You need to know the laws<span> of motion and gravity </span>discovered<span> by English physicist Isaac </span>Newton<span>, and the </span>laws<span> of orbital motion</span>discovered<span> by German astronomer Johannes Kepler. ... </span>Newton's law<span> of universal gravitation states that gravitational force decreases with distance and mass.</span>
Mit'a (Quechua pronunciation: was mandatory public service in the society of the Inca Empire. Historians use the hispanicized term mita to differentiate the system as it was modified and intensified by the Spanish colonial government, creating the encomienda system.<em><u>The answer is A.</u></em>
