Two speakers create identical
240 Hz sound waves. A person is
1.47 m from Speaker 1. What is the minimum distance to Speaker 2
for there to be destructive
interference at that spot?
(Hint: v= A f = 343 m/s)
(Unit = m)

i don't know, you need to give me some answers.

explanation:

this could be newton#'s law of cooling. the cooling curve is exponential

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )