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vredina [299]
3 years ago
5

What has been the MOST significant cause of the decline in death rate in less developed countries?

Geography
1 answer:
DIA [1.3K]3 years ago
7 0

Answer:

a

Explanation:

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Why is Canada a key location for the study and monitoring of climate change?
Marrrta [24]

Answer:

measuring the loss of ice in the nunavut region around the arctic circle

Explanation:

it is the closest country greenland with it's many frozen islands in nunavut

4 0
3 years ago
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a rural kansas watershed that is ungauged has an area of 475 acres and a main channel length of 6870 feet with an average slope
dlinn [17]

Answer:

\mathbf{Q_p  =682 \ \  ft^3/s}

Explanation:

Given that:

Area = 475 acres

The length of the channel (L) = 6870 feet

The average water shield slope (S) = 100 feet/mile

Since; 1 mile = 5280 feet

Burst duration D = 15 min

∴

100 feet/mile = 100/5280

The average water shield slope (S) = 5/264

Using hydrograph method:

The time of concentration t_c = 0.0078L^{0.77} S^{-0.385}

where;

L = 6870

S = 5/264

t_c = 0.0078(6870)^{0.77} (\dfrac{5}{264})^{-0.385}

t_c =32.34 min

Since 60 min = 1 hour

32.34 min will be (32.34*1)/60

= 0.539 hour

Lag time T_l = 0.67\times t_c

T_l = 0.67\times 32.34

T_l = 21.6678\ min

The time to peak i.e

T_p = \dfrac{D}{2}+ T_L \\ \\  T_p = \dfrac{15}{2}+ 21.6678 \\ \\  T_p = 29.168 \ min

T_r = \dfrac{T_p}{5.5} \\ \\  T_r = \dfrac{29.1678}{5.5} \\ \\ T_r = 5.30 \ min

Since D = 15 min is not equal to T_r, then we hydrograph apart from T_r duration lag time.

Then;

T_p \ ' = T_p + \dfrac{D-t_r}{4} \\ \\ T_p \ ' = 29.168 + \dfrac{15-5.30}{4} \\ \\ T_p \ ' = 31.593

Now, we need to determine the peak discharge Q_p by using the formula:

Q_p  = \dfrac{484 \times A}{T_p \ '}

where

484 = peak factor

Recall that A = 475 acres, to miles, we have:

A = 0.7422 mile²

T_p \ ' = 31.593/60

∴

Q_p  = \dfrac{484 \times 0.7422}{\dfrac{31.593}{60}}

\mathbf{Q_p  =682 \ \  ft^3/s}

7 0
3 years ago
All of the following are examples of human-environment interactions except:
Trava [24]

Answer:

D. Precipitation

Explanation:

Human environment interactions are interactions between humans and the environment.

Let’s examine each answer choice.

A. Dams are barriers that are built to stop water. Humans build them, so it is a human environment interaction.

B. Farms are plots of land humans use to raise crops and animals. Therefore, they are human environment interactions.

C. Irrigation is a way to water crops. Humans build them. They are human environment interactions.

D. Precipitation is rain, snow, hail and more. Humans can’t control it, so it is not a human environment interaction.

Therefore, the best answer is D. Precipitation.

4 0
4 years ago
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Give a brief explanation about the origin of the earth​
sasho [114]

Answer: It was made from the stars and of debre

Explanation:

6 0
3 years ago
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When did the caste system evolve into a four tiered hierarchy
Digiron [165]
When the Aryans ruled over the region
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3 years ago
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