I think that drugs and their affects would be interesting to learn about, because its a big issue in our world today, and it's good to learn about these things (such as drugs/alcohol)
It's more accurate, especially since heart rate is almost universally measures in beats-per-minute, than, say, timing your pulse for a [factor of 60] seconds (30 seconds, 20 seconds, 15 seconds, 12 seconds, etc.).
Answer:
is there supposed to be a picture
Explanation:
1) C
2)C
3)B
5)C
9)B
sorry I wasn't able to answer all of your quesitons