Why did the einstein-szilard letter warn president roosevelt about in 1939?

that the us was secretly researching nuclear weapons

that germany was researching nuclear weapons

that the us planned to use nuclear weapons against japan

that germany planned to use nuclear weapons against japan

In 1939, the Einstein-Szilard warned President Roosevelt that Germany was researching nuclear weapons.

Explanation:

The Einstein-Szilard letter was sent to President Franklin Delano Roosevelt in August 1939. It warned Roosevelt that Nazi Germany could be conducting research on the possibility of using nuclear fission to create atomic bombs, and suggested that the United States should also begin to conduct research in this regard themselves.

i can't beat you to a pulp if i'm not close enough.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.