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The density of aluminum is 2.7 kg / M & sup3;, which means the physical meaning of
The density of aluminum is 2.7-g / cm & sup3; -, that is - 2.7 * 10 & sup3; - - kg / M & sup3;, read as - 2.7 kg / m3 --------, which means the mass of aluminum in 1 m3 is 2.7 * 10 & sup3; kg
When a solid ball with a density of 0.9 × 103kg / m3 is put into water and alcohol successively, the ratio of the volume of water discharged from the ball to the volume of alcohol discharged from the ball is______ What is the buoyancy ratio of the ball in water and alcohol______ (ρ alcohol = 0.8 × l03kg / m3)
When a solid ball with a density of 0.9 × 103kg / m3 is put into water and alcohol successively, the ratio of the volume of water discharged from the ball to the volume of alcohol discharged from the ball is______ What is the buoyancy ratio of the ball in water and alcohol______ (ρ alcohol = 0.8 × l03kg / m3)
RELATED INFORMATIONS
- 1. When a solid ball with a density of 0.9 × 103kg / m3 is put into water and alcohol successively, the ratio of the volume of water discharged from the ball to the volume of alcohol discharged from the ball is________ What is the buoyancy ratio of the ball in water and alcohol______ (ρ = 0.8 × l03kg / m3) There are some on Baidu, but I can't understand them,
- 2. The mass of a metal block is 386g and the volume is 20cm3. What is the density of this metal block kg / m3? Tonight's homework is due tomorrow~ Format: according to the known, ask, answer to write
- 3. When two solid metal blocks of density ρ A and ρ B are all immersed in water for weighing, the indication of the spring dynamometer is the same A. When ρ A is less than ρ B, they may have the same gravity in the air. B. when ρ A is greater than ρ B, they may have the same gravity in the air. C. when ρ A is less than ρ B, they may have the same gravity in the air. D. when ρ A is greater than ρ B, they may have the same gravity in the air
- 4. A solid metal block with density of ρ is hung on the hook of the spring scale. When it is weighed in air, the indication number of the spring scale is F1. When half of the volume of the metal block is immersed in the air, the spring scale will display the number of F1 If the indication of the spring scale is F2, then when the metal block is completely immersed in the liquid, the indication of the spring scale is, what is the density of the liquid?
- 5. A cylinder, its bottom radius is 3cm, its height is 5cm, what is its surface area? What is its volume?
- 6. Pour water from a cold water with a bottom radius of 10 cm into an empty glass with a bottom radius of 5 cm and a height of 8 cm. When the glass is full, the water surface of the cold water cup will drop
- 7. A cuboid is obtained by heightening a cuboid by 2cm (the bottom remains unchanged), and the surface area of the cuboid is 40cm larger than that of the original cuboid;,
- 8. The cuboid with square cross section is 30cm long. If the length is increased by 5cm, the surface area will be increased by 80cm
- 9. The upper bottom of a trapezoid is 12.5cm. Reduce the lower bottom by 3.5cm and change it into a parallelogram. At this time, the area is reduced by 7cm. What is the area of the original trapezoid?
- 10. The three sides of a right triangle are 6cm, 8cm and 10cm respectively. What's the area of the triangle? What's the area of the bottom side of the triangle with a length of 10cm How many cm is the height?
- 11. 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
- 12. Salt water with a density of 1.1 × 10 & sup 3; kg / M & sup 3; is needed for salt water seed selection
- 13. 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
- 14. [physical density of the second day of junior high school] when selecting seeds with salt water, the density of salt water should be higher
- 15. 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
- 16. 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
- 17. 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
- 18. 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
- 19. 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
- 20. 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