The landmark event in the 1700s that advanced human services in the United States occurred when Congress established a federal chain of hospitals for the relief of .

Sick seaman and Disabled.

Explanation:

By the 1700s, several American port-cities raised rules for isolation of the sick. Several cities, including New York,  Philadelphia, Boston, and Baltimore, established councils to enforce isolation rules for sick seaman.

In the 1700s, cities began to build hospitals for the sick people and public institutions for the mentally ill. In Virginia in 1773, the first public mental hospital establish along with hospitals for others in Philadelphia in 1752 and New York in 1771.

c. mass = force / accellaration

step-by-step explanation: