After the 1st half-life 250 g of the radioactive material will be left.
<span>After the 2nd half-life 125 g of the radioactive material will be left. </span>
<span>After the 3rd half-life 62.5 g of the radioactive material will be left. </span>
<span>Therefore after 60 minutes, 3 half lives would have occurred. </span>
<span>Therefore the half-life = 60 / 3 = 20 minutes when 250 grams of the original material would have remained radioactive. </span>
<span>Therefore the answer is A) About 250 gram of the material decayed in 20 minutes.</span>
Answer:
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Explanation:
The main parts of the immune system are: white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus, and the bone marrow.
<span>His name was mice. so thats the answer if you were looking for that.</span>
Answer:
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Explanation:
In a perfect world, I would split the land 50/50. Natural resources are important, and yes, if we would like a future on this planet, we should strive to find alternatives, but in the meantime, splitting it is the smartest thing to do. I would also suggest to make it mandatory to replant all the trees lost in a connecting area if possible.
Tell your parents and report it to the police.
