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Coulomb’s Law Did everyone read their Book??? Mastering physics registration?. Wimhurst machine. pop-bottle machine demo. blues from Wimhust. Reds from Wimhust. Zap. Zap. Zap. zap. zap. zap. zap. STOP !!. Coulomb’s Law al l’experiment. Make all in the same way.

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Presentation Transcript
slide1

Coulomb’s Law

Did everyone read their Book???

Mastering physics registration?

Wimhurst machine

pop-bottle machine demo

slide2

blues from

Wimhust

Reds from

Wimhust

slide3

Zap

Zap

slide14

zap

STOP !!

slide15

Coulomb’s Law al l’experiment

Make all in the same way

Standard red charges

slide24

Experimental results: RED charges

(and is repulsive !!)

Check: Blue-Blue follows the same rules!

slide27

Experiment: Making a standard BLUE charge?

adjust Quntil

Then the amount of blue charge is the same as the amountQS of red

slide28

The semi-final analysis

Red or blue types

slide29

The final analysis

Red or blue types

slide30

Conventions:

is red kind of charge

is blue kind of charge

means repulsive

means attractive

slide31

Unit of charge = Coulomb

How much

What type (Blue)

slide41

Nimitz-class super carrier’s weight?

Displacement ≈ 102,000 tons ≈ 9×108 N

Force between two 1-C

Charges separated by

One meter

Weight of ten of these aircraft carriers

slide42

Lesson: a Coulomb is a lot of charge!

How much charge (Q) required to provide F = 1 N at a separation of 1 cm ? Next page!

slide47

Number example

1.50 cm

Net force on this charge?

2.00 cm

slide50

All the forces acting on our charge of interest:

C) Net? Add them up

1.50 cm

96 N

204 N

slide54

Coulomb Hockey SIM

http://phet.colorado.edu/en/simulation/electric-hockey