Answer:The first five-year plan (Russian: I пятилетний план, первая пятилетка) of the Union of Soviet Socialist Republics (USSR) was a list of economic goals, created by Communist Party General Secretary Joseph Stalin, based on his policy of Socialism in One Country.
Explanation:
Three important resources include energy, mineral, and timber.
Energy (natural gas, crude oil, crude bitumen (oil sands) and coal)
Mineral (gold-silver, nickel-copper, copper-zinc, lead-zinc, iron, molybdenum, uranium, potash and diamonds)
Natural resources are important for supporting the economy, and supporting the necessity of the citizens.
Good luck on your assignment!
I looked it but I was debating on C or D but I’m thinking it’s C because google was saying the National forest magages timber, wildlife, removing small trees. C says ecosystem which is the environment.
Answer:
(2 , 4)
Explanation:
use formula of reflection over y axis
formula is
(x , y ) = (-x , y)
(-2 , 4) = (2 , 4)
Answer:
B and C
Explanation:
B. In a given rock sample, the amount of Silicon-32 isotopes gets divided in half about every 170yrs.
This is the concept of half-life. Half life is the time take for half of a radioactive isotope to disintegrate. The shorter the half life the faster the isotope disintegrates.
From the question, we were told that it would take 170yrs for half of the isotope of Silicon to disintegrate to Phosphorus. This is the half life.
C. The half life can be used to determine the amount of Si-32 that has decayed from the time closure temperature was reached.
The closure temperature is very important in radioactivity. It is the temperature at which a system has cooled and there is no resulting disintegration of parent and daughter isotopes.
From first order kinetics, we know that the rate at which radioactive elements decay at any time is directly proportional to the number of radioactive atoms present. A knowledge of the half life helps to figure out the number of atoms that has decayed in time.
