Hello!
So, day and night are caused because the earth makes a full rotation on its axis once every 24 hours.
That way, have of Earth is facing the sun (it is morning on that side) and the other half isn't (which is why it is nighttime over there).
For example, if it's nighttime in Canada and America, it's morning in Pakistan and India. This is because Pakistan and India are facing the sun whilst Canada and America are not.
A N S W E R:
The balls should be moved so that half the Earth is facing the sun and the other half is not. This would be 24 hours. As for the sun, it is a gas, not a solid, so it doesn't rotate like one. However, that does not mean that it is not rotating to some extent.
The reactants for photosynthesis are light energy, water, carbon dioxide and chlorophyll, while the products are glucose (sugar), oxygen and water.
Answer:
Option B, ![18.11 \frac{N}{cm^{2}}](https://tex.z-dn.net/?f=18.11%20%5Cfrac%7BN%7D%7Bcm%5E%7B2%7D%7D)
Explanation:
Given-
The average surface area of one foot pad of an elephant is
![cm^{2}\\](https://tex.z-dn.net/?f=cm%5E%7B2%7D%5C%5C)
Weight of an Asian elephant is
newton
As we know, pressure is equal to total weight divided by total area of the surface on which it is concentrated.
Thus, pressure on one foot pad of elephant is ![\frac{52900}{2920} \frac{N}{cm^{2}} \\](https://tex.z-dn.net/?f=%5Cfrac%7B52900%7D%7B2920%7D%20%5Cfrac%7BN%7D%7Bcm%5E%7B2%7D%7D%20%5C%5C)
![= 18.11\frac{N}{cm^{2}}](https://tex.z-dn.net/?f=%3D%2018.11%5Cfrac%7BN%7D%7Bcm%5E%7B2%7D%7D)
Hence, option B is correct answer
Answer:
The carbon-dioxide exists in the atmosphere, and it is dissolved in the water.
Explanation:
With the process of photosynthesis, it becomes organic, and by breathing, the organic gas goes back to carbon-dioxide.
The assimilation of carbon is the process when the carbon-dioxide converts to organic carbon with the help of living organisms. This organic carbon is then used for energy.