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).
The Apartheid was the policy that was put into place in South Africa in 1948. This policy separated the all of the black Africans, Asians, and Europeans. The Apartheid was finally dismantled after numerous negotiations from 1990 to 1993.
Channel Tunnel, CN Tower, Empire State Building, Golden Gate Bridge, Itaipu Dam, North Sea Protection Works (Netherlands), Panama Canal. Hope this helps!
Answer:
As humans migrated, they had to adapt to many different environments
