Answer:
i would choose bg and 78 degress and ty nb guhi jmio
Explanation:
Answer:
Centimeters
Explanation:
They move apart 2.5 centimeters each year
A radioactive element with a half-life of 1,000 years, and starting mass of 20 grams, will need 2,000 years to decrease to 5 grams.
Explanation:
The radioactive elements all have a specific half-life. Each element's half-life is well known, and they are used by scientists of numerous fields as they are excellent for determining the age of a particular item, be it or organic or non-organic nature. In this case, we have a radioactive element with a half-life of 1,000 years, and starting mass of 20 grams.
The half-life basically means that half of the mass of an element is lost during a particular period of time. For the element in question we need to find out how much time will be needed for it to decrease to 5 grams. In order to get to the result, we just need to add 1,000 years on every decrease of half of the mass:
20/2 = 10
10/2 = 5
So in 1,000 years, the element in question will decrease to 10 grams, and in further 1,000 years (2,000 cumulatively) it will decrease to 5 grams.
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It's because there are bigger faults in Caliifornia.Which is San andres which is 800 miles which cuts through California.We all know earth is contesntly changing, and earthquakes are apart of earth chaging.So every times the tictonic plates moves it causes California, and other states close by to aswell, but not as bad.
Desertification <span>is the persistent degradation of dryland ecosystems by variations in climate and human activities.</span>
