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alukav5142 [94]
3 years ago
13

Irrigation is a method used to water farm land. Identify two effects irrigation has on the water cycle and environment. A Irriga

tion can decrease the Earth's temperature, B. Irrigation can produce run-off that pollutes streams and rivers with fertilizers, C. Irrigation can cause erosion and take nutrients from the soil or D. Irrigation can increase global winds.
Please help and explain well because I really don't understand.
Chemistry
1 answer:
sergiy2304 [10]3 years ago
6 0

Answer:

A and C

Explanation:

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The average American is looking at their phone for 6.25 hours a day. How many hours will the average American spend on their pho
julia-pushkina [17]

Answer:

177253.125hrs

Explanation:

Given parameters:

  Number of hours spend per day on phone  = 6.25hrs

 Unknown:

Average hours pend by an average American if they lived for 77.7yrs

Solution:

Let us find the number of hours an average American spends on their phone per year;

    there are 365days in a year

 Number of hours  = 365 x 6.25  = 2,281.25hrs

Now, if they lived for 77.7yrs;

  They will spend  = 77.7 x 2,281.25 = 177253.125hrs

8 0
2 years ago
I NEED HELP ON THIS WORTH 20 POINTS :)
Arturiano [62]

Answer: C. mollusca and arthropoda

                                                                           

Explanation:

4 0
2 years ago
Read 2 more answers
Suppose you were to make a ring from a single strand of gold atoms. How many gold atoms would be required to make such a ring? H
Rudiy27
Let us assume that the ring is a size 7 ring, which has a circumference of 54.3 millimeters. Converting this to centimeters, the circumference of the ring is:

54.3 mm = 5.43 cm

Now, we determine the number of gold atoms that will be present in this:

5.43 / 1 x 10⁻⁹

There will be 5.43 x 10⁹ atoms


We now determine the number of moles this is by:

one mole = 6.02 x 10²³ atoms

Moles = 5.43 x 10⁹ / 6.02 x 10²³ 
Moles = 9.01 x 10⁻¹⁵ moles

The molar mass of gold is 197 g/mol

The mass is 9.01 x 10⁻¹⁵  * 197

The mass of the strand is 1.76 x 10⁻¹² grams
8 0
3 years ago
Read 2 more answers
A warm ocean transfers heat to the air above it. Which type of heat transfer is this
Zigmanuir [339]

Answer:

Conduction

Explanation:

Because When air is  in contact with the ocean it is at a different temperature than the seas surface

7 0
3 years ago
Read 2 more answers
Does this equation obey the law of conservation of mass: 2Z + 2HCI ➡️ ZnCI2 + H2​
MAXImum [283]

Answer:

2Zn + 2HCI ➡️ ZnCI2 + H2​

LHS of equation

Z = 2

H = 2

Cl = 2

RHS of equation

Zn = 1

Cl =2

H =2

as Zn is not equal in number of atoms on both sides of the equation, the equation does not obey the law of conservation of mass

Explanation:

the law of conservation mass states that the mass of an isolated system cannot be created nor destroyed by any chemical reaction or physical transformation. thus, there must be an equal number of atoms of an element present on both sides of the equation.

5 0
3 years ago
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