The water cycle will be discussed here.
<h3>
What is Water cycle?</h3>
This is defined as the continuous manner in which water is moved within the earth and the atmosphere.'
The water cycle comprises of steps such as:
Humans however disrupt water cycle through the damming of rivers and deforestation.
Read more about Water cycle here brainly.com/question/25796102
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Answer:
Part A: 36 MBq; Part B: 18 MBq
Explanation:
The half-life is the time it takes for half the substance to disappear.
The activity decreases by half every half-life
A =Ao(½)^n, where n is the number of half-lives.
Part A
3.0 da = 1 half-life
A = Ao(½) = ½ × 72 MBq = 36 MBq
Part B
6.0 da = 2 half-lives
A = Ao(½)^2 = ¼ × 72 MBq = 18 MBq
Answer:I am not sure how
Explanation: sorry free trial