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The tangential speed of Earth's rotation at a point on Earth can be approximated by multiplying the speed at the equator by the cosine of the latitude. [42] For example, the Kennedy Space Center is located at latitude 28.59° N, which yields a speed of: cos(28.59°) × 1,674.4 km/h = 1,470.2 km/h.
The new findings also confirm that the changes in rotational speed follow a 70-year cycle, said study coauthor Dr. John Vidale, Dean’s Professor of Earth Sciences at the University of Southern ...
Earth's rotational speed is ν = 1 / 2π dθ / dt , and a day corresponds to one period P = 1 / ν .A rotational acceleration dν / dt gives a rate of change of the period of dP / dt = − 1 / ν 2 dν / dt , which is usually expressed as α = ν dP / dt = − 1 / ν dν / dt .
Earth's rotational velocity is not constant over time. Any motion of mass in or on Earth causes a slowdown or speedup of the rotation speed, or a change of rotation axis. Small motions produce changes too small to be measured, but movements of very large mass, like sea currents, tides, or those resulting from earthquakes, can produce ...
But after a long trend of slowing, the Earth’s rotation is now speeding up because of changes in its core. For the first time ever, a second will need to be taken off.
This minuscule change in time means we might need to consider a negative leap second.
Cutaway of the Earth showing the inner core (white) and outer core (yellow). Inner core super-rotation is the eastward rotation of the inner core of Earth relative to its mantle, for a net rotation rate that is usually [clarification needed] faster than Earth as a whole.
Then, Earth’s rotation itself causes a measurable change within the photons. It may seem silly to spend so much time and so many resources on clocking the speed of Earth’s rotation ...