babyissy2016
21.03.2020 •
Physics
A 29-kg child starts at the center of a playground merry-go-round that has a radius of 3.5 m and rotational inertia of 500 kg⋅m2 and walks out to the edge. The merry-go-round has a rotational speed of 0.20 s−1 when:.
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Ответ:
The half life of radium is 1600 years after how many years 25% of a radium block will remain Undecayed
25% of Radium block remains undecayed after 3200 years.
Explanation: