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2 years ago

What is the meaning of the phrase "demographic growth”?

Geography

2 answers:

zepelin [54]2 years ago

7 0

It’s how much the population goes up

allochka39001 [22]2 years ago

4 0

Answer:

Demographic growth is the variation of a population during the year, whether this be an increase or a decrease

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From the top of a building 42 feet high, the angle of depression to a car stopped on the ground it is 27°. What is the distance

Marrrta [24]

Answer:

$82.43\ \text{feet}$

Explanation:

Angle of depression = $27^{\circ}$

b = Height of building = 42 feet

$\theta=90-27=63^{\circ}$

p = Distance from the car to the base of the building

From the trigonometric identities we get

$\tan\theta=\dfrac{p}{b}\\\Rightarrow p=b\tan\theta\\\Rightarrow p=42\tan63^{\circ}\\\Rightarrow p=82.43\ \text{feet}$

The distance from the car to the base of the building is $82.43\ \text{feet}$ .

8 0

2 years ago

What are three differences between brittle and plastic strain (may include both characteristics of the strain as well as the con

stich3 [128]

Answer:

elastic deformation: the rock returns to its original shape when the stress is removed.

plastic deformation: the rock does not return to its original shape when the stress is removed.

fracture: the rock breaks.

Explanation:

Stress is the force applied to an object. In geology, stress is the force per unit area that is placed on a rock. Four types of stresses act on materials.

A deeply buried rock is pushed down by the weight of all the material above it. Since the rock cannot move, it cannot deform. This is called confining stress.

Compression squeezes rocks together, causing rocks to fold or fracture (break) (figure 1). Compression is the most common stress at convergent plate boundaries.

Rocks that are pulled apart are under tension. Rocks under tension lengthen or break apart. Tension is the major type of stress at divergent plate boundaries.

When forces are parallel but moving in opposite directions, the stress is called shear (figure 2). Shear stress is the most common stress at transform plate boundaries.

Stress In Earth’s Crust

Enormous slabs of lithosphere move unevenly over the planet’s spherical surface, resulting in earthquakes. This chapter deals with two types of geological activity that occur because of plate tectonics: mountain building and earthquakes. First, we will consider what can happen to rocks when they are exposed to stress.

5 0

2 years ago

MatroZZZ [7]

The length of the longest side of this triangle is given as 4 units.

<h3>How to solve for the longest side of the triangle.</h3>

The scale factor that we have in this question is 1/10

The longest side of the triangle can be gotten from the

scale factor x side

= 1/10 x 40

= 4 units

Hence the longest side of the triangle is 4 units.