Answer:
Global warming is caused by the greenhouse effect caused by greenhouse gases, such as carbon dioxide, in the earth's lower atmosphere. A release of carbon dioxide into the atmosphere by carbon sources such as fossil fuel burning increases the greenhouse effect hence increased global warming. Another effect of higher carbon dioxide levels in the atmosphere is oceans acidification. The oceans will absorb more carbon dioxide and form more carbon acid hence lowering the pH of the waters. To alleviate this phenomenon, carbon sinks need to be protected such as forest because they sequester carbon dioxide from the atmosphere and store it as carbohydrates in their biomass.
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Yes your answer to this question is B. So you are correct.
Answer: they both suggest that snakes evolved from an ancestor with legs
Explanation:
Answer:
-5 5/6
Explanation:
So the same thing as the last question I answered, we have to multiply the top row and the bottom row. However, the fractions in the photo are actually mixed numbers so we first have to make them into improper fractions.
1 and 2/3 would be: 5/3
-3 and 1/2 would be: - 7/2
So now we have to multiply them: 5/3 * - 7/2:
Same steps: 5 * 7 = 35; 3 * 2 = 6:
- 35/6, or we could simplify and make it a mixed number so and also add the negative sign:
6 goes into 35 5 times so: -5 and 5/6 or -5 5/6
Answer:
Answer is option A.
reservoir - penstock - turbine - generator - transformer - electrical lines
Explanation :
The most important parts of a hydroelectric power plant are the dam and the reservoir. The dam which is built on a large river, has a reservoir placed behind it to store water. The height of the water in the reservoir is directly proportional to the maximum possible potential energy from the water. The penstock is a long pipe or shaft which transfer the water from the reservoir to the power generation unit. Thus the water in the penstock has potential energy due to its height and kinetic energy due to its motion. The power generation unit contains turbines and generator. This water falls on the blades of the turbine which causes the blades to rotate. Thus the kinetic and potential energy of water is converted into the rotational motion of the turbine blades. The rotating blades causes the rotational motion of the turbine shaft, which is enclosed inside the generator where the electricity is produced. The rotational motion of the turbine shaft inside the generator generates magnetic field which is converted into alternating current by electromagnetic field induction. The transformer converts this electricity into a higher voltage which is then fed into power lines for distribution.
