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Iteru [2.4K]
2 years ago
13

B. Urbanization increases/decreases (highlight one) the lag time between rainfall and peak stream flow. (1 pt)

Geography
1 answer:
inessss [21]2 years ago
4 0

Answer:

explained below.

Explanation:

b) Urbanization decreases  the lag time because the  loss of the rainfall decrease as the water absorbed by the ground decreases and water reaches to the river very quickly.

c) In urbanization the runoff occurs for small period of time because there is no hindrance in the flow of the rainfall so the runoff reaches very quickly to the water body.

d) Intense rainfall in urban area often experience the flash flood condition because there no absorption of water by the ground, trees are less so which does not lead to perception of water by leaves of the tree hence all the rainfall is basically converted into runoff and city does not have system to act on the situation which lead to flash flood condition.  

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Answer:

The age of the rock = 2800.6 million years = 2.8 billion years.

A simple method of analysis similar to Carbon dating is used to obtain the required age of the rock. Radioactive substances decay according to first order reaction kinetics. So, plugging all the required parameters into the general equation for amount of substance left in a first order decay gives us the age of the rock.

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Half life of Uranium-235 = 700 million years (from literature)

The decay of radioactive substances follow first order reaction kinetics.

The general equation is given as

A(t) = A₀ e⁻ᵏᵗ

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k = decay constant

The decay constant is related to the half life (T) through the relation,

k = (In 2)/T

k = (0.693/700) = 0.00099 /million years

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6.25 = 100 e⁻ᵏᵗ

0.0625 = e⁻ᵏᵗ

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Hope this Helps!!!

7 0
3 years ago
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