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رد: مرجع لـ ( اتصال فيزياء 2 )
اسئلة الواجب ..
من PROBLEMS
س 5
5. (a) Two protons in a molecule are separated by 3.80 1010 m. Find the electric force exerted by one proton on the other. (b) How does the magnitude of this force com- pare to the magnitude of the gravitational force between the two protons? (c) What If? What must be the charge- to-mass ratio of a particle if the magnitude of the gravita- tional force between two of these particles equals the magnitude of electric force between them?
س7
Three point charges are located at the corners of an equi- lateral triangle as shown in Figure P23.7. Calculate the re- sultant electric force on the 7.00-C charge.
س8
8. Suppose that 1.00 g of hydrogen is separated into elec- trons and protons. Suppose also that the protons are placed at the Earth’s north pole and the electrons are placed at the south pole. What is the resulting compres- sional force on the Earth?
س9
9. Two identical conducting small spheres are placed with their centers 0.300 m apart. One is given a charge of 12.0 nC and the other a charge of 18.0 nC. (a) Find the electric force exerted by one sphere on the other. (b) What If? The spheres are connected by a conducting wire. Find the electric force between the two after they have come to equilibrium.
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