It took awhile to figure out what you were asking with this. I assume the u in us should actually be a Greek mu, so the figure you are looking for is the micro-second, which is equal to 1 x 10-6 seconds, or one millionth of a second.
The second in command of the US Army is the executive officer.
The second largest city in the US is Los Angeles.
The second in command of the US Army is the executive officer.
There are about 4.3 babies born each second in the US.
There is no official US holiday on the second Monday of November.
It was the second US State.
The only US state that has a D as the second letter is: Idaho
Jackson greatly opposed the Second Bank of the US, and sought to get rid of it.
John Adams
The second one is Chicago.
the second leading cause of death in the US is cancer.
You already answered your question. The second largest city in the USA is Los Angeles.