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20. Fill in the rest of the chart and predict the number of F-18 nuclei left and the number of
new 0-18 nuclei produced.
Time (hours)
Number of half-lives
F-18 Nuclei (%)
0-18 Nuclei (%)
0.0
Start
100
0
2.0
1
4.0
2
6.0
3
8.0
4
10.0
5
12.0
6
14.0
7
16.0
8
18.0
9
20
10

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

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