It seems like your message got cut off. If Sam is comparing the half-lives of two substances, he may be looking to understand how long each substance takes to decay to half of its original amount.
Could you provide more details or clarify what specific information or comparison you are looking for? For example:
- What two substances is Sam comparing?
- Is he analyzing the implications of their half-lives (e.g., for medical applications, nuclear decay, etc.)?
- Are there specific calculations or comparisons he's trying to make?
Any additional information would be helpful!