Cs-124 has a half-life of 30.8 s. (a) If we have 7.8 μg initially, how many Cs nuclei are present?

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.