What social medium was invented in 1971 by the computer engineer ray tomlinson? (according to tomlinson, the symbol @ ("at") was the obvious choice for the symbol to separate the names of individuals from their machines.)

Explanation:

Ray Tomlinson was the computer programmer credited with the implementation of the first email program on the Arpanet system, it was able to send emails between users on different hosts that were connected to ARPANET. It was not possible earlier. For this he used @ sign and separated the username from the machine name. This scheme is still used in the e mail addresses.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

the reform movements that arose during the antebellum period in america focused on specific issues: temperance, abolishing imprisonment for debt, pacifism, antislavery, abolishing capital punishment, amelioration of prison conditions (with prison's purpose reconceived as rehabilitation rather than punishment), the humane treatment of animals, the humane and just treatment of native americans, the establishment of public institutions for the care of the destitute, orphans, blind, and mentally ill, the establishment of public schools, the abolition of tobacco use, vegetarianism, health reform, homeopathic medicine, woman's rights (including, at first, especially the establishment of a woman's right to own property apart from her husband and her right to sue for divorce), and the amelioration of labor conditions (including higher pay, the right to form unions, the right to strike, and the demand for limits on the number of work hours, and safe working conditions).

explanation: