The biggest city in the world is actually Tokyo in Japan, but it depends which aspects in your question you are looking for.
In terms of population, Tokyo.
In terms of land mass, New York, USA.
The reciprocal is when you flip a fraction. So the reciprocal would be 10/7.
All men are created equal, they are endowed by their creator certain unalienable rights , and Pursuit of life, liberty, and happiness.
<span> John Aycliffe was the person who had arrived
Hope this helps ^-^
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Do u mean like the geosephere And hydrosphere?