11.   The light from a star moving away is seen at a lower frequency, or more red.

12.   The lower frequency also means that pagers have fewer gaps in coverage, since paging signals travel farther than those from cellular towers.

13.   The lower you get in frequency the lower you get in quantum energy and the less it can do to the cells in your body.

14.   These in turn produce a lower frequency within the audible range that is amplified and converted into sound by a loudspeaker.

15.   With little power, transmitters in lower frequencies can cover wide areas.

16.   Would we value different elements in jazz if we heard it, to borrow a phrase from the novelist Ralph Ellison, on the lower frequencies?

17.   You might also find that with music you prefer having the subwoofer enter the sound picture at a lower frequency.

18.   By Sunday morning, the radio station was back on the air but at a much lower frequency, reaching only a fraction of its usual audience.

19.   If running large buses is not economical because of poor passenger load, they should deploy smaller ones or operate with a lower frequency.

20.   Sickle cell trait is found in nonblacks as well, although at a much lower frequency.