Answer:
C-14 from fossil had reached itshalf life
Explanation:
For radiactive isotopes (such as Carbon-14), per definition; the semi life or semi disintegration period; is defined as the time for which a certain mass isotope mass disintegrates to half of the atoms that make it up
For Carbon-14, this semi life period is 5730 years , and for the above example, as it is mentioned that we originally had 254 grams of C-14 but we currently have 127 grams (this is, exaclt half of the original mass of 254 grams), this leads us that 5730 years have passed since the original mass and the final mass (that is, one semi life period of C-14)
The problem is that mold was growing in some of the dishes. The hypothesis is that the mold can cure bacteria.
Alcohol gives you energy is not true about alcohol. So, the correct option is (c).
As a depressive, alcohol can upset this equilibrium and have an impact on our emotions, thoughts, and behaviour. This is due in part to neurotransmitters, which are molecules that aid in signal transmission from one brain nerve to another.
Your coordination will be impaired by alcohol since it will require more mental effort to cause your muscles to obey directions. Your brain needs more time to see, comprehend, relate to, and decide how to respond to something when you drink alcohol. Alcohol has an impact on almost every organ system in our body.
Therefore, Alcohol gives you energy is not true about alcohol. So, the correct option is (c).
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