A piece of wood has a volume of 100 cubic centimeters and a density of 600 kg / m3. What is the buoyancy of the wood at rest

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• 8. Xiaodong wants to estimate the density of some kind of oil, ρ oil. The measuring tool he has is only a scale. Xiaodong uses the equipment around him to design an experimental scheme. First, find a straight hard rod, hang it at o point with a thin line, and the hard rod is balanced in the horizontal position. Then hang the metal block B with known density of ρ at C on the left end of the hard rod, and find a weight a at the right end of the hard rod, and adjust the weight a At this time, the position of the weight hanging on the hard rod is e, as shown in the figure. The following is part of the experimental steps for Xiaodong to measure ρ oil. Please complete the experimental steps according to Xiaodong's experimental ideas (1) Measure the length l0 of OE with a scale; (2) immerse the metal block B in the oil to be measured, and move the weight a from e to D, and the hard rod will be balanced in the horizontal position again; (3)___ (4) the formula for calculating ρ oil by using the physical quantity measured above and the known quantity in the question is as follows:___ ．
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• 11. A block of wood has a volume of 100 cubic centimeters and a density of 600 kg / m3. When you press it all into the water by hand, how much buoyancy does the block bear?
• 12. The volume of the wood block is 100 cubic centimeter, and the density is 0.6 * 10 cubic meter. Q (1) when you press it into the water, what is the buoyancy of the wood block (2) How much pressure does the hand put on the block at this time?
• 13. The volume of a piece of wood is 200cm3, and its density is 0.8 times 10 cubic kilogram per cubic meter. If you immerse it in the water and let it go, why can't the piece of wood be suspended in the water? When the piece of wood finally floats on the water, how large is the volume immersed in the water when it is still?
• 14. A piece of wood has a volume of 200 cubic centimeters and a density of 0.8 * 10 cubic kilograms per cubic meter. Immerse it in water and let it go. Why can't a piece of wood be suspended The volume of a wood block is 200cm ^ 3, and the density is 0.8 times 10 ^ 3kg / m ^ 3. Let it go after immersing it in the water. Why can't the wood block be suspended in the water? When the wood block finally floats on the water, how large is the volume immersed in the water when it is still?
• 15. A piece of wood has a volume of 200 cubic centimeters and a density of 0.8 * 10 cubic kilograms per cubic meter. Immerse it in water and let it go. Why can't a piece of wood be suspended
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