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Which physical phenomenon is primarily caused by density differences within fluids?
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19. Fluid Mechanics
Density
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In the context of density, what is the specific gravity of water (relative to water at )?
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Understand that specific gravity is defined as the ratio of the density of a substance to the density of a reference substance, typically water at 4°C for liquids.
Recall that the density of water at 4°C is approximately 1000 kg/m³, which is considered the standard reference density.
Write the formula for specific gravity as: \(\text{Specific Gravity} = \frac{\text{Density of substance}}{\text{Density of water at 4}^\circ\text{C}}\).
Since the problem asks for the specific gravity of water relative to water at 4°C, substitute the density of water for both numerator and denominator.
Recognize that dividing the density of water by itself results in a specific gravity of 1, meaning water has a specific gravity of 1 relative to itself at 4°C.
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