D. helps prevent flooding
E. helps to filter contaminants out of the water
Explanation:
Biodiversity refers to the variety of life forms in a particular area. It suggests that different forms of plants and animals can be found in particular place at any point in time.
The tropical rain forest regions of the world are known to be the most biodiverse .
- Biodiversity does not help to prevent flooding. Flooding is the inundation of water in a particular area. There is no correlation between flooding and biodiversity.
- It is not biodiversity that helps to filter contaminants out of water. Special sands such as diatomite are used for this purpose.
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Half life formula
The number of unstable nuclei remaining after time t can be determined according to this equation:
N(t) = N(0) * 0.5^(t/T)
where:
N(t) is the remaining quantity of a substance after time t has elapsed.
N(0) is the initial quantity of this substance.
T is the half-life.
It is also possible to determine the remaining quantity of a substance using a few other parameters:
N(t) = N(0) * e^(-t/τ)
N(t) = N(0) * e^(-λt)
τ is the mean lifetime - the average amount of time a nucleus remains intact.
λ is the decay constant (rate of decay).
All three of the parameters characterizing a substance's radioactivity are related in the following way:
T = ln(2)/λ = ln(2)*τ
How to calculate the half life
Determine the initial amount of a substance. For example, N(0) = 2.5 kg.
Determine the final amount of a substance - for instance, N(t) = 2.1 kg.
Measure how long it took for that amount of material to decay. In our experiment, we observed that it took 5 minutes.
Input these values into our half life calculator. It will compute a result for you instantaneously - in this case, the half life is equal to 19.88 minutes.
If you are not certain that our calculator returned the correct result, you can always check it using the half life formula.
<span>OSMOSIS IS AN EXAMPLE OF FACILITATED DIFFUSION. Osmosis involves the movement of solutes in a solution across the concentration gradient, from the region of lower concentration to the region of higher concentration. Facilitated diffusion does not need energy to occur while active transport requires energy to occur.</span>
The endocrine system is composed of glands that engender and secrete hormones, chemical substances engendered in the body that regulate the activity of cells or organs. These hormones regulate the body's magnification, metabolism (the physical and chemical processes of the body), and sexual development and function.