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There is some water in the cylindrical container. The bottom radius of the container is 5cm, the height is 20cm, and the water depth is 10cm. Now, a cylindrical iron bar with the bottom radius of 3cm and the height of 25cm is vertically inserted into the container to make the bottom of the iron bar contact with the bottom of the container. At this time, the water depth is lower______ Cm
3.14 × 52 × 10 ^ (3.14 × 52-3.14 × 32), = 785 ^ 50.24, = 15.625 (CM), a: the water depth is 15.625 cm. So the answer is: 15.625
The radius of the bottom of a cylindrical container is 8 cm. Put an iron ball into the container containing water, and the water surface rises by 5 cm to calculate the volume of the iron ball
Quick. Another question: there is a wheat pile which is similar to a cone. Its bottom area is 6.28cm square and its volume is 12.56cm cubic. What's its height?
"True red Alice":
（1）（8cm）²×3.14×5cm＝1004.8cm³
A: the volume of the iron ball is 1004.8 cubic centimeters
（2）12.56cm³÷6.28cm²×3＝6cm
Answer: the height is 6cm (the cm of this question should be changed to DM only) and the height is 6dm
Good luck. Goodbye
There is some water in the cylindrical container. The bottom radius of the container is 5cm, the height is 20cm, and the water depth is 10cm. Now, a cylindrical iron bar with the bottom radius of 3cm and the height of 25cm is vertically inserted into the container to make the bottom of the iron bar contact with the bottom of the container. At this time, the water depth is lower______ Cm
3.14 × 52 × 10 ^ (3.14 × 52-3.14 × 32), = 785 ^ 50.24, = 15.625 (CM), a: the water depth is 15.625 cm. So the answer is: 15.625
It is known that the air density is 1.29kg/m3 and the hydrogen density is 0.09kg/m3,
The known air density is 1.29 kg / m ^ 3, and the hydrogen density is 0.09 kg / m ^ 3. A meteorological balloon filled with hydrogen has a volume of 10 m ^ 3, and if the shell mass of the balloon is 3 kg, it will have the most oxygen______ Kg of the instrument
RELATED INFORMATIONS
- 1. A hydrogen balloon, with a volume of 5000m3 and a weight of 15000n, is known to have a density of 0.09kg/m3 for hydrogen and 1.29kg/m3 for air
- 2. A piece of ice with a volume of 0.1m3 floats on the water surface (ρ ice = 0.9 × 103kg). How to calculate the buoyancy of the ice A piece of ice with a volume of 0.1m3 floats on the water surface (ρ ice = 0.9 × 103kg) to calculate the buoyancy of the ice. Why is the buoyancy of ice calculated by its density rather than the density of water
- 3. The buoyancy of a wood block with a mass of 1kg and a density of 0.4 × 103kg / m3 is () A. 1kgB. 5kgC. 9.8ND. 24.5N
- 4. When a is put into alcohol (ρ = 0.8 × 103kg / m3) and B is put into water at rest, the ratio of buoyancy is 3:2, then the density of B is () A. 0.6×103kg/m3B. 0.8×103kg/m3C. 1.2×103kg/m3D. 1.5×103kg/m3
- 5. The surface area of a 2-meter-long log increases by 48CM after it is cut into three sections. The original volume of the log is () cm
- 6. The experiment of measuring the density of brine Here is a scale, a cuboid block, water and beaker. Please design an experiment to measure the density of brine
- 7. [physical density of the second day of junior high school] when selecting seeds with salt water, the density of salt water should be higher
- 8. Salt water with a density of 1.1x10 ^ 3kg / m3 is needed for seed selection. Now 500ml salt water is prepared, and its mass is 0.6kg. Is this salt water suitable for seed selection
- 9. Salt water with a density of 1.1 × 10 & sup 3; kg / M & sup 3; is needed for salt water seed selection
- 10. The density of aluminum is 2.7/10 kg / m, which means that the physical meaning is to cut off half of the aluminum, and the remaining half of the density is 0 1: The density of aluminum is 2.7/10 kg / m, which means that the physical meaning is to cut off half of the aluminum, and the remaining half of the density is 0 2. Comparing iron and copper blocks with the same mass, we can see that the volume of iron and copper blocks with the same volume is larger 3. The density of oxygen is 1.43 and the density of return water is 1.03/10
- 11. The inner bottom radius of a cylindrical container containing water is 5cm, 20cm deep and 15cm deep. The iron cylinder with bottom radius of 2cm and height of 17cm is vertically placed on the container The depth of water in the container is several cm
- 12. The height HCM of a certain volume of water in the cylinder is inversely proportional to the square of the cross-sectional area of the cylinder To find the functional relationship between H and s (2) When 1cm cubic water is dropped into the measuring cylinder with 1cm square and 5cm square cross-sectional area, what is the height of liquid level in the measuring cylinder (3) From (2), which of several measuring cylinders with the same volume of water but different cross-sectional area is more convenient for reading?
- 13. A cylindrical measuring cylinder with a bottom radius of 5cm. Take a conical iron block out of the measuring cylinder and the water surface drops 3cm. What is the volume of this iron block?
- 14. The volume of a cylinder is 325cm and the bottom area is 25cm. What is the height of the cylinder
- 15. When a 10 cm long cylinder is raised by 5 cm, its surface area increases by 31.4 cm As above! No equations
- 16. Cut a cone with a bottom radius of 5cm and a height of 20cm into two cylinders of the same size, and the volume of the two small cylinders is less than that of the cylinder What's the difference between the sum of the surface area and the cylinder before the section?
- 17. The volume of a cylinder with a bottom radius of 5cm and a height of 10cm is______ cm3．
- 18. The surface area of a 50cm long cylinder is increased by 40cm after it is sawed into two identical small cylinders
- 19. I only give you a measuring cylinder with an appropriate amount of salt water. It's 80 ml. the mass of salt is 21.2 g and the volume of water is 70 ml. how to calculate the density of salt water
- 20. When measuring the density of salt water, they measured that the mass of salt water was 105g, the volume of salt water was 100ml, and the known density of salt was 2700kg / m3, Calculate the salt content t of this brine (the mass of salt in each cubic meter of brine)