Half life is the period of time it takes for one-half of the atoms of an original isotope to decay.
![formula=(\frac{1}{2})^{n}](https://tex.z-dn.net/?f=formula%3D%28%5Cfrac%7B1%7D%7B2%7D%29%5E%7Bn%7D)
In this example we have:
where n= the number of half lives.
Thus: ![\frac{1.25kg}{10kg} =\frac{1}{8}](https://tex.z-dn.net/?f=%5Cfrac%7B1.25kg%7D%7B10kg%7D%20%3D%5Cfrac%7B1%7D%7B8%7D)
From this equation n=3. The answer to your question is: 3 half lives have passed which gives the meteorite an age of 4.5*3= 13.5 billion years.
<span>A HEALTH psychologist examines ways in which lifestyle, habits, and attitudes are related to heart disease, cancer and diabetes. </span>
Answer: So life can continue for them
Explanation:
The three main reasons why cell division is important in organisms are reproduction, repair and growth, according to "McDougal Littell Science Cells and Heredity.". Cell division is necessary in order for life to continue. Cell division serves as a means of reproduction in unicellular organisms through binary fission
Answer:
Actually, in physical cosmology, Big Bang nucleosynthesis (or primordial nucleosynthesis) refers to the production of nuclei other than H-1, the normal, light hydrogen, during the early phases of the universe, shortly after the Big Bang. About first millisecond, the universe had cooled to a few trillion kelvins (1012 K) and quarks finally had the opportunity to bind together into free protons and neutrons. Free neutrons are unstable with a half-life of about ten minutes (614.8 s) and formed in much smaller numbers. The abundance ratio was about seven protons for every neutron. Before one neutron half-life passed nearly every neutron had paired up with a proton, and nearly every one of these pairs had paired up to form helium. By this time the universe had cooled to a few billion kelvins (109 K) and the rate of nucleosynthesis had slowed down significantly.
Explanation:
1 higher tolerance to insects
2DNA cloning
3 could harm beneficial insects