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1. Three point charges, +2.0 μC , -4.0 μC , and +6.0 μC are placed in...

1. Three point charges, +2.0 μC , -4.0 μC , and +6.0 μC are placed in that order along a straight line with 18 cm separating adjacent charges. Calculate the force on each charge.

2. Calculate the electric field strength required to support a proton (at the Earth’s surface).

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