Descride the period, position and function of a geostationary satellite

An object in such an orbit has an orbital period equal to the Earth's rotational period, one sidereal day, and so to ground observers it appears motionless, in a fixed position in the sky. ... Geostationary satellites are launched via a temporary orbit, and placed in a slot above a particular point on the Earth's surface.

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dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

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