if the worlds populations moved to the north pole and the south po

if the world's populations moved to the north pole and the south pole, would the 24-hour day become longer, shorter, or stay the same? Need explanation!!! Solution The length of a day is defined in modern times as 24 hours, or 1440 minutes, or 86400 seconds. And the second is defined by atomic clocks. (The exact definition of the second is: "the duration of 0 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom".) So for a physicist the day stays the same period of time. But you probably mean if the rotation period of the Earth changes. Due to conservation of angular momentum, when rotating masses move closer to the rotation axis, the speed of rotation increases . But we constitute such a low percentage of the total mass of the Earth that the effect of us moving to the poles is negligible. (If it were, this effect would decrease the length of the day, though.)