What was the first American steam railroad to carry both passengers and freight?

The first American steam railroad to carry both passengers and freight was the Baltimore & Ohio Railroad.

It began operation in 1830, powered by the Tom Thumb locomotive built by American manufacturer Peter Cooper (1791-1883).

For what World’s Fair was the Space Needle in Seattle erected? The 600-foot futuristic steel structure in Seattle, known as the Space Needle, was erected for the Century 21 exposition in 1962.
In Will Success Spoil Rock Hunter (1957), what product brought adman Rock Hunter (Tony Randall) to sudden fame? Stay-Put Lipstick brought adman Rock Hunter to sudden fame, which was endorsed by sex symbol Rita Marlowe (Jayne Mansfield).
Has the U.S. Supreme Court ever had more or fewer than nine members? Yes. Originated by the Constitution, the Court has been regulated in size by Congress. The number of justices varied, from six to ten, until 1869, when Congress voted to set the membership at…
What did the sign “NINA” in front of 19th-century factories mean? The sign "NINA" in front of 19th-century factories in the U.S. meant "No Irish Need Apply." It expressed native-born American prejudice against the two million Irish immigrants who arrived in the U.S. between…
What is the oldest U.S. newspaper still being published? The Courant, published in Hartford, Connecticut, since 1764, is the oldest U.S. newspaper still being published.
In the American Revolution, how many men were required for a regiment in the Continental army? In November 1775, the Continental Congress advised that a regiment have eight companies of 91 officers and men apiece, for a total of 728. The actual size of the regiments varied per state.