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Q. A charge of +1 coulombs is placed at the 0 cm mark of a meter stick. A charge of +4 coulombs is placed at the 100 cm mark of the same meter stick. Is it possible to place a proton somewhere on the meter stick so that the net force on it due to the charges at the ends is 0? If so, where should it be place? Explain.

Q. Electrical wire with a diameter of 0.50cm is wound on a spool with a radius of 30cm and a height of 24cm. a)Through how many radians must the spool be turned to wrap one even layer of wire? b) what is the length of this wire?

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