Two coaxial conducting cylindrical shells have equal and opposite charges. the inner shell has charge +q and an outer radius a, and the outer shell has charge -q and an inner radius b. the length of each cylindrical shell is l, and l is very long compared with b. find the potential difference va − vb between the shells. (use any variable or symbol stated above along with the following as necessary: k for the coulomb's constant.)

In 1859, charles darwin published the first edition of on the origin of species, which explained his observations of various groups of animals that showed great similarities but minor differences. darwin concluded that if a population of one species separates into two different populations that live in separate locations, then over the course of many generations the different populations can develop into different species. this idea predicted many future biological findings and became the basis of modern biology. darwin’s explanation for why different species exist is best described as a(n) law. theory. inquiry. hypothesis.