Answer:
Extremely accurate timekeeper. ATOMIC CLOCK.
hope this helps
for a crossword right
Voting patterns were determined by vague cultural inclinations
<span>It used U-boats to sin ships carrying supplies to Britain</span>
Answer:
Louisiana Purchase, Texas Annexation, the Mexican Cession, the Erie Canal, the Homestead Act, the transcontinental railroad and the California Gold Rush are some examples of how the US started expanding its territory in the 1800s.
Explanation:
