Note: there are no \"cookbook\" answers to the following questions. You have to

Question

Note: there are no "cookbook" answers to the following questions. You have to think about things.

1- You are a brown trout living in a high alpine lake in Colorado. You have a cousin (a rainbow) living in a farm pond next to the Department of Energy's Hanford Site. Describe why your annual radiation doses might differ?

2- Describe why they might be the same.

3- A human baby and an adult both drink milk containing 131I; both drink 1 L d-1. Which would you expect to have the higher concentration of 131I in their thyroid? Why?

4- 3H is detectable in the environment. Where did it come from?

5- An elephant and an amoeba both went for a swim in a pond contaminated with 137 Neither of them drank the water. Which would you expect to have the highest concentration of the contaminant? Why?

6- A mule deer is consuming vegetation from a contaminated pasture. The vegetation has an average activity concentration of 1 Bq g-1 of 137 Assuming the deer eats 1.5 kg d-1 and that the effective half-time for 137Cs in the deer is 500 days.   What equation would you use to calculate the activity in the "deer" compartment with time? Generate a plot (using excel or by hand) and submit it with your answer.?

Explanation / Answer

1. why annual doses might differ?

answer; when radioactive pollution from hanfords plutonium seperations with plants it effects dry weather . the stability of the surrounding air, the wind speed and direction and weather it is raining or snowing . under different conditions especially under unstable condition pollution diffuses relatively rapidly . wind speed and direction ,the direction of the wind directs the where pollution is carried . . the dose reconstriction is done based on the creation of the radio active hot spots such as iodine 131 the iodine has the half life of only 8days the half of the amount odf decay by releasing the active particles or waves ,creation of these hotspots will make the annual doses of the radiation it differ .

2. Describe why they might be the same.

because the half life of the radioactive substace is the same , the radio active particles are released into air as the waves and to lose its half of its activity , this causes the formation of radioactive hotspots .

3.Which would you expect to have the higher concentration of 131I in their thyroid? Why?

answer ; iodine is a radioactive substance ,it has radio active half life of 8 days . when iodine 131 is present in high levels in the envinorment it is absorbed into the food meaterial and also accumulate in the thyriod gland , as it decays it causes the damage to the thyriod gland , so the radioacitve iodine willbe in higher amount in the thyriod .

4. 3H is detectable in the environment. Where did it come from?

the high amounts of the 3H can be detectable at significant distance away from this point . it is present in the surface sediments , the levels of the 3h in the marsh surfaces suggest that there will be limited penetration of H3. the 3H came from the radiocative exposure from the trtium .

5. Ameoba will have the higher concentration of the 137 as it absobs water faster through the contarctile vacoule through the process of the osmosis .

6. i dont know the answer

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