2 Answers

Jaeho · Answer 1 · 2017-01-15T15:20:16+0000

no they don't have to be the same material. for example A watch made of gold and a brick made of gold have different masses and volumes, but they can have the same density.

Asvd · Answer 2 · 2017-01-16T12:25:47+0000

no they are not the same material because having the same density doesnt mean its the same material also they can have a different density and be the same material

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