me: the time of a pulse, a day, a year, the life span of a person, the age of the earth, the age of the galaxy All of the above know that you can tell me 10 times
- 10. What is the rate of progress between kilometers and meters, and between meters and decimeters?
- 11. It's 10 centimeters in diameter and 8 meters long
- 12. The diameter of a tree is 12cm, the height is 10m ~ how many cubic meters of wood can it produce~
- 13. A cuboid wood is 5.2 meters long. If it is sawn 10 cm short, its volume will be reduced by 1000 cubic centimeters. What is the original volume of this wood?
- 14. The surface area increases by 4 square meters after two cylinders are cut into 10 cm on one cylinder?
- 15. The length of a cylindrical wood is 4dm, and the bottom radius is 10cm. After cutting it into three sections, the surface area increases by () cm2? A.942 b.1256 c.1884
- 16. A cuboid wood is 3 meters long. Now, after sawing the wood into 4 sections, the surface area increases by 48 square decimeters. The volume of the cuboid wood is 3 meters______ Cubic decimeter
- 17. A section of cuboid wood is one meter long. If it is sawn two centimeters short, its volume will be reduced by 20 cubic centimeters. What is the original volume of this section of wood?
- 18. After sawing a 2-meter-long cuboid into two sections, its surface area increases by 100 square centimeters, and its volume is () A.100 cubic centimeters After sawing a 2-meter-long cuboid into two sections, its surface area increases by 100 square centimeters, and its volume is () A. 100 cc b.200 CC C. 10000 cm3 D.2 DM3
- 19. How can a 2m long wood with a diameter of 20cm be counted as a cube? For example, the cubic formula of wood processing plant: Diameter 10cm = 0.019, how did this 0.019 come from? Diameter 12cm = 0.027? Diameter 14cm = 0.036? Diameter: 16cm = 0.047? Diameter 18cm = 0.059? Diameter 20cm = 0.072? Diameter 22cm = 0.086? Diameter 24cm = 0.102? Diameter 26cm = 0.12? All the above are two meters in length. What's the reason for his formula? If it's three meters or 3.5 meters in length, how should it be calculated?
- 20. A cylindrical timber with a radius of 20cm. After sawing it into three equal small cylinders, how many square centimeters has the surface area increased