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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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Marysya12 [62]

In 1998, Canada's highest court declared that Quebec could not legally secede.

Explanation:

Canada is the second largest country in the world. In order for the vast territory to be easier for governing, Canada is divided into provinces and territories. Such provinces and territories in Canada are:

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While most of the provinces and territories have nothing against being in the borders of Canada, there is one that opposes it, that being Quebec. Quebec is one of the provinces that contributes the most to the GDP of the country, is one of the most populous, and has an excellent location.

This province doesn't want to be in the borders of Canada though, but instead wants to be independent. The main reasons for that are that the majority of the people of Quebec have different ethnic and cultural background than the rest of the provinces and territories. While the people of Quebec already had several referendums about independence, with the majority of the population voting for it, the Canadian highest court declared any attempts for seceding of Quebec illegal in 1998.

Learn more about Canada brainly.com/question/11463017

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6 0
3 years ago
_____ cause earthquakes and volcanic activity at _____. Fault lines, laccoliths Plate tectonics, plate boundaries Plate tectonic
Juli2301 [7.4K]
The correct answer for the question that is being presented above is this one: "2.) Plate tectonics, plate boundaries ." Plate tectonics cause earthquakes and volcanic activity at plate boundaries.

Here are the following choices:
1.) Fault lines, laccoliths 
2.) Plate tectonics, plate boundaries 
3.) Plate tectonics, the Ring of Fire 
4.) Heat from Earth's mantle, fault lines
6 0
3 years ago
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SVEN [57.7K]

Answer:

I might be wrong but I think it is A. Serengeti Plain

Explanation:

8 0
3 years ago
What is the anwer for number 13 c
tester [92]
Try taking a clearer picture or just type question 13c because i don't know what it is.
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According to this map, in 2008 who controlled the Congolese city of
Kipish [7]

Answer:

D

Explanation:

4 0
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