Physics, 16.09.2021 03:00 sweetmochi13
Analysis of a basalt rock sample shows that 25% of its radioactive K-40 remained undecayed. How old is the basalt?
A) 2.6 billion years
4.6 billion years
B) 1.3 billion years
D) 3.9 billion years
Answers: 2
Physics, 22.06.2019 16:30
A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.
Answers: 2
Physics, 22.06.2019 19:10
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Answers: 1
Analysis of a basalt rock sample shows that 25% of its radioactive K-40 remained undecayed. How old...
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