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a small piece of aluminum the size of a penny will have the exact same density as a piece the size of a football. the reason for this is because density is not dependent on the size of a sample. 
the mass density or density of a material is defined as its mass per unit volume. the mass density of a material varies with temperature and pressure. (The variance is typically small for solids and liquids and much greater for gasses.) Increasing the pressure on an object decreases the volume of the object and therefore increase its density. Increasing the temperature of a substance (with some exceptions) decreases its density by increasing the volume of that substance. so unless the temperature or pressure is different the two pieces of aluminum will always have the same density.

The density of a small sized aluminum piece is same as the size of a a large piece of aluminum, as the density is size and shape independent.

What are the factor affecting density ?

The density of a matter is derived in terms of  mass divided by its volume

The factors affect the density directly are are mass and volume.  

More mass refers to the higher the density or a mass is condensed into a smaller space, the density is higher.

When the Volume increases  with the same mass decreases density, where as a decrease in volume with the same mass increases density.

solid state  has indirect effect that shows highest density, a liquid has a density between a solid and a gas shows  lowest density.

Higher temperature indirect factor  lower density, similarly  a higher pressure refers to higher density.

Learn more about Density, here:

https://brainly.com/question/12006917

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