Answer:
15 atoms
Explanation:
About 15 atoms out of the 120 Adams would remain.
<em>Generally, the half-life of a substance is the time it takes for one-half of that substance to disintegrate.</em>
Carbon 14 has a half-life of approximately 5,730 years. 17,190 years means that the sample had stayed for 17,190/5,730 which is equal to 3 carbon-14 half-lives.
Out of 120 Adams,
- <em>the first half-life will reduce 120 to 60 Adams</em>
- <em>the second half-life will reduce 60 Adams to 30 Adams</em>
- <em>the third half-life will reduce 30 Adams to 15 Adams.</em>
<em>Hence, at the end of the 17,190 years, approximately </em><em>15 Adams</em><em> would remain.</em>
Answer:
a) Protective effect on the health or incidence of disease (low-fat diet and colon cancer)
b) No association between exposure and incidence of disease for health (aerobic exercise and dental caries)
c) Positive association between the incidence of disease and the exposure (exposure to side-stream cigarette smoke and lung cancer)
d) Positive association between the incidence of disease and the exposure (infectious disease of the pelvis and ectopic (tubal) pregnancy).
Explanation:
The interpretation of OR can measure the association between the frequency of exposure and health in a sample that is considered statistically significant. When the OR is equal to 1, it means that there is no association between exposure and an incidence of health disease. When the OR is equal to 0.5, it means that the exposure has a protective effect on the incidence of the disease on health. And finally, when the OR is above to 1, it means that there is a positive association between the incidence of the disease and the exposure.
a) OR = +0.6. Since this value is less than 1 but greater than 0.5, it means that the exposure has a protective effect on the health or incidence of the disease.
b) OR = +1.0. As in this case, the OR value is equal to 1, meaning that there is no association between exposure and the incidence of disease for health.
c) OR = +1.3. As in this case the value is greater than 1, it means that there is a positive association between the incidence of the disease and the exposure.
d) OR = +3.0. There is a positive association between the incidence of the disease and the exposure. The OR 3 value means that the incidence of the disease and the health result will be three higher in people who are exposed.
Answer:
Human activities are causing imbalance of carbon based molecule.
Explanation:
It is the human intervention in the most unavoidable way that is affecting the environmental cycle and one of these cycle is the carbon cycle. Human activities such as burning of fossil fuels, excessive cutting of trees, rising green house effect, use of CFCs etc is hindering the environment process and hence causing imbalance on the earth.
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It is important to determine or know whether an organism is aerobic or anaerobic because from there you would be able to know the perfect conditions for the organism to grow and reproduce. If you are culturing the organism you would need if it needs oxygen and how much of oxygen is needed. Anaerobic organisms does not need the presence of oxygen in order to grow. You can determine an organism that is anaerobic by trying to put them in conditions that dos not have oxygen. After a few hours or days, when you observe that more organisms are present, then most likely it is an anaerobic organism.<span />
