An adaptation is a mutation, or genetic change, that helps an organism, such as a plant or animal, survive in its environment.
Answer:
<h3>A. </h3>
Explanation:
Mechanical energy is energy in motion is the example of mechanical energy⚡
Warm air can “hold” more water vapor than cool air because as the air warms its molecules move farther apart, making room for more molecules. This leads to the idea that as air cools its molecules move closer together, “squeezing” out water vapor.
<u>Answer:</u> The tree was burned 16846.4 years ago to make the ancient charcoal
<u>Explanation:</u>
The equation used to calculate rate constant from given half life for first order kinetics:
![t_{1/2}=\frac{0.693}{k}](https://tex.z-dn.net/?f=t_%7B1%2F2%7D%3D%5Cfrac%7B0.693%7D%7Bk%7D)
where,
= half life of the reaction = 5715 years
Putting values in above equation, we get:
![k=\frac{0.693}{5715yrs}=1.21\times 10^{-4}yrs^{-1}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B0.693%7D%7B5715yrs%7D%3D1.21%5Ctimes%2010%5E%7B-4%7Dyrs%5E%7B-1%7D)
Rate law expression for first order kinetics is given by the equation:
![k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B2.303%7D%7Bt%7D%5Clog%5Cfrac%7B%5BA_o%5D%7D%7B%5BA%5D%7D)
where,
k = rate constant = ![1.21\times 10^{-4}yr^{-1}](https://tex.z-dn.net/?f=1.21%5Ctimes%2010%5E%7B-4%7Dyr%5E%7B-1%7D)
t = time taken for decay process = ? yr
= initial amount of the sample = 100 grams
[A] = amount left after decay process = 13 grams
Putting values in above equation, we get:
![1.21\times 10^{-4}=\frac{2.303}{t}\log\frac{100}{13}\\\\t=16864.4yrs](https://tex.z-dn.net/?f=1.21%5Ctimes%2010%5E%7B-4%7D%3D%5Cfrac%7B2.303%7D%7Bt%7D%5Clog%5Cfrac%7B100%7D%7B13%7D%5C%5C%5C%5Ct%3D16864.4yrs)
Hence, the tree was burned 16846.4 years ago to make the ancient charcoal
I think you mean alcohol ? if so there are a few basic types including ethanol