1.(10) (a) Two engineering students, John with a mass of 60 kg, and Mary with a mass of 60 kg, are 30 m apart. Suppose that each student has a 0.01% imbalance in the amount of positive and negative charge. This is achieved by removing 0.01% of the protons from John's body and depositing them on Mary. Find the order of magnitude of the electrostatic force between them by replacing each student with a sphere of water having the same mass as the student. Water has a molecular weight of 18 grams and there are 10 protons per molecule. (10) (b) If the excess protons removed from John are distributed uniformly throughout Mary's sphere whose radius is (0.25 m, find the electric field at a point 0.15 m from the center of Mary's sphere. Neglect the charge on John.

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Chapter1: Units, Trigonometry. And Vectors
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1.(10) (a) Two engineering students, John with a mass of 60 kg, and Mary with a mass of
60 kg, are 30 m apart. Suppose that each student has a 0.01% imbalance in the amount of
positive and negative charge. This is achieved by removing 0.01% of the protons from
John's body and depositing them on Mary. Find the order of magnitude of the
electrostatic force between them by replacing each student with a sphere of water having
the same mass as the student. Water has a molecular weight of 18 grams and there are 10
protons per molecule.
(10) (b) If the excess protons removed from John are distributed uniformly throughout
Mary's sphere whose radius is (0.25 m, find the electric field at a point 0.15 m from the
center of Mary's sphere. Neglect the charge on John.
Transcribed Image Text:1.(10) (a) Two engineering students, John with a mass of 60 kg, and Mary with a mass of 60 kg, are 30 m apart. Suppose that each student has a 0.01% imbalance in the amount of positive and negative charge. This is achieved by removing 0.01% of the protons from John's body and depositing them on Mary. Find the order of magnitude of the electrostatic force between them by replacing each student with a sphere of water having the same mass as the student. Water has a molecular weight of 18 grams and there are 10 protons per molecule. (10) (b) If the excess protons removed from John are distributed uniformly throughout Mary's sphere whose radius is (0.25 m, find the electric field at a point 0.15 m from the center of Mary's sphere. Neglect the charge on John.
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