All categories

3 years ago

Which of the following human activities can increase the risks of flooding?

Chemistry

2 answers:

adelina 88 [10]3 years ago

7 0

deforestation i hope this helps

yaroslaw [1]3 years ago

6 0

Answer:

Deforestation and Cultivation

Explanation:

First I am going to give the definition of deforestation:

Deforestation is basically the removal of trees.

The removal of trees leaves leaves very little vegetative cover to hold heavy rain fall. This is why mudslides and things happen. When the land is clear and flat, the water keeps on going instead of going into the soil. That water that keeps on going is called runoff water. If we planted trees by the rivers, that could take down the height of the floods in towns by 20%

At first I was going to say widening rivers, but that is a way to manage river water. When we lengthen the river, it is so that the water can take more time to reach the river canal.

Definition of Cultivation: The production of food by preparing the land to grow crops (especially on a large scale) animal husbandry - breeding and caring for farm animals. agriculture, tree farming - the cultivation of tree for the production of timber.

I was also going to say Cultivation. Over-cultivation is the excessive use of farmland to the point where productivity falls due to soil exhaustion or land degradation. Now this is actually why we have floods in the USA. The soil cannot soak up any water, therefore the water over flows and that is when a flood starts to happen.

I know this took some time but hope I could help :)

You might be interested in

state whether the following changes are physical or chemical for rancidipication fixation of water 2 tearing of paper 3 rusting

Artist 52 [7]

1. rancidification fixation of water is CHEMICAL CHANGE

2. Tearing of paper is PHYSICAL CHANGE

3. Rusting if iron is CHEMICAL CHANGE

4. Electrolysis of water is CHEMICAL CHANGE

5 0

3 years ago

Substances like neon , which is a gas at room temperature and pressure, can often be liquified or solidified only at very low te

marshall27 [118]

Answer:

Condenses at 27.25K.

Freezes at 24.65K.

Explanation:

In order to solve this above question, there is is need to make use of the following equation. The main idea here is to convert degree celsius to Kelvin. Hence,

0°C + 273.15 = 273.15K---------------------(1).

Therefore, we will make use of the above equation (1) and slot in the values for at degree celsius at which it condenses and at degree celsius at which it freezes.

So, we have at temperature at which it condenses:

-245.9°C + 273.15 = 27.25K.

Also, we have at temperature at which it freezes.

-248.5°C + 273.15 = 24.65K.

8 0

2 years ago

Copper crystallizes in a face-centered cubic unit cell. the density of copper is 8.94 g/cm3. calculate the length of the edge of

Ilia_Sergeevich [38]

361.4 pm is the length of the edge of the unit cell. First, let's calculate the average volume each atom is taking. Start with calculating how many moles of copper we have in a cubic centimeter by looking up the atomic weight. Atomic weight copper = 63.546 Now divide the mass by the atomic weight, getting 8.94 g / 63.546 g/mol = 0.140685488 mol And multiply by Avogadro's number to get the number of atoms: 0.140685488 * 6.022140857x10^23 = 8.472278233x10^22 Now examine the face-centered cubic unit cell to see how many atoms worth of space it consumes. There is 1 atom at each of the 8 corners and each of those atoms is shared between 8 unit cells for for a space consumption of 8/8 = 1 atom. And there are 6 faces, each with an atom in the center, each of which is shared between 2 unit cells for a space consumption of 6/2 = 3 atoms. So each unit cell consumes as much space as 4 atoms. Let's divide the number of atoms in that cubic centimeter by 4 to determine the number of unit cells in that volume. 8.472278233x10^22 / 4 = 2.118069558x10^22 Now calculate the volume each unit cell occupies. 1 cm^3 / 2.118069558x10^22 = 4.721280262x10^-23 cm^3 Let's get the cube root to get the length of an edge. (4.721280262x10^-23 cm^3)^(1/3) = 3.61426x10^-08 cm Now let's convert from cm to pm. 3.61426x10^-08 cm / 100 cm/m * 1x10^12 pm/m = 361.4 pm Doing an independent search for the Crystallographic Features of Copper, I see that the Lattice Parameter for copper at at 293 K is 3.6147 x 10^-10 m which is in very close agreement with the calculated amount above. And since metals expand and contract with heat and cold, I assume the slight difference in values is due to the density figure given being determined at a temperature lower than 293 K.

4 0

3 years ago

How many phosphorus atoms are present ?

Law Incorporation [45]

Answer:

The answer is option 2.

Explanation:

(PO4)2 = P2O8

Therefore, there are 2 Phosphorus atoms present .

3 0

3 years ago

How are seeds beneficial to humans or the environment give me a good Reason!!

I am Lyosha [343]

Answer:Seeds are great sources of fiber. They also contain healthy monounsaturated fats, polyunsaturated fats and many important vitamins, minerals and antioxidants. When consumed as part of a healthy diet, seeds can help reduce blood sugar, cholesterol and blood pressure

Explanation:

5 0

2 years ago

Read 2 more answers