Question

Home work foy ch 23 1. A cork ball that is covered with conducting paint and charged to 4 × 10-10C is touched by an identical but un- charged cork ball; the balls then separate. This second cork ball is then touched by a third uncharged cork ball, and they separate. What is the charge of each ball at the end. and how many excess electrons does each ball have? 2. An electron and a proton attract each other with a 1/r elec- tric force, just like the gravitational force. Suppose that an elec- tron moves in a circular orbit about a proton. (a) If the period of the circular motion is 24 h, what is the radius of the orbit? (b) If the period is 4 x 10-16 s, as it is in a hydrogen atom, what is the radius of the orbit? 3 Two cork balls, each of mass 0.20 g. are hung by insulating threads 20.0 cm long from a common point. The cork balls ane given an equal charge by a Teflon rod. The balls repel and de- flect as shown in Fig. 3-1 What charge g was given to each cork ball? Assume uniform charge. 9. 20 cm20cm iS in pa spi 10 A FIGURE 3-

$6. Charges +q,-q, tq, and-q are placed along the x-axis, at positions x = 0, x = 1 cm, x = 2 cm. and x = 3 cm, respec- tively. What is the force on a charge Q +34 placed at the point (x, y) ( 1.5 cm. y0), where yo is a variable? 7. Find the electric field due to the nucleus of an atom of gold (Z = 79) at a point I nmn from the nucleus. Treat the nucleus as a point. What is the force on an electron at that point? 8. Five charges are located at five of the corners of a regular hexagon with sides of 10 cm, as shown on Fig. 8-1 (see . below). Find the electric field at the sixth corner of the hexagon. \E= ? ㄧㄧㄨ Fig.8-1$

Answer 1

Hey Buddy, Due to some time restrictions I am not able to solve all the questions at once. So kindly post the remaining questions as a single question to get it solved.

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