what is the difference between dense and hard?
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As adjectives the difference between hard and dense is that hard is resistant to pressure while dense is having relatively high density.
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And if someone calls you dense, they think nothing can get into your thick skull. Dense comes from the Latin densus which means thick and cloudy. In general, the word means packed tight and gives the sense that something is difficult to get through.
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Answer: Density is defined as mass per unit volume. Specific gravity is the density of a material at a certain temperature divided by the density of water at a certain temperature; the reference temperature is usually 20 degrees Celsius. Pycnometers measure volume.
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Density is the ratio between the mass and the volume of a body. Relative density, on the other hand, is the ratio between the density of an object (substance) and the density of some other reference object (substance) at some given temperature. Density is measured in, while relative density is dimensionless.
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Liquids are usually less dense than solids but more dense than air. Temperature can change a liquid's density. ... The farther apart the molecules are, the less dense the water is. A solid is usually denser than a liquid, so you might expect an ice cube to sink in water.
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Solids also have a high density, meaning that the particles are tightly packed together. In a liquid, the particles are more loosely packed than in a solid and are able to flow around each other, giving the liquid an indefinite shape. Therefore, the liquid will conform to the shape of its container.
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Density is a measure of mass per unit of volume. Density is a measure of mass per volume. ... An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).
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Explanation: As you go deeper in depth, pressure increases. Density = mass/volume. The layers beneath us due to pressure get packed to the point of being very dense.
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Density is defined as mass per unit volume. It has the SI unit kg m-3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material's density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m-3). It is therefore a relative quantity with no units.
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Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3).
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Most recent answer. Bulk density of any material is the weight of PARTIALLY COMPACTED material per unit volume. Bulk density of material is not equal to it's specific gravity as specific gravity is weight of FULLY COMPACTED material per unit volume.
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Mass density, usually just called "density", is mass (the amount of matter) per volume, while weight density is the amount of gravity exerted per volume.
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Density: The molecules of a liquid are packed relatively close together. Consequently, liquids are much denser than gases. The density of a liquid is typically about the same as the density of the solid state of the substance.
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The atmosphere and Earth's interior are layered by density. Gravity pulls more strongly on denser materials so denser materials are at the center of things. Earth's core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer.
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You probably learned early on in science classes that density is mass divided by volume, or the "amount" of a substance in a certain space. ... Molecular weight and density seem extremely similar, but there's an important difference. Molecular weight is a substance's mass per mole.
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True density - The mass of a particle divided by its volume, excluding open and closed pores. ... Bulk density - The apparent powder density under defined conditions. Tap density - The apparent powder density obtained under stated conditions of tapping.
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Bulk density is defined as the dry weight of soil per unit volume of soil. Bulk density considers both the solids and the pore space; whereas, particle density considers only the mineral solids. Figure 2.6 illustrates the difference between bulk density and particle density. ... The dry soil weighed 375 g.