Primary source would be you doing the research yourself. secondary source would be someone whom you get the studies off of
Answer:
Russia
Explanation:
most economic developed country
PACES!
2. lean
3. career
4. burgle
5. fiery
6. conflict
7. emphasize
8. Moravian Brethren
9. Nikolaus Ludwig von Zinzendorf
States that a particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers