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A 150 cubic centimeter iron block is completely immersed in a cylindrical container containing water. The diameter of its bottom is 10 cm. How much has the water surface risen People's education sixth grade matching exercise book page 12
Water level rise = 150 ÷ (5 * 5 * 3.14) ≈ 1.91cm
The diameter of the bottom surface of a cylindrical glass container is 8 cm. Take a piece of iron from the water of the container, and the water drops by 3 cm. What's the volume of this piece of iron
kuai
V = π R ^ 2 * H = 3.14 * 4 ^ 2 * 3 = 150.72 CC
The edge of a cube container is 2 decimeters long. The container contains water. When a stone sinks into the water, the water in the container rises by 2 cm. What is the volume of the stone
Cubic centimeter?
Less cubic centimeter?
2 decimeters = 20 cm
The volume of stone is 20 × 20 × 2 = 800 cubic centimeters
How many microamperes is 0.6 a? How many microamperes is 70 ma? How many microamperes is 750 ma?
0.6A=600mA
70 Ma = 70000 micro a = 0.07 a
750 μ a = 0.75 Ma = 0.00075 a
Which one of balance or spring dynamometer can't be used in space
Balance
Because the balance is an equal arm lever, it uses the lever balance condition, and the pressure of the object on the tray is equal to the pressure of the weight on the tray,
Objects in space are completely weightless and will not exert corresponding pressure on the tray
The spring dynamometer can measure the pulling force, but it can't measure the force related to gravity
If the sum of length and width of a cuboid is 14cm, the sum of width and height is 11cm, and the sum of length and height is 13cm, its surface area is? Cm square,
What about the volume?
Length + width = 14cm,
Width + height = 11cm,
Length + height = 13cm,
Length = 8cm width = 6cm height = 5cm
So the surface area is s = 2 (8 * 6 + 8 * 5 + 6 * 5) = 2 (48 + 40 + 30) = 2 * 118 = 236 square centimeters
The volume is 8 * 6 * 5 = 240 cubic centimeters
As shown in the figure, one end of a spring is fixed on the ceiling, and the other end of B spring is fixed on the horizontal ground. When a weight g is hung on the other end of a and a weight g is pressed on the other end of B, the length of the two springs is L. now the two springs are connected in parallel and a weight g is tied under them. At this time, the length of the spring should be ()
A. L+G2kB. L+GkC. L-G2kD. L-Gk
(1) Let the stiffness coefficient of the spring be K. according to the expression of the spring length, if the length of the spring is L = l0 + x = l0 + FK, then the length of the first spring is L = l0 + GK, then the original length is l0 = l-gk; if the length of the second spring is L = l0 GK, then the original length is l0 = L + GK; (2) if the length of the first spring and the second spring are set to be s, then the elongation of the first spring is X1 = s - (l-gk), and the tensile force is kx1 = k [S - (l-gk)]; the elongation of the second spring is X 2 = s - (L + GK), producing tension kx2 = k [S - (L + GK)]; the sum of the tension of a and B springs should be equal to g, that is, K [S - (l-gk)] + K [S - (L + GK)] = g. the length of spring s = L + g2k is obtained by solving the equation
Give you four natural numbers 3,5,4,7. Through four operations, you can exchange the position of numbers and add operation symbols at will, but each number can only be used once. Write a comprehensive formula, and the result is equal to 24
Four times five plus seven minus three
Under the action of pulling force F, an object with mass m moves uniformly along the horizontal plane to the right?
The object with mass m moves uniformly along the horizontal direction to the right under the action of tension F, so the force is balanced
Friction f = tension f
f=uMg
So UMG = F
u=F/Mg
The dynamic friction factor between M and horizontal plane is f / mg
Let Sn be the sum of the first n terms of the arithmetic sequence an, if S3 / S7 = 1 / 3, then S6 / S7=
S3/S7=1/3
3﹙3a1＋3q﹚=7a1＋21q
a1=6q
S6/S7=﹙6a1＋15q﹚／﹙7a1＋21q﹚=51/63=17/21
RELATED INFORMATIONS
- 1. A cylindrical container with a bottom radius of 5cm is filled with water. Immerse a 157 cubic centimeter iron block in water. When the iron block is taken out, how many centimeters does the water surface drop?
- 2. If a 150 cubic centimeter iron block is completely immersed in a cylindrical container with water, and the bottom diameter of the cylindrical container is 10 cm, then Process to calculate What's the height of the rise of the water? (the number obtained keeps the whole number)
- 3. The cube container with the edge length of 6 decimeters is filled with water. Pour all the water in the container into a cuboid water tank. The water tank measures 6 decimeters long, 5 decimeters wide and 8.5 decimeters high from inside. At this time, what is the depth of water poured into the water tank? How many liters of water should I fill the tank?
- 4. (unit: cm) there is 1 long 15 wide 10 cuboid container with water. Put 4 eggs in it. The water rises by 2. There is a formula for calculating the volume of eggs. Thank you
- 5. The volume of an egg is measured with a cylindrical glass container and a conical glass container. It is known that there is the same amount of water in the two containers, and the area of the bottom of the cylinder The bottom radius of the cone container is 10 cm and the height is 20 cm. The water in the cone glass container is 12 cm high. Put the egg in the cone container and immerse it completely. The water level rises by 6 cm. Then put the egg in the cylinder container and immerse it completely. How many cm does the water rise?
- 6. The diameter of the bottom surface of a cylindrical container is 10 cm. After putting a piece of iron into the container, the water surface rises by 2 cm. The volume of this piece of iron is () cubic cm A. 157B. 628C. 125.6D. 78.5
- 7. A cuboid container with a bottom area of 15 square decimeters contains 3 decimeters of water. After an irregular stone is put into the container (the stone is completely immersed in the water, and the water surface rises by 2 cm). How many cubic decimeters is the volume of the stone?
- 8. A cuboid container, with a bottom area of 4 square decimeters and a height of 10 cm, contains 5 cm high water. Now, a stone is immersed in the water and the water level rises I hope it can be finished today (10.7). It's urgent
- 9. The bottom area of a cuboid is 6 square decimeters, and the height is 15 centimeters. The volume is calculated
- 10. The cuboid is 12 cm long and 8 cm high. The sum of the areas of the two sides of the shadow is 200 square cm. What is the area of the cuboid?
- 11. A cuboid container, measured from the inside, has a bottom area of 200 square centimeters and a height of 30 centimeters. Pour 1 liter of water into the container to measure the depth of water______ Cm
- 12. A cuboid container, measured from the inside, has a bottom area of 200 square centimeters and a height of 30 centimeters. Pour 1 liter of water into the container to measure the depth of water______ Cm
- 13. Now there is an empty cuboid container a and a cuboid container B filled with water 24 cm deep. Pour part of the water in container B to a (supplement, bottom) Now there is an empty cuboid container a and a cuboid container B with 24 cm deep water. We need to pour part of the water in container B to container a, so that the water in the two containers is the same height. At this time, how many cm deep is container a? Urgent, want to segment formula, hope to have enthusiastic netizens to help (Note: container a is 40cm long, 20cm high and 30cm wide. Container B is 30cm long, 24cm high and 20cm wide.)
- 14. A cuboid glass jar, measuring from the inside, 50 cm long, 40 cm wide and 20 cm high. Now pour 1 liter of water into the glass jar, and the water depth is 100 cm______ Cm
- 15. There is a cuboid glass container. The container measures 40cm long, 30cm wide and 35cm high from the inside. He injects some water into the container until the water depth is 10cm. Finally, he puts a cube iron block with 20cm edge length into the water and finds that the top of the iron block is still higher than the water surface. So, what is the water depth at this time?
- 16. It is known that the volume of a spherical iron block is measured by a rectangular container with a side length of 8 cm and a height of 16 cm It is known that a rectangular container with a side length of 8 cm on its bottom and a height of 16 cm is used to measure the thickness of the container Measure the volume of a spherical iron block. The water in the container is 2 cm away from the mouth of the cup In the container, some water overflows. When the iron block is taken out, the water surface drops by 5cm Product
- 17. A cuboid with a square bottom is 8 cm high. If its height is increased by 1 / 3, its surface area will be increased by 24 square cm（ emergency
- 18. A horizontal cuboid with a side length of 8 cm and a height of 3.5 cm is on the bottom. What is the surface area and volume of the cuboid?
- 19. The bottom of a cuboid is a square. Unfold the side of the cuboid and it is a square with side length of 8 cm. Calculate the volume of the cuboid
- 20. The volume of a cuboid is 192 square centimeters, the bottom is a square with side length of 8 centimeters, and the surface area of the cuboid is ()