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2 years ago

Using a named example, evaluate the effects of a large-scale irrigation scheme (6 marks)

Geography

1 answer:

Strike441 [17]2 years ago

7 0

Answer:

· Irrigation schemes are a necessity in many countries as they supply the countries with sufficient water to produce food to meet their increasing food demand (Fanadzo, 2012).In South Africa, the Vaalharts Irrigation Scheme (VHIS) is a large irrigation scheme utilising water from the Vaal River via numerous gravity fed canals ().The return flow from the VHIS enters the Harts River (via numerous ...

Explanation:

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How would you distinguish between rhyolite porphyry, andesite porphyry, and basalt porphyry

Mrac [35]

Basalt

Formation -basalt is (mineral) a hard igneous rock of varied mineral content formed when lava reaches the Earth's surface near an active volcano

Texture- is fine grained so the individual minerals are not visible

Colour- basalt being dark

Rhyolite

Formation -Rhyolite is a very fine-grained to glassy extrusive igneous rock. Formed in continental plates have volcanic eruptions.

 Texture- very small than grains and are difficult to observe without using a hand lens.

Colour- light in colour whether pink or grey

Andesite

Formation- Andesite is a fine-grained igneous rock that forms when the magma is rises up onto the surface and crystallized quickly

Texture- higher than basalt and lower than rhyolite

Colour -- color is pale due to silica content

7 0

2 years ago

What is the value of X6? Show the solution.

wariber [46]

Answer : The value of $x_6$ is $\sqrt{7}$ .

Explanation :

As we are given 6 right angled triangle in the given figure.

First we have to calculate the value of $x_1$ .

Using Pythagoras theorem in triangle 1 :

$(Hypotenuse)^2=(Perpendicular)^2+(Base)^2$

$(x_1)^2=(1)^2+(1)^2$

$x_1=\sqrt{(1)^2+(1)^2}$

$x_1=\sqrt{2}$

Now we have to calculate the value of $x_2$ .

Using Pythagoras theorem in triangle 2 :

$(Hypotenuse)^2=(Perpendicular)^2+(Base)^2$

$(x_2)^2=(1)^2+(X_1)^2$

$(x_2)^2=(1)^2+(\sqrt{2})^2$

$x_2=\sqrt{(1)^2+(\sqrt{2})^2}$

$x_2=\sqrt{3}$

Now we have to calculate the value of $x_3$ .

Using Pythagoras theorem in triangle 3 :

$(Hypotenuse)^2=(Perpendicular)^2+(Base)^2$

$(x_3)^2=(1)^2+(X_2)^2$

$(x_3)^2=(1)^2+(\sqrt{3})^2$

$x_3=\sqrt{(1)^2+(\sqrt{3})^2}$

$x_3=\sqrt{4}$

Now we have to calculate the value of $x_4$ .

Using Pythagoras theorem in triangle 4 :

$(Hypotenuse)^2=(Perpendicular)^2+(Base)^2$

$(x_4)^2=(1)^2+(X_3)^2$

$(x_4)^2=(1)^2+(\sqrt{4})^2$

$x_4=\sqrt{(1)^2+(\sqrt{4})^2}$

$x_4=\sqrt{5}$

Now we have to calculate the value of $x_5$ .

Using Pythagoras theorem in triangle 5 :

$(Hypotenuse)^2=(Perpendicular)^2+(Base)^2$

$(x_5)^2=(1)^2+(X_4)^2$

$(x_5)^2=(1)^2+(\sqrt{5})^2$

$x_5=\sqrt{(1)^2+(\sqrt{5})^2}$

$x_5=\sqrt{6}$

Now we have to calculate the value of $x_6$ .

Using Pythagoras theorem in triangle 6 :

$(Hypotenuse)^2=(Perpendicular)^2+(Base)^2$

$(x_6)^2=(1)^2+(X_5)^2$

$(x_6)^2=(1)^2+(\sqrt{6})^2$

$x_6=\sqrt{(1)^2+(\sqrt{6})^2}$

$x_6=\sqrt{7}$

Therefore, the value of $x_6$ is $\sqrt{7}$ .

5 0

2 years ago

Which of the following is the shortest interval of geologic time? an eon a period an era

trapecia [35]

An eon is a geologically around tens of millions of years. A period is a million year included in an eon which is also made up of several eras. Therefore my answer is a period due to it being a subset of an era which is a subset of an eon.

7 0

2 years ago

Read 2 more answers

According to the principle of self-determination, what is the only legitimate basis for the formation of a state? A. the nation

Lena [83]

The only legitimate basis for the formation of a state is the nation.

Explanation:

The formation of a state can be an easy or a very complicated process. Also, it can be done in a peaceful manner, or through usage of violence and military action. The states have been formed in many different ways over the course of the history. The principle of self-determination though states that the only legitimate basis for the formation of a state is the nation.

This principle seems good and legit, but in practice has turned out to be very problematic.
Numerous states have been formed without really having a nation, but more a mixture of different people and cultures stuffed together without even asking them for it.
There a re lot of nations around the world that do not have states, or rather are not allowed to have states, such as the Basques, Catalans, Kurdish etc.
Some states have been formed because of the interest of other states, like the example of Kosovo in the Balkans.

Learn more about state and nation https://brainly.in/question/2187717 #learnwithBrainly

3 0

3 years ago

Read 2 more answers

doctors are interested in seeing what type of arch support helps the most to alleviate foot pain. twenty five volunteers are ask

lara [203]

Answer:

five

Explanation:

the first week was randomly selected from the two types. which arch support is better

8 0

1 year ago