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Aneli [31]
3 years ago
14

The isotope silicon 32 decays into phosphorus 32. Silicon 32 has a half-life of 170 years and can be used to find the age of roc

ks it is contained in. Which two statements are true regarding this scenario?

Geography
1 answer:
eduard3 years ago
5 0

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.

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Which examples describe the results of globalization? CHOOSE ALL THAT ARE CORRECT.
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The opinion may varies on this question, here are my point of views.

The correct answer would be:
A) spread of innovations
B) cultural blending
C) damage to some cultures

Let's look into them one by one:

A) spread of innovations

- As the technological skills on different areas spread to different countries, people are able to learn and create based on the new knowledge hence enhancing innovations across the world.

(- However,some might held a different opinion as the innovations are concentrated in powerful nations but not the third world countriedls. But what I believe is that under the spread of information, third world countries have chances for innovations as well therefore supporting this claim.)

B) cultural blending

- Under globalization, it is easier for people to travel around the world, bring their own culture and influence to a foreign place, resulting in the blend of culture. For example, you can see many international brands across the globe even in Asia, while you can find China town and production of Asia in places like Europe and America.

C) damage to some cultures

- This is also true. As globalization prevails, some cultures are considered less important as the living mode of people has changed. Languages for example, inder the influence of international language such as English, some minorities dialect are disappearing or the use is decreasing rapidly.

D) increase in death rate

- This is very unlikely to happen. As globalization brings the technology around, the medical advancements are also able to be brought to different place. For instance, the use of xray, or even cancer treatment, are spreaded. This has undoubtedly helped expanding the life span of people.

Therefore the correct answer would be:
A) spread of innovations
B) cultural blending
C) damage to some cultures

Hope it helps!
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