Answer:
d Divergent plate boundary
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>
The answer is muscle weakness, fatigue and dysrhythmias. The distinctive indication of hypokalemia contains muscle faintness, leg spasms, fatigue, paresthesia and dysrhythmias. Indicators of hypercalcemia contain nausea, vomiting, constipation, bone pain, too much urination, dehydration, misperception, weariness and indistinct speech. Reduced cognitive capability and hypertension may outcome from hyperchloremia in which constipation is a indication of hypercalcemia.