The volume of ice is 10dm ^ 3, and the mass is () kg. After melting into water, the mass is () kg, and the volume becomes () m ^ 3

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• 1. The mass of ice is 9kg, the density is 0.9 × 10 ~ (- 179); kg / M ~ (- 179). (1) calculate the volume of ice. (2) calculate the mass of water if 3DM ~ (- 179); of ice melts into water after heat absorption (1) Can we use scientific counting method to calculate the results of the test?
• 2. Put a solid cubic wood block with a length of 10cm on one side into the water, overflow 600g of water from the cup, and calculate the buoyancy, gravity and density of the wood block
• 3. The volume of 8 square decimeters of cube aluminum block in the area of 1.5 square decimeters of horizontal desktop, find the aluminum block on the desktop pressure is how much The best formula is the same
• 4. There is a cube aluminum block with a mass of 2700g. Put it on the horizontal table with an area of 0.5m2, and calculate the pressure of the aluminum block on the horizontal table (known density of aluminum block is 2.7 * 10 ^ 3kg / m3) G please take 9.8n/kg
• 5. The cube iron block with a mass of 7.9kg is placed on the horizontal table with an area of 0.5m2. What is the pressure on the horizontal table? V iron = m / ρ = 7.9kg/7.9 × 103kg / m3 = 0.001m3, so the side length of iron block is 0.1M, and the bottom area s = 0.01m2 So s = 0.01m2, P = mg / S = (7.9kg × 10N / kg) / 0.01m2 = 7900pa Because the area of the table is larger than the bottom area of the iron block, the contact area is the bottom area of the iron block
• 6. A cube iron block with a mass of 7.8kg is placed in the center of a horizontal tabletop with an area of 0.5m & sup2;, and the following questions are asked: (1) how much PA is the pressure of the iron block on the tabletop? (2) how much PA is the pressure of the iron block on the tabletop if a force of 12n is applied on the iron block along the vertical direction? (ρ iron = 7.8 × 10 & sup3; kg / M & sup3;
• 7. What is the pressure on a square table with an area of 1 square meter and a weight of 20 N What is the pressure on the table when a 20 N cube with an area of 0.5 square meters is placed on a horizontal table with an area of 1 square meter?
• 8. There is a 10 cm long cube with a mass of 7.8 kg, which is placed on the table with an area of 1 square meter (1) What is the density of the block? (2) what is the pressure of the block on the desktop? (3) what is the pressure of the block on the desktop?
• 9. There is a cube with a side length of 10cm and a weight of 12n, which is placed in the center of the horizontal desktop with an area of 1 m2. At this time, what is the pressure of the cube on the desktop?
• 10. How much does a cubic meter of air weigh
• 11. How to make ice in the refrigerator?
• 12. Take out a 500cm3 ice cube from the refrigerator and melt it in the outdoor sunlight. After all the ice cubes are melted into water, the quality of the water is 100%______ And the volume is______ ．
• 13. What is the mass of water and the volume of water after all 1m3 ice is melted into water. (the density of ice is 0.9 × 103kg / m3)
• 14. After water becomes ice, its volume will increase by 1 / 10. What is the volume of 3.3 cubic meters of ice after melting
• 15. When it floats on the surface of water, half of its volume is immersed in water, and the density of water is p A. The density p / 2 B and buoyancy of the object are mg C. The density of the object is m / a cubic D, and the buoyancy of the object is PGA cubic D Please explain why,
• 16. The density is 0.5 × 10 cubic kg / M and the volume is 2m. When it floats on the water surface and is still, the gravity of the block is calculated
• 17. What is the density of an object I know the formula, but I don't know how to calculate it. How to calculate it is different from the answer. How to multiply (divide) numbers? The unit is right!
• 18. In addition to v = m / density, what else is the volume of an object?
• 19. When two metals with the same volume (density P1 and P2) are cast into alloy, what is the alloy density?
• 20. The volume of the hollow aluminum ball is 30cm3, the mass is 27g, and the total mass is 43g after filling with a certain liquid?