Burning coal causes a large amount of air pollution.
When coal is burned, it releases many air pollutants. This includes mercury, lead, sulfur dioxide, nitrogen oxides, and other unsafe gasses and heavy metals. This is extremely harmful for humans and the Earth.
Answer:
The answer however is yes you can, but you would probably die. The body mechanism for crying under water works just as fine above as below the water. So you can cry tears, they would just be mixed with the rest of the water.
Explanation:
Answer: D) By decreasing the activation energy of a reaction
A catalyst is a substance that speed up the rate of chemical reaction without affecting the product of the reaction. They only affect the rate of reaction not the yield of reaction.
Catalyst provide an alternative reaction pathway that has lower activation energy than that of uncatalysed reaction. It increases the frequency of collision and because of these greater collision which lowers the activation energy of the reaction.
Robert Hooke discovered Nucleus in the cell !!
So, C is the most appropriate answer !! as nucleus contains genetic material and is passed to daughter cells !!
