Physics
7th Edition
ISBN: 9780321733627
Author: Douglas C. Giancoli
Publisher: PEARSON
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Chapter 17, Problem 21P
(a) What is the electric potential
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(a) A point charge Q creates an electric
potential of +125 V at a distance of 15 cm.
What is Q?
(b) What is the electric potential at a distance
of 2.5x10-15 m away from a proton?
(c) What is the electric potential energy of a
system that consists of two protons 2.5x10-15
m apart, as might occur inside a typical
nucleus?
1)What is the electric potential due to the nucleus of hydrogen at a distance of 6.50×10-11 m? Assume the potential is equal to zero as r→∞. (Express your answer to three significant figures.)
Two protons in the nucleus of a 238U atom are 6.0 fm (6.0x10-15m) apart. What is the potential energy (in joules) associated with the electric force that acts between these two particles?
Chapter 17 Solutions
Physics
Ch. 17 - Prob. 1OQCh. 17 - Prob. 1QCh. 17 - If a negative charge is initially at rest in an...Ch. 17 - State clearly the difference (a) between electric...Ch. 17 - An electron is accelerated from rest by a...Ch. 17 - Is there a point along the line joining two equal...Ch. 17 - Prob. 6QCh. 17 - Prob. 7QCh. 17 - Can two equipotential lines cross? ExplainCh. 17 - Prob. 9Q
Ch. 17 - When a battery is connected to a capacitor, why do...Ch. 17 - Prob. 11QCh. 17 - The parallel plates of an isolated capacitor carry...Ch. 17 - Prob. 13QCh. 17 - Prob. 14QCh. 17 - Prob. 15QCh. 17 - Prob. 16QCh. 17 - Prob. 17QCh. 17 - Prob. 18QCh. 17 - Prob. 1MCQCh. 17 - Two identical positive charges are placed near...Ch. 17 - Four identical point charges are arranged at the...Ch. 17 - Prob. 4MCQCh. 17 - Prob. 5MCQCh. 17 - Prob. 6MCQCh. 17 - Prob. 7MCQCh. 17 - Prob. 8MCQCh. 17 - Prob. 9MCQCh. 17 - Prob. 10MCQCh. 17 - Prob. 11MCQCh. 17 - How much work does the electric field do in moving...Ch. 17 - How much work does the electric field do in moving...Ch. 17 - What potential difference is needed to stop an...Ch. 17 - How much kinetic energy will an electron gain (in...Ch. 17 - An electron acquires 6.4510-16 J of kinetic energy...Ch. 17 - How strong is the electric field between two...Ch. 17 - An electric field of 525 V/m is desired between...Ch. 17 - The electric field between two parallel plates...Ch. 17 - What potential difference is needed to give a...Ch. 17 - Two parallel plates, connected to a 45-V power...Ch. 17 - The work done by an external force to move a -6.50...Ch. 17 - What is the speed of an electron with kinetic...Ch. 17 - Prob. 13PCh. 17 - Prob. 14PCh. 17 - An electric field greater than about 3 x 106 V/m...Ch. 17 - 16. (II) An electron starting from rest acquires...Ch. 17 - Prob. 17PCh. 17 - Prob. 18PCh. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - (a) What is the electric potential 2.51015m away...Ch. 17 - Prob. 22PCh. 17 - Prob. 23PCh. 17 - Prob. 24PCh. 17 - Prob. 25PCh. 17 - How much work must be done to bring three...Ch. 17 - Prob. 27PCh. 17 - Prob. 28PCh. 17 - Prob. 29PCh. 17 - Prob. 30PCh. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Calculate the electric potential due to a dipole...Ch. 17 - The dipole moment, considered as a vector, points...Ch. 17 - Prob. 35PCh. 17 - Prob. 36PCh. 17 - Prob. 37PCh. 17 - Prob. 38PCh. 17 - The charge on a capacitor increases by 15 C when...Ch. 17 - Prob. 40PCh. 17 - If a capacitor has opposite 4.2 µC charges on the...Ch. 17 - Prob. 42PCh. 17 - Prob. 43PCh. 17 - Prob. 44PCh. 17 - Prob. 45PCh. 17 - Prob. 46PCh. 17 - Prob. 47PCh. 17 - What is the capacitance of a pair of circular...Ch. 17 - Prob. 49PCh. 17 - Prob. 50PCh. 17 - Prob. 51PCh. 17 - Prob. 52PCh. 17 - Prob. 53PCh. 17 - Prob. 54PCh. 17 - A homemade capacitor is assembled by placing two...Ch. 17 - Prob. 56PCh. 17 - Prob. 57PCh. 17 - Prob. 58PCh. 17 - Prob. 59PCh. 17 - Prob. 60PCh. 17 - Write the binary number 1010101010101010 as a...Ch. 17 - Prob. 62PCh. 17 - Prob. 63PCh. 17 - Prob. 64PCh. 17 - Prob. 65PCh. 17 - Prob. 66PCh. 17 - Prob. 67PCh. 17 - Prob. 68GPCh. 17 - Prob. 69GPCh. 17 - Prob. 70GPCh. 17 - Prob. 71GPCh. 17 - Prob. 72GPCh. 17 - Prob. 73GPCh. 17 - Dry air will break down if theelectric field...Ch. 17 - Prob. 75GPCh. 17 - Prob. 76GPCh. 17 - Prob. 77GPCh. 17 - Prob. 78GPCh. 17 - Prob. 79GPCh. 17 - Prob. 80GPCh. 17 - Prob. 81GPCh. 17 - Prob. 82GPCh. 17 - Prob. 83GPCh. 17 - Prob. 84GPCh. 17 - Prob. 85GPCh. 17 - Prob. 86GPCh. 17 - Prob. 87GPCh. 17 - Prob. 88GPCh. 17 - Prob. 89GPCh. 17 - Prob. 90GPCh. 17 - Prob. 91GPCh. 17 - Prob. 92GPCh. 17 - Prob. 93GPCh. 17 - In the dynamic random access memory (DRAM)of a...Ch. 17 - Prob. 95GPCh. 17 - Prob. 96GP
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- (a) Find the potential difference VB required to stop an electron (called a slopping potential) moving with an initial speed of 2.85 107 m/s. (b) Would a proton traveling at the same speed require a greater or lesser magnitude potential difference? Explain. (c) Find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential, Vp/Ve. The answer should be in terms of the proton mass mp and electron mass me.arrow_forwardThe probability of fusion occurring is greatly enhanced when appropriate nuclei are brought close together, but mutual Coulomb repulsion must be overcome. This can be done using the kinetic energy of high- temperature gas ions or by accelerating the nuclei toward one another. (a) Calculate the potential energy of two singly charged nuclei separated by 1.001012. (b) At what temperature will atoms of a gas have an average kinetic energy equal to this needed electrical potential energy?arrow_forwardThe liquid-drop model of the atomic nucleus suggests high-energy oscillations of certain nuclei can split the nucleus into two unequal fragments plus a few neutrons. The fission products acquire kinetic energy from their mutual Coulomb repulsion. Assume the charge is distributed uniformly throughout the volume of each spherical fragment and. immediately before separating each fragment is at rest and their surfaces are in contact. The electrons surrounding the nucleus can be ignored. Calculate the electric potential energy (in electron volts) of two spherical fragments from a uranium nucleus having the following charges and radii: 38e and 5.50 10-15 m. and 54e and 6.20 10-15 m.arrow_forward
- In the Bohr model, the electron moves in a circular orbit around the nucleus with a radius of 5 . 29 × 10 - 11 m .what electric potential energy does the electron have?arrow_forwardCSM.10 One way to measure nuclear radii is to determine the initial speed that a proton fired at a nucleus must have to be absorbed. Suppose you fire a proton directly at the nucleus of a gold atom, which contains 79 protons and neutrons. Since both the proton and the gold nucleus are positively charged, they will repel each other electrostati cally. What must the proton's minimum initial speed (as a fraction of the speed of light) be if it is to penetrate that nucleus (whose radius is R 6 fm)? (a) Give your answer symbolically in terms of R, the Cou- lomb constant 1/4TEo, the speed of light c, the charge on the proton q, and the proton's mass m. (b) What is this fraction's numerical value? (Hints: What must the proton's speed be at its point of closest approach if the collision is head-on and it barely touches the nucleus? Note also that the particles' initial separation will be essentially infinite compared to 6 fm. Neutrons have no charge, so the charge of a gold nucleus will be 79…arrow_forwardProblem 1: White dwarf star A white dwarf star is essentially a degenerate electron gas, with a bunch of nuclei mixed in to balance the charge and to provide the gravitational attraction that holds the star together. White dwarf stars tend to be extremely hot by our standards; nevertheless, it is an excellent approximation in this problem to set T=0. The gravitational potential energy inside a star of uniform density is Ugrav = 3 см2 a) Assuming that the star contains one proton and one neutron for each electron, and that the electrons are nonrelativistic, show that the total (kinetic) energy of the degenerate electrons equals h²M³ Ukinetic = (0.0088)- męm R? b) The equilibrium radius of the white dwarf is that which minimize the total energy Ugrav + Ukinetie: Sketch the total energy as a function of R, and find a formula for the equilibrium radius in terms of the mass. As the mass increases, does the radius increase or decrease? Does this make sense? c) Evaluate the equilibrium radius…arrow_forward
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