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Sergeeva-Olga [200]
3 years ago
6

Look at the photo !!!

Biology
2 answers:
kvv77 [185]3 years ago
6 0

Answer: D (Or the last one)

Explanation:

One example can be when water hits iron, it usually turns to rust, it's changing it's properties or substance for that object.

Georgia [21]3 years ago
5 0

Answer:

When a substance changes into a new substance

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What do you mean by pneumunoultramicroscopicvolconoconiosis?​
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using a long word dont make u look smart

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3 years ago
Read 2 more answers
The half-life of silicon-32 is 710 years. If 70 grams is present now, how much will be present in 200 years? (Round your answer
elena-s [515]

Answer:

57.7 grams

Explanation:

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Half life of the silicon-32 = 710 years

Half life means the time period required by a radioactive element to reduce its mass by half.

Radioactive decay formula is

A = A_o*2^{\frac{-t}{h} }

Where

A represents the amount of radioactive element after time t years

A_0 represents the initial amount of radioactive element

t = time of decay

h = half-life of the substance

Substituting the given values in above equation, we get -

A = 70 * 2^{\frac{200}{710} \\

A = 57.7 grams

6 0
4 years ago
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