일반물리학 1 — Measurement: Problem 24

24 Grains of fine California beach sand are approximately spheres with an average radius of 60 \(\mu\)m and are made of silicon dioxide, which has a density of 2600 kg/m\(^3\). 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 1.00 m on an edge?