Floating bodies

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The ship floats because it's designed as a hollow structure that displaces a large volume of water. The weight of water displaced by the ship's submerged part equals the ship's total weight, creating

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Density is the mass of a substance per unit volume. Formula: Density = Mass/Volume. Units: g/cm³ or kg/m³. Example: If 50 cm³ of wood has mass 30g, then density = 30g/50cm³ = 0.6 g/cm³.

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Ice has lower density (0.92 g/cm³) than liquid water (1.0 g/cm³). When water freezes, its molecules arrange in a hexagonal structure with more empty spaces, making ice less dense. Since ice density <

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Buoyant force = Weight in air - Weight in water = 500g - 300g = 200g = 2N. This apparent loss of weight (200g) equals the weight of water displaced by the stone, demonstrating Archimedes' principle.

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Relative density = Density of object/Density of water. It tells us how many times denser an object is compared to water. It has no units because it's a ratio of two quantities with the same units (den

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Pure milk has higher density than water. When water is added to milk, the mixture's density decreases. A lactometer (hydrometer for milk) sinks deeper in the diluted milk than in pure milk, indicating

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Archimedes' principle: When a body is immersed in a fluid, it experiences an upward buoyant force equal to the weight of fluid displaced by the immersed portion. Example: A person feels lighter in a s

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Underwater, the stone experiences buoyant force equal to the weight of water it displaces, making it feel lighter. When lifted out of water, there's no buoyant force from water, so we feel its full we