Grains of fine California beach sand are approximately spheres with an average radius of 50 pm and are made of silicon dioxide, which has a density of 2.6 x 103 kg/m3 What mass of sand grains would have a total surface area (the total area of all the individual spheres) equal to the surface area of a cube 0.8 m on an edge?

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Q: i think the answer should be 0.0057 cm

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Units and Dimensions

These are generally defined as the terms which precede or describes the dimensions further. These are also further divided into two parts namely fundamental units and the derived units.