Accurate measurements have been collected for more than a century.
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).
[ Answer ]
1 - Command Economies
2 - Market Economies
3 - Tradition Economies
[ Explanation ]
Command Economies:
This is where production, investment and prices are all controlled and determined by the government. Command Economies are not controlled by free market. The Government decides how much a product should cost and what price they should be put for sale as.
Market Economies:
This is where the product prices and value are determined by the product keeper and/or seller. The seller decides how much they want to sell it for, not the Government. This also comes with supply and demand. Prices can increase or decrease as the seller wishes.
Tradition Economies:
This is where the economy relies on customs and history. They go by what has been done in the past and what has worked out before. Traditional Economies depend on farming, agriculture, fishing, and natural sources.
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Answer:
Virus's,
there would be stealing too
Explanation: The silk road was one of the largest roads built for trading across countries and as they traded the virus's were spreading there was also I really bad type of virus's but I forgot the name. I think you should research about it to get more points and i think this is history related not geography. Enjoy.