## which sustainable practice is paired correctly with its impact on the environment?

Creating more wind farms results in a reduction of fossil fuel use is the most sustainable practice as a correct pair, alongside with its impact on the environment. A fossil-fuel power station uses fossil fuels. Coal is a typical examples. Wind farms also produce energy and this is a cleaner source of energy because it does not produce any pollution.

Setting irrigation systems to run longer results in a reduction of water use is an example of a correct pairing of a sustainable practice and its impact to the environment. The irrigation system is one of the techniques used in agriculture to maximize the use of the water and extend the span of its usage over time.

## an object is 1.0 cm tall and its inverted image is 5.0 cm tall. what is the exact magnification?

The magnification is the ratio of the image size to the object size will be m=-4

### What is magnification?

Magnification of the lens is defined as the ratio of the size of image to the size of object. It is also defined as the ratio of the distance of image to the distance of the object from the lens.

Mathematically it is defined as: = Size of the image = Size of object = Distance of the image = Distance of the image

It is given in the question

Size of image = 4 cm

Size of the object = 1 cm

Since the image is inverted to magnification will be given by

Thus the magnification of the inverted image will be M=-4

To know more about magnification follow

-4.0 (negative since the image is inverted)

## in parallelogram pqsr what is pq

one of the rules for a parallelogram is that opposite sides are congruent.
so…all you need to do is set up the equation which is 2x + 5 = 4x + 1
move 2x to other side (meaning subtract 2x from both sides) to get 5 = 2x + 1
move 1 to other side to get 4 = 2x
divide both sides by 2 to get 2 = x
now all you need to do is plug it in the equation for PQ which is 2(2) + 5 to get 9

The value of side PQ of the given parallelogram is; PQ = 9

### Parallelogram Properties

In parallelograms, we know that they usually have 4 sides. However 2 of the parallel sides are equal.

Thus, from the given parallelogram PQSR, we can say that;

PQ = RS

Thus;

2x + 5 = 4x + 1

Rearranging gives us;

4x – 2x = 5 – 1

2x = 4

x = 4/2

x = 2

Thus; PQ = (2x + 5) = 2(2) + 5 = 9

## which are the solutions of x2 = –7x – 8?

You can start by rewriting the equation so that the right side equals zero. Add

and

to both sides.

You can now use the quadratic equation (below), where

and

, to find solutions. Plug in these values for

and

into the equation and simplify.

The final answer is the combination of both solutions.

Or approximately… x^2 = -7x -8x^2 +7x +8 = 0D = 49 -32 = 17x_1,2 = (-7+/-sqrt17)/2 = (-7-sqrt17)/2 and (-7+sqrt17)/2hope this will help you

## which missing item would complete this alpha decay reaction?

From the question,

Fermium which atomic mass of 257 decay through alpha to 253 Cf

The reaction is stated below.

257Fm –> 253Cf…+ 4He

100 98 2

Therefore,

253Cf —> 253Es + e-

98 . 99

### What is Alpha decay?

Alpha decay is a form of radioactive decay that occur in the nucleus of an atom and the atomic nucleus emits an alpha particle which them decays into another atomic nucleus, with different mass number that is reduced by four.

Therefore, the completed part is

253Cf —> 253Es + e-

98 . 99

This is alpha decay not beta decay.

Fermium 257 decays by ALPHA decay into 253 Cf which has an atomic number of 98

257Fm –> 253Cf…+ 4He
100…………….98………2

Interestingly Californium does undergo beta decay.

253Cf —> 253Es + e-
98……………99

Hope this helps.

## determine the empirical formula for a compound that is 36.86% n and 63.14% o by mass.

The empirical formula for a compound that is 36.86% N and 63.14% O by mass is N2O3.

### HOW TO CALCULATE EMPIRICAL FORMULA?

The empirical formula of a compound can be calculated as follows:

• N = 36.86% = 36.86g
• O = 63.14% = 63.14g

First, we divide each value by its molar mass as follows:

• N = 36.86g ÷ 14g/mol = 2.63mol
• O = 63.14g ÷ 16g/mol = 3.95mol

Next, we divide by the smallest mole value;

• N = 2.63mol = 2.63 = 1
• O = 3.95mol ÷ 2.63 = 1.5

We multiply each value by 2 to get an approximate whole number ratio i.e. N = 2, O = 3

Therefore, the empirical formula of for a compound that is 36.86% N and 63.14% O by mass is N2O3.

Mass of nitrogen = 14.0067
Mass of oxygen = 15.9994
In this compound nitrogen = 36.86 / 14.0067 = 2.63
And oxygen = 63.14 / 15.9994 = 3.95
now we have: N—– 2.63 and O—-3.95
by dividing both with the smallest number we get
N——-2.63/2.63 = 1
O——-3.95/2.63 = 1.5
To get whole numbers we multiply both by 2
N= 1 x 2 = 2 And O = 1.5 x 2= 3
So, the empirical formula is N₂O₃.

This is absolutely true! Having more add-ons and toolbars means that your processor is going to be working much harder to function it all, while also trying to handle everything else it is getting. If you have to many add-ons/toolbars, it is going to be a constant fight on the IRQ and with a lower-end PC, your RAM may even fill up and crash your computer.

To put it simple, only add the toolbars and add-ons you need, and don’t add several extras.

## the study and analysis of light according to its component wavelengths is called

The study and analysis of light according to its component wavelengths is called spectroscopy.

EXPLANATION:

Spectroscopy is the branch of science  that is concerned with the investigation and measurement of spectrum produced when matter interacts with or emits electromagnetic radiation.It helps us to identify atoms and molecules in the object.Spectroscopy is used to find out Dopplers effect (the red shift and blue shift),which tells how fast the object is comming towards earth or moving away from the earth.

## 50+50-25×0+2+2

The correct answer using BODMAS for the evaluation of the question given is 104

We need to implement the concept of BODMAS on other to solve :

50 + 50 – 25 X 0 +2 +2

We perform the multiplication operation first :

-25 × 0 = 0

50 + 50 = 100

2 + 2 = 4

Hence,

50 + 50 – 25 X 0 +2 +2 = 100 + 0 + 4 = 104

Hence, the correct answer is 104

Step-by-step explanation:

Using BODMAS  rule we can find the answer

Each letter in the BOMAS indicate,

B – Bracket

O – of

D – Division

M – Multiplication

S – Subtraction

To solve the problem

The given problem is,  50 + 50 – 25 X 0 +2 +2

Using BODMAS rule we can write,

50 + 50 – 25 X 0 +2 +2 =  50 + 50 – 0 +2 +2

= 104

## in the diagram of circle o, what is the measure of abc

Given:

Given that a circle O with two tangents BA and BC.

The major arc AC is 234°

The minor arc AC is 126°

We need to determine the measure of ∠ABC

Measure of ∠ABC:

We know the property that, “if a tangent and a secant, two tangents or two secants intersect in the interior of the circle, then the measure of angle formed is one half the difference of the measures of the intercepted arcs.”

Hence, applying the above property, we have;

Substituting the values, we get;

Thus, the measure of ∠ABC is 54°

Hence, Option b is the correct answer.