If a line is perpendicular to each of two intersecting lines at their point
of intersection, then the line:

What happens to rock when acid reacts with it?

Which was not a country that massively built up its navy in the early 1900s? germany china united statesbritain

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted