What false scientific theory did the nazis use to justify their persecution of jews

Space is not completely empty. there are small particles in space. what happens when these particles come together?

What two different approaches did the knights of labor and the american federation of labor take in building a union organization? a) the knights of labor accepted only unskilled workers; the american federation of labor accepted only skilled workers. b) the knights of labor accepted skilled and unskilled workers; the american federation of labor accepted only skilled workers.c) the knights of labor refused to accept african american or chinese workers; the american federation of labor accepted all workers.d) the knights of labor accepted workers from a single industry; the american federation of labor accepted workers from several industries.

Which is not a factor that determine the outcome of the election of 1960? the televised debates john kennedy's heroism in world war ii john kennedy's charm richard nixon's tolerance of connunism