Answer:
One side of the moon always faces the earth, which is called synchronous rotation. In other words, the length of time the moon rotates or revolves around its axis is the same as the length of time it takes to orbit the earth... Therefore, our moon always has a side facing the earth, which we call the near side of the moon.
Marshland
mountainous
tropical
Answer:
Positive Pion, Negative Pion and Neutral Pion
Explanation:
Pi-meson or also known as pion is one of any of the three (3) subatomic particles which characterizes of being unstable of its nature. The charged pions
π+
and
π−
decay with a mean lifetime of 26.033 nanoseconds or 2.6033×10−8 seconds, and the neutral pion
π0
decays with a mean lifetime of 84 attoseconds (8.4×10−17 seconds).
