IB Physics: Half Lives

Defines half life, introduces the radioactive decay curve, and relevant formulas. Solves several examples.
IB Physics Topic 7.2
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[carameldogs]

at 5:30 everytime you said the unit of time it changed!! haha It went from 3 hours to 6 days to 9 years :')

[JaZoN_XD]

HL3 pls... everytime i hear the words half-life whether it's math or physics or chemistry seriously. They just need to release it hahaha

[oshasrahimi]

In an old IB exam question, it is asked to find the decay activity after a certain amount of hours however, they also stated that there was average background activity present. In such case, how would you incorporate it into the equation of activity.

Thank you for these great videos.

[pyrodracoaureus]

I'm confused about probability and half-lives. I don't quite understand the connection between the two. I thought half-life is just defined as a set amount of time it takes for a particular substance to halve its original amount. I don't understand how probability is involved. Can you explain? Thanks and great video btw!

[coolkid]

In my class, the teacher gave us another formula, N x e^(kt) where k = e^(1/halflife). Whats this formula about?

[canberkozsu]

What does it mean for a particle to decay ?

[lathem]

This video is missing a lot of information about Half-lives, such as the decay constant, Equations for Activity and Number of radioactive nuclei, background radiation, etc...