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3 years ago

Less expensive and cleaner than power plants that use fossil fuels, why are they not used on a larger scale?

2 answers:

4 0

Another cleaner and less expensive forms of energy (not fossil fuel) are not used on a larger scale because of many reasons. Society is accustomed to burning fossil fuels. To change to another better form of energy would be a huge shift in the way factories, car and our electricity are powered. Also, many fossil fuel companies do not want to be out of business so they attempt to bribe politicians and other public figures to spread false information that climate change is fake so the can continue to earn money disregarding the horrible effects it will have on the planet.

guajiro [1.7K]3 years ago

3 0

If your talking about solar power its because its just not practical solar power doesnt put out nearly enough power for us to be able to run widespread as of yet new and more efficient solar power inc

You might be interested in

What is the surface area of the figure shown? (use 3.14 for pi)

SpyIntel [72]

This is a combination of the formula of several figures.

The first one is the bottom of the cylinder AKA a circle.
The second one is the cylinder - the bottom and the top.
The third one is a cone without a bottom.

The first one can be written like this: r^2*3.14 where r is the radius of the circle
The second one is written like this: 2*3.14*r*h where r is the radius, and h the height
The third one is written like this: l*r*3.14

After this you just have to input the values.
bottom cylinder Cone (Use calculator if possible)
(3^2*3.14)+(2*3.14*3*5)+(6*3*3.14)=
28.26 + 94.2 + 56.52 = 178.98 in^2

The correct answer is 178.98 in^2.
Youre welcome.

EXTRA:

If youre wondering how to find the different formulas, you can search for the full formula, then remove the parts you do not need, by matching them with the formula of the part you want to remove.

Example:
Cylinder:
SA = 2(pi r 2) + (2 pi r)* h
In this case, i didnt need the top and bottom, then i look for the formula of a circle.
Circle SA = pi r^2

Is this anywhere in the cylinder? Yes! The first part.
Then we are left with:
2 + (2 pi r)*h
But that 2 looks strangely placed, and with some reason, one quickly understands that it means "top AND bottom", but since we removed the circle surface, we have to remove that part too.
So the final result of the formula is:
2 pi r h

4 0

3 years ago

Find the area of the region between a regular hexagon with sides of 6" and its inscribed circle.

kirza4 [7]

Answer:

Area of the region = 15.03 in²

Step-by-step explanation:

Area of region between a regular hexagon with sides 6" and circle inscribed.

So Area of region = Area of regular hexagon - area of circle

Now area of regular hexagon = $\frac{3a^{2} \sqrt{3}}{2}$

where a = side of the hexagon = 6"

Now area of regular hexagon = $\frac{3(6^{2})\sqrt{3}}{2}=\frac{108\sqrt{3}}{2}$ = 93.53 square in.

Area of circle inscribed = πr²

Here r is the radius of the circle = $\sqrt{6^{2}-3^{2}}=\sqrt{36-9}$

r = 5"

So area of the inscribed circle = π(5)² = 3.14(25) = 78.5 square in.

Now area of region = 93.53 - 78.5 = 15.03 in²

5 0

3 years ago

Please help calculate the total surface area. Thanks

Gnoma [55]

Answer: 70cm³

EXPLANATION:

1/2 x base x height x 2 (this is to find the surface area of one of the triangular faces since the other side of the triangular shape has the same measurements you should multiply it by 2 straight away since it makes it easier for you)

1/2 x base x height x 2

1/2 x 3 x 3 x 2 ← (to get the height of the triangle substract 7 from 10)

1/2 x 18 ← (multiply 3x3x2=18)

9cm³ ←(since 18 is 2x9 your answer is 9cm³)

1/2 x base x height x 2 (this is to find the surface area of the other triangular face with different measurements and since the other side of the triangular shape has the same measurements you should multiply it by 2 straight away since it makes it easier for you)

1/2 x base x height x 2

1/2 x 4 x 3 x 2 ← (to get the height of the triangle substract 7 from 10)

1/2 x 24 ← (multiply 4x3x2=24)

12cm³ ←(since 24 is 2x12 so your answer is 12cm³)

Then next you have to find the surface area of one face of the rectangle and multiply it by 2 since the back side of the rectangle has the exact same measurements. The formula to find the area of a rectangle is area= length x breath

A= 3x7= 21cm³

then find the area of the other rectangular face with different measurements and multiply it by 2 since the back side of the rectangle has the exact same measurements. The formula to find the area of a rectangle is area= length x breath

A= 4x7= 28cm³

FINALLY

add all the areas of the faces you have found and you'll get the total surface area!

9+12+21+28=70cm³

Thank you! I hope you understood something and I hope you have a great day! good luck!

3 0

2 years ago

What is 149 times 5. solve and estimate

GenaCL600 [577]

The answer to this problem is 745.

149 * 5 = 745

In the future, you can do this with a calculator.

6 0

3 years ago