What is the strength of the electric field 4.0 cm from a small glass bead that has been charged to +7.0 nC ? E = kQ/R² .. (N/C) E = (9.0^9)(7.0^-9C)/(0.04)² = 3.93*10^4 N/C (directed radially out from the bead) Glass Bead Making: Flamework for Beginners : Glass Bead-Making: Improvising to Create Beads OMG [...]
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