A good example of this is a shot put used at the Olympic Games. Or a billiard ball.
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Yes, John Dalton's model of the atom proposed that atoms were small, solid spheres with predictable mass for each element. He also believed that atoms of different elements had different masses.
Solid sphere model Planetary model Quantum mechanical model
Solid sphere model Planetary model Quantum mechanical model
core
Measure the diameter and from that calculate the volume, then determine the mass of the sphere on a weighing device. Then it's just density = mass/volume ========================== It again depends on the sphere whether its hollow or its a solid sphere