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Amiraneli [1.4K]
3 years ago
5

Desertification is a process whereby land degradation in arid, semi-arid, and dry sub humid areas results from climatic variatio

ns and human activites.
A. True
B. False
Physics
1 answer:
Viefleur [7K]3 years ago
3 0

Answer:

TRUE

Explanation:

Desertification is usually defined as the process by which a productive land is transformed into a desert. This process occurs mainly in the arid, semi-arid as well as in the dry sub-humid areas, where there occurs less amount of rainfall and presence of less or no moisture content in the air.

It is caused by various processes, such as-

  • Cutting down of trees, in order to make urban areas.
  • Lack of rainfall.
  • Overgrazing of animals.
  • Low level of groundwater.
  • Forest-fire can also lead to desertification, as the trees are burned by this process.
  • Soil erosion also is a major cause.
  • It also occurs due to changes that occur in the climate of the area.

Thus, the above-given statement is true.

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In some cases, neither of the two equations in the system will contain a variable with a coefficient of 1, so we must take a fur
levacccp [35]

Answer:

Explanation:

Given the simultaneous equation,

3C+4D=5  .............. 1

2C+5D=2 ............... 2

Solving for the value of C and D using substitution method.

From equation 1;

3C = 5-4D

Divide both sides by 3

3C/3 =  (5-4D)/3

C = (5-4D)/3 .... 3

From equation 2:

2C+5D=2

5D = 2-2C

Divide both sides by 5;

5D/5 = 2-2C/5

D = (2-2C)/5 ..... 4

Substitute equation 4 into 3;

C = 5-4{(2-2C)/5}/3

C = [5 - (8-8C/5)]/3

C = [25-(8-8C)/5]/3

C = (17+8C)/15

15C = 17+8C

15C-8C = 17

7C = 17

C = 17/7

Substitute C = 17/7 into equation 4 to get the value of D

D = (2-2(17/7))/5

D = (2-34/7)/5

D = 14-34/35

D = -20/35

D = -4/7

<em>Hence the value of C = 17/7, D = -4/7</em>

6 0
4 years ago
Suppose you lift a 300N object 5m from the floor. How much work did you do on the<br> object?
Mandarinka [93]

Answer:

W= 1500J

Explanation:

<u>Formula:</u> W=f*d

<em>What are your values?</em>

W- ?

F- 300N

D- 5m

<em>Plug in the values.</em>

W= (300N)(5m)

W= 1500J

hope this helps!!

3 0
3 years ago
A person is standing on a level floor. His head, upper
BabaBlast [244]

Answer:

y_{cg} = 1.03 m

Explanation:

Given data:

weigh (head+arms + head) w_1 = 438 N

centre of gravity y_1= 1.28 m

weigh (upper leg) w_2 = 144 N

Center of gravity y_2 = 0.760 m

weigh ( lower leg + feet) = 87 N

centre of gravity = y_3 = 0.250 m

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y_{cg} = \frac{438 \times 1.28 + 144\times 0.760 + 87 \times 0.250}{438+144+87}

y_{cg} = 1.03 m

8 0
4 years ago
The product of force and the amount of time the force acts on an object is called:
maxonik [38]
That's the "impulse" applied to the object.  It's exactly equal to
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allochka39001 [22]
I don't see the article but i personally know that

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7 0
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