1. Force diagram for the balloon

2. FN Fg

3. FN Fg Fg

4. FE FN FN Fg Fg

5. Forget everything you know!!!
Subatomic Particles
Forget everything you know!!!

6. Subatomic Particles Protons (p+) Positive charge
In nucleus, hard to add/remove, “big”

7. Subatomic Particles Protons (p+) Neutrons (n0) Positive charge
In nucleus, hard to add/remove, “big”
Neutrons (n0)
Zero charge
In nucleus, “big”

8. Subatomic Particles Protons (p+) Neutrons (n0) Electrons (e-)
Positive charge
In nucleus, hard to add/remove, “big”
Neutrons (n0)
Zero charge
In nucleus, “big”
Electrons (e-)
Negative charge
Electron cloud, easy to add/remove, “small”

9. Subatomic Particles Protons v Electrons Proton about 2000x more mass
Equal charge size
e- = p+
Only electrons can move

10. Conservation of mass – All electrons must be accounted for
– Must “come from” or “go to” a location

11. Conservation of mass Charge – All electrons must be accounted for
– Must “come from” or “go to” a location
Charge
– Property of matter (like inertia)
– Caused by p+/e- imbalance
– Total does not matter, just imbalance
– Only electron movement (for both + and -)

12. Electricity Rules (so far)
Only electrons can move to/from a material

13. Electricity Rules (so far)
Only electrons can move to/from a material
Conservation: Total number of electrons equal before and after an event

14. Electricity Rules (so far)
Only electrons can move to/from a material
Conservation: Total number of electrons equal before and after an event
Charge: Caused by unequal amounts of protons and electrons in an object (gain or lose electrons)

16. Subatomic Particles Protons (p+) Neutrons (n0) Electrons (e-)
Positive charge
In nucleus, hard to add/remove, “big”
Neutrons (n0)
Zero charge
In nucleus, “big”
Electrons (e-)
Negative charge
Electron cloud, easy to add/remove, “small”

17. Subatomic Particles Protons v Electrons Proton about 2000x more mass
Equal charge size
e- = p+
Only electrons can move

18. Conservation of mass Charge – All electrons must be accounted for
– Must “come from” or “go to” a location
Charge
– Property of matter (like inertia)
– Caused by p+/e- imbalance
– Total does not matter, just imbalance
– Only electron movement (for both + and -)

19. Electricity Rules (so far)
Only electrons can move to/from a material
Conservation: Total number of electrons equal before and after an event
Charge: Caused by unequal amounts of protons and electrons in an object (gain or lose electrons)