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Yanka [14]
3 years ago
9

Which of the following statements is true? Hydroelectric power plants do not impact the environment.

Chemistry
2 answers:
Andrej [43]3 years ago
7 0
Most of the world's population lives in industrial areas.
Maru [420]3 years ago
5 0

Answer:

Fossil fuels take millons of years to form

Explanation:

Fossil fuels are organic compounds derived from carbon. They come from the slow decomposition of the organic matter that inhabited the planet millions of years ago, such as animals and plants.

This process takes millions of years, and that is why they are cataloged as non-renewable fuels.

The other answers are incorrect because hydroelectric plants generally produce noise, which is cataloged as a negative environmental impact.

It cannot be assured that the majority of the world's population lives in industrial areas. And finally, the production of electricity in the U.S. cannot have remained constant since 1940 due to the constant growth of its population.

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padilas [110]

Answer: a

Explanation: a

8 0
2 years ago
A standard backpack is approximately 30cm x 30cm x 40cm. Suppose you find a hoard of pure gold while treasure hunting in the wil
Blizzard [7]

Explanation:

The dimensions of a standard backpack is 30cm x 30cm x 40cm

The mass of an average student is 70 kg

We know that, the density of gold is 19.3 g/cm³.

Let m be the mass of the backpack. So,

\text{density}=\dfrac{\text{mass}}{\text{volume}}\\\\m=d\times V\\\\m=19.3\ g/cm^3\times (30\times 30\times 40)\ cm^3\\\\m=694800\ g\\\\\text{or}\\\\m=694.8\ kg\approx 700\ kg

An average student has a mass of 70 kg. If we compare the mass of student and mass of backpack, we find that the backpack is 10 times of the mass of the student.

8 0
3 years ago
How much space does a 246g box take up. Its density is listed at 3.2 g/cm3.
CaHeK987 [17]

Answer:

76.875 cm3

<h2>Explanation:</h2>

Since: Density = \frac{Mass}{volume\\}

Then: Volume = \frac{Mass}{Density\\}

The mass of the box = 246g

and the density = 3.2 g/cm3

Then: The volume = \frac{246}{3.2}

= 76.875 cm3

4 0
3 years ago
What is the molarity of a solution made by dissolving 20.0 g of H3PO4 in 50.0 mL of solution
Rom4ik [11]
(20*1000)÷(molecular weight of H3po4*50)

8 0
3 years ago
Why did Cyrus Field want to build a transatlantic telegraph?
Paul [167]

In 1854, Cyrus West Field conceived the idea of the telegraph cable and secured a charter to lay a well-insulated line across the floor of the Atlantic Ocean. Obtaining the aid of British and American naval ships, he made four unsuccessful attempts, beginning in 1857.

5 0
2 years ago
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