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The usage of five laws of Archimedes' principle on F floating When will f-float = g-row be used? F floating = ρ liquid GV discharge when to use? When is f float = f lower surface - f upper surface = f2-f1 row used? F-float = G-F when to use? When is f-float = g-row used? Help me make it clear If there are any other formulas, let's be clear~
F buoyancy = g object (floating state, suspended state) f floating = g row = m row g = ρ liquid GV row (the most primitive and most commonly used buoyancy law, applicable to any state premise: there must be conditions in the title) f floating = f lower surface - f upper surface = f2-f1 row (not very commonly used, generally useful when there is a question to tell you
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- 1. Why does Archimedes principle f float = g row I understand the derivation process of the formula. Don't tell the story of the crown
- 2. Archimedes' principle can be expressed by the formula F floating = P liquid GV. What is v discharge liquid? Detailed point! A question a question answer!
- 3. On the physical problems of Archimedes principle There is a metal ball hanging at the lower end of the spring dynamometer. The indication of the spring dynamometer is 10N. If half of the metal ball is immersed in water, the indication of the spring dynamometer is 8N. If the metal ball is completely immersed in water, what is the indication of the spring dynamometer?
- 4. Archimedes principle problem g row = f float = m row g right, so m row and so on are not equal to the mass of the object put in? There is a question: put a 10 cm long solid cube gently into a beaker full of water (here I ask the first question, is it completely submerged?). When the wood block is still, 600 g of water will overflow from the beaker (the second question is as our teacher said: F floating = g row = m row, g = ρ liquid (here the liquid is water) GV row, then = 1 × 10 & # 179; kg / M & # 179; 8 N / kg × 1000 × 10 ^ - 6 is equal to 9.8 N, but it can be calculated with m row g = 0.6 kg × 9.8 N / kg = 5.88 n. who can tell me how this is all the same? The density of water is the same. The volume of water discharged is the same. The first one is 1.0 × 10 & # 179; × 1000 × 10 ^ - 6 = 1 kg. The second one is 600 g = 0.6 n. why is it different!)
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- 13. The mathematical expression of Ohm's law is______ The units of the three physical quantities I, u and R in the formula are______ 、______ 、______ ．
- 14. What is the mathematical expression of Ohm's law of the whole circuit?
- 15. The expression of Ohm's law in AC circuit is?
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- 19. What are the common formulas of the law of conservation of mechanical energy?
- 20. What is the reason for the small air resistance when a dense object falls (in the experiment to verify the law of conservation of mechanical energy)?