9 The force F keeping the moon in its orbit round the earth is inversely proportional to
the square of the distance r from the earth.
If F = 6 x 105 KN, and r = 8 x 108 m,
Find: 1
(a) the equation connecting F and r
(b) ) the value of F when r = 16 x 108 m
(c)
the value of r when F= 24 x 109 KN.

What is your question then

Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.

Na+ loss through sweet plus the dilution has lowered na+ concentration outside of neurons, altering the na+ equilibrium potential. sodium exists more outside the cells than inside. when na+ is lost by sweat plus the dilution( because they drink a lot of water) changes the concentration outside the cell, forcing the water to enter the cell and attempt to balance the concentration inside/outside.the problem is that the abundance of water will cause the cells to swell. most cells can adapt, however, the brain cells can't that's why the runner has confusion and can't control the muscles.  if not treated and this occurs in less than 48 hours, it can be immediately fatal .

The answer is mediterranean agriculture