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>
Committing Suicide
Patient who are recommended psychoanalysis are those with critical life problems that tend to make them highly anxious and depressed. The psychoanalysis involves delving into their experiences including childhood experiences. Giving insight into the unconscious mind making the patient conscious of its thoughts is the essence.
The correct answer for the question that is being presented above is this one: "(3) nucleus and ribosome." The two cell structured work together in the process of protein synthesis are the nucleus and ribosome.
Here are the following choices:
(1) nucleus and chloroplast
(2) ribosome and vacuole
(3) nucleus and ribosome
(4) mitochondrion and cell membrane
Answer:
b
Explanation:
The legend of King Arthur is well-known in literature. Based on Unsolved Mysteries of History, there is little to suggest it is true. Do you think it is important for people to believe in legends like King Arthur even if there is little evidence to support them? Why or why not? Write a short (3 paragraphs) explanatory essay stating your opinion. Justify your opinion and conclusions with relevant textual evidence (quotes or paraphrased ideas from sources) and background knowledge. Remember to use relevant vocabulary from the text in your essay.