What is the highest gravity planet a human could live long term on

In what for do plants utilize nitrogen? why do they need nitrogen?

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?