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If you wanted to get different colors from exactly the same material, you could use it in different concentrations. For example, human skin is colored by just one pigment, which is melanin, yet it produces a wide range of colors (combined with the background pinkish white of skin and the circulatory system).

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What two things have the same mass but different densities?

Objects with the same mass but different densities could be a piece of wood and a piece of metal. They can have the same weight when measured on a scale, but their volume and density would be different due to the difference in how tightly packed the molecules are in each material.


Does the same amount of different material need the same amount of heat to have the same change in temperature?

No, different materials have different specific heat capacities, which refers to the amount of heat required to raise the temperature of a unit mass of that material by one degree Celsius. So, the same amount of different materials would not need the same amount of heat to achieve the same change in temperature.


What is the definition of anisotropic material?

An anisotropic material is a material which does not behave the same way in all directions. Take wood for example. Wood is very strong along the grain. Against the grain, however, it will easily break. The opposite of an anisotropic material is an isotropic material. Most metals (steel, aluminum) are isotropic materials. They respond the same way in all directions.


If two objects are the same size will they have the same mass?

Not necessarily. Mass is a measure of the amount of matter in an object, while size refers to the dimensions of the object. Two objects of the same size may have different densities, which would result in different masses.


Does every material have the same index of refraction?

No, different materials have different indices of refraction. The index of refraction is a measure of how much a material slows down light as it passes through it, and it varies depending on the material's composition and density.