When scientists say something is millions of years old. How do they figure that out? Or dating something to a specific time period even as close as thousands of years ago? -
![72. The half life of a radioactive substance is 20 days. If part of the substance has decayed in time t, and part of it has decayed in time ti then the 72. The half life of a radioactive substance is 20 days. If part of the substance has decayed in time t, and part of it has decayed in time ti then the](https://d2rrqu68q7r435.cloudfront.net/images/4486864/35cdf79f-8474-4880-81af-6f8b1c7e6039.jpg)
72. The half life of a radioactive substance is 20 days. If part of the substance has decayed in time t, and part of it has decayed in time ti then the
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PHYS 4: non calculus based physics second semester] isn't C needed to solve for half life, but you can't solve for C without the time constant? please help : r/PhysicsStudents
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