Does selectively permeable membranes allow only certain materials to pass through them

Write two to three sentences that describe the relationship between the antiwar movement and the counterculture

What industry was exempt from the child-labor laws passed in the factory act of 1833?

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.