Physics · Acceleration due to gravity and its variation with altitude and depth
When tall buildings are constructed on earth, the duration of day night
When tall buildings are constructed on earth, the duration of day night
- A. slightly increases
- B. slightly decreases
- C. has no change
- D. none of these
Step-by-step solution
Constructing tall buildings moves mass from Earth's surface to higher altitude, increasing Earth's moment of inertia. By conservation of angular momentum (L = Iω constant), the angular speed ω decreases, so the rotation period (day length) increases slightly.
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