Linda is a 29-year-old who had excruciating pain which started under her lower ribs on the right side. the pain eventually moved to her lateral abdomen and then into her right lower quadrant. which is most likely, given this presentation?

The correct answer is ureter stone.  

Urine passes from the kidney to the bladder via tubes known as ureters. A ureter stone refers to a mineral mass in the ureter that may or may not have arisen in the kidney and passed down into the ureter. A stone starts when mineral particles in the stagnated urine crystallize and produce a mass.  

If the ureter stone is small, it will lead to no symptoms. If it is big enough to result in obstruction, it will inhibit the flow of urine and become extremely painful, followed by cramping in the region of kidneys and lower abdomen that may afterward spread to the groin.  

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.