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.

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.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

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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