They are called Periods. Lesser known as series
My Choice will be the sample C with a coefficient of absorption 62 % and the reason is that the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest. Because this sample has the highest percentage of the coefficient of absorption than the other samples, As the sound Absorption coefficient is a part of the sound energy that absorbed by a material.And Its value varies with the angles of incident and frequency. So sample C is the best to be used as a soundproof room.
Does the earth have the same amount of water it had in the beginning? Yes, the water always gets recycled naturally. That’s why there is never a scarcity of a sea water, however, there is a scarcity of fresh water. Let’s find out more about the Depletion of Water Table.
The two main causes of Depletion of Water Table are Deforestation and Over-pumping of groundwater.
Answer:
3.6132 * 10^24 atoms/molecules of 02
Explanation:
When we look at the balanced chemical equation, we can see that there are 6 moles of O2.
In order to convert from moles to formula units (atoms and molecules),
you need to multiply by avogadro's number.
6 moles * 
/1 mol = 3.6132 * 10^24 atoms/molecules of 02
