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.
Answer: B
Can you mark me as brainleist?
Answer:
A,B,D
Explanation:
I believe that "B" is a possibly one; if not, then just A and D.
Also by examining other economy; you can learn from it, what people do and how they live their lives, same with listening to different music from there, because people listen to different music in different cultures as well.^^
Have a great day, and let me know if its correct or not, if so I will take down the answer or fix it if its wrong.
Answer:
Nuclear Fusion that takes place between hydrogen atoms.
Explanation:
The energy comes from the sun and the sun is mostly made up of hydrogen and helium atoms. The sun generates energy from nuclear fusion.
Hydrogen is being converted into helium in the core of the sun. This is called nuclear fusion.
Answer:
The health of many New Zealanders will be affected by a changing climate. ... Dangerous risks posed by more frequent and intense extreme weather events like flooding, storm surges, forest fires and ex-tropical cyclones are also likely to impact people's health.
