Afluid flows through a horizontal 0.1 inch diameter pipe. when the reynolds number is 1200, the head loss over a 15-ft length of the pipe is 7.4 ft. at this condition, what is the friction factor f?

c, 1a hope this

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y