Answer:
Hey!
Your answer is A-LATITUDINAL LINES
Explanation:
Latitudinal lines run parallel to the equator...in other words, they run along the "width" of the Earth (EAST TO WEST)
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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.
Europe is composed of 50 SOVEREIGN or self-governing States.
The fact that US citizens have a high per capita income (per capita = per person) allows them to consume a disproportionately large amount of products compared to the rest of the world. So I think the answer is B.
Answer:
2000 Kilometers.
Explanation:
We multiply how much the plate moves per year (10cm) by how many years the plate has been moving.
10 × 20000000 = 200000000
Then we convert the centimeters to kilometers
200000000 ÷ 100000 = 2000
Hope this helped friend.
