Task id8907
The moment of inertia of a homogeneous ball about an axis passing through its center is 2mR2/5. Assuming the Earth to be homogeneous, calculate the kinetic energy due to its daily rotation. Compare this value with the annual electricity generation worldwide. (The mass of the Earth is 6 * 1024 kg, world electricity production is about 5 * 1012 kW * h per year.)
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