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|Extension A: Exploring the Region around a Magnet|
|Extension B: Evaluating Magnetism Models||HTML5|
|Extension C: Explaining Another Magnetic Phenomenon|
|Extension A: Which Charge Is Which?|
|Extension B: The Law of Electric Charges|
|Extension D: What Do the Charged Entities Represent?|
|Extension E: What Happens When a Charged Object Is Discharged? [Discharging Charged Objects]|
John Travoltage Simulation (HTML5)