College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A charged comb often attracts small bits of dry paper that then fly away when they touch the comb. Explain why that occurs.
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- Two equal charges are situated on the x axis at 40.0 cm on either side of the origin as shown in the figure below. Location A is on the perpendicular bisector at a distance of 21.0 cm from the origin on the y axis. (Assume that the +x axis is directed to the right and they axis is directed up.) 91 *A 92 (a) If q,- -3.50 C and q,- -3.50 C what is the net electric field due to both charges at location A? Express your answer in vector form. 1.64-10%) x Did you consider the symmetry of the situation? What is the net contribution to the field from the x components of the field from each charge? N/C (b) If a, 3a, (where q,- -3.50 pC), what is the net electric field at location A due to both charges? Express your answer in vector form -4.68-10%-4.1-10% x If the two charges are unequal, what is the net contribution to the field from each charge in the two perpendicular directions? N/Carrow_forwardFe 10 T F l g -Jó d Two balls have the same mass of 1.043 kg and identical charges of 22.33 µC. They hang from the ceiling on strings of identical length as shown in the figure. If the angle with respect to the vertical of the strings is 27.25°, what is the length of the strings?arrow_forwardA point charge of 33 uC is placed at a distance of 36 cm from another identical charge. A charge of -1.5 uC is transferred from point a to point b as shown in the figure. Determine: a) The change in electrical potential energy b) If the -1.5 uC charge has an initial velocity of zero. What is its final velocity if it has a mass of 5.0 x 10-15 kg?arrow_forward
- Ch 18 q3 In 1910 Rutherford performed a classic experiment in which he directed a beam of alpha particles at a thin gold foil. He unexpectedly observed a few of the particles scattered almost directly backward. This result was not consistent with then current models of atomic structure and led Rutherford to propose the existence of a very dense concentration of positive charge at the center of an atom—the atomic nucleus. The alpha particle has a charge of +2e and the gold nucleus a charge of +79e. Suppose that an alpha particle is initially a great distance from the gold, has a kinetic energy of 4.20 MeV (4.20 106 eV), and is headed directly at a gold nucleus. How close will the particle come to the center of the nucleus? Treat the nucleus and the alpha particle as point charges.arrow_forward1) An initially non-charged gold leaf inside an electroscope has a total dimension of 2 [cm] x 4[cm]. It is folded in half to have two equal squares of 2 [cm] x 2 [cm] on either side.1a) A charged probe of +5*10^(-6) [C] is brought near the tip of the electroscope but does nottouch. What effect do you predict will happen to the gold leaves and why? 1b) The same charged probe now makes contact to the electroscope and it's net charge isreduced to +2.5*10^(-6) [C] and the electroscope is removed. Explain what had happened andwhat is the surface charge density of each of the squares of the gold leaf? 1c) If the gold leaf squares are separated by an angle of 90 degrees, what is the magnitude ofthe electric force per area between the centers of the squares? got part B I got -6.25*10^-3 and for part C I got -281.25 N/m^2 is this correct?arrow_forwardIn each picture, a positively charged particle moves from point i to point f. Is the change AU of the particle positive, negative, or zero? a) b) c) d) +) +) f) a Choose... + Choose... + Choose... + d Choose... + e Choose... + f Choose... + g Choose... + ()arrow_forward
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