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Table 1 shows the student's count-rate measurements for the sample.
Table 1
Time (minutes)
0
30
60
90
120
150
180
210
Count-rate (cps)
160
120
80
60
40
30
20
15
2.4
Use Table 1 to determine the half life of bismuth-212.

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Ineed this now one scientist feels that the changes in global climatic patterns may be good for the health of the biosphere. another scientist feels that sharp changes in climatic patterns could result in the extinction of the biosphere. which of these is the most likely reason the two scientists gave conflicting opinions on the impact of changes in the global climatic pattern? they do not have enough knowledge on the topic. they did not discuss the issue among themselves. they believe conflicting opinion strengthens science. they study different areas of science and have different scientific focuses.