Answer:
<em> A. 38%</em>
Explanation:
Percentage increase in carbon dioxide concentration = (Increase in concentration of carbon dioxide/initial concentration)×100
P = (C₂-C₁/C₁)×100...................... Equation 1
Where P = percentage increase in the concentration of carbon dioxide from 1970 to 2007, C₁ = The atmospheric concentration of carbon dioxide in 1970, C₂ = The atmospheric concentration of carbon dioxide in 2007.
<em>Given: C₁ = 278 ppm, C₂ = 383 ppm.</em>
Substituting these values into equation 1
<em>P = [(383-278)/278]×100</em>
<em> P = (105/278)×100</em>
<em>P = 37.7%</em>
<em>P ≈ 38%</em>
<em>Thus the approximate percentage increase in carbon dioxide concentration from 1790 to 2007 is 38%</em>
<em>The right option is A. 38%</em>
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Answer:
Option A
Explanation:
Renewable resources of energy are clean source of energy. They are sustainable as they are readily available, can be used again and again and do not produce any pollution neither during production stage nor during usage stage by an individual.
There are very nations in the world which are oil rich and country itself has no oil reserve. In such scenarios, the dependency of nation on other countries increases. But in lieu to in-house renewable energy resources, country will not import oil from other nations
Hence, option A is correct.
The log will float on the water because his density is lower than the liquid, so it will stay at the top due to Archimedes' principle.
<span>Archimedes' principle is a physical law that describes the upward force (the vertical thrust) experienced by any body immersed in a fluid (liquid or gas). This force is strongly related to the density of both the fluid and the body.
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You can try the experience at home, by using an object that has a lower density than the water like the sunflower oil, you will see that it will stay at the top of the water too.
In telophase, the cell is nearly done dividing, and it starts to re-establish its normal structures as cytokinesis (division of the cell contents) takes place. The mitotic spindle is broken down into its building blocks. Two new nuclei form, one for each set of chromosomes.
