There is not enough information to answer the question. A cube can be of almost any size. In principle, its side length can range from
the Planck length = 1.616*10-35 metres, which gives a volume 4.2*10-105 cubic metres, to
the approx size of the known universe = 14 billion light years implying a volume of approx 2*1078 cubic metres.
Furthermore, a cube of "normal" size can be made of a range of materials and its weight will depend on the density of that material.
So, in order to get a sensible answer, you need to specify the size and the density of the material.
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The cube has a larger volume.
If a cube measures 5 cm on each end then the total volume of the cube would be 125 cubic cm. Assuming that the cube is actually made of the same steel, 125 x 7.8 = 975g
An aluminum cube measures 8cm on each edge Aluminum weighs 2.7grams per cubic cm how much does the cube weigh? For a cube the length = width = height = 8 cm Volume = length * width * height Volume = ___ * ___ * ___ = ____ cubic cm Aluminum weighs 2.7grams per cubic cm That means each cubic cm of Aluminum weighs 2.7 grams. 5 cubic cm weighs 5* 2.7 = 13.5 cubic cm Multiply your Volume * 2.7 grams per cubic cm
It depends on the density of the stone. This can vary from 0.64 g per cc for pumice (it will float on water) to 3.4 g per cc for peridotite.