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Solve all the questions step by step and explain that how get the
answer:
1. Scuffing your feet across a carpet on a cold dry day, you pick up
45,196,023,522,512 electrons. How much charge is that, in
microcoulombs (uC)?
2. A hollow metal sphere of radius 14.5 cm carries a charge 1.17 uC. What is the
electric field strength, E, in N/C at a point a distance 20.5 cm away from its
surface? Use “e” notation for your answer.
3.
4. In a hydrogen atom, an electron with a charge of -1.6e-19 C orbits a proton with
the same but positive charge at a distance 68 picometers away (that’s trillionths of
a meter or 10-12 m). What electric force F, in nN (nano Newton), binds the two
particles together?
5. Protons carry a charge of +1.6e-19 C. If the repulsive force between two
protons in an atomic nucleus equals 93 N, how far apart are the protons, in
femtometers (that’s 10 -15 meters)?
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