Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 5, Problem 17QAP
To determine
The reason for clumps to grow into planetesimals.
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7. An electron has been placed at the origin. The grid spacing is 1 Angstrom per small square this time. You put a nucleus with 9 protons on the x-axis at x = 3.0 Angstroms. There will be a place on the x-axis where the total electric field is zero. At what value of x does this occur?
0.18 Angstroms
-1.50 Angstroms
-0.60 Angstroms
0.36 Angstroms
6.Two protons in an atomic nucleus are typically separated by a distance of 2 x 10-15 m. The electric repulsive force between the protons is huge, but the attractive nuclear force is even stronger and keeps the nucleus from bursting apart. What is the magnitude of the electric force between two protons separated by 2.00 x 10-15 m?
27. Orbiting Charges. A point charge of mass and charge m1 = 2.00 g and q1 = 5.00 µC is orbiting in a
perfectly circular orbit by around another point charge of mass and charge m2 = 5.00 g and q2 = -2.00 µC
through electrostatic forces. If the distance between these two charges is a constant d = 1.00 m, find the
orbital period of q1. You may assume gravitational forces are negligible.
Chapter 5 Solutions
Understanding Our Universe
Ch. 5.1 - Prob. 5.1CYUCh. 5.2 - Prob. 5.2CYUCh. 5.3 - Prob. 5.3CYUCh. 5.4 - Prob. 5.4CYUCh. 5.5 - Prob. 5.5CYUCh. 5.6 - Prob. 5.6CYUCh. 5 - Prob. 1QAPCh. 5 - Prob. 2QAPCh. 5 - Prob. 3QAPCh. 5 - Prob. 4QAP
Ch. 5 - Prob. 5QAPCh. 5 - Prob. 6QAPCh. 5 - Prob. 7QAPCh. 5 - Prob. 8QAPCh. 5 - Prob. 9QAPCh. 5 - Prob. 10QAPCh. 5 - Prob. 11QAPCh. 5 - Prob. 12QAPCh. 5 - Prob. 13QAPCh. 5 - Prob. 14QAPCh. 5 - Prob. 15QAPCh. 5 - Prob. 16QAPCh. 5 - Prob. 17QAPCh. 5 - Prob. 18QAPCh. 5 - Prob. 19QAPCh. 5 - Prob. 20QAPCh. 5 - Prob. 21QAPCh. 5 - Prob. 22QAPCh. 5 - Prob. 23QAPCh. 5 - Prob. 24QAPCh. 5 - Prob. 25QAPCh. 5 - Prob. 27QAPCh. 5 - Prob. 28QAPCh. 5 - Prob. 29QAPCh. 5 - Prob. 30QAPCh. 5 - Prob. 31QAPCh. 5 - Prob. 32QAPCh. 5 - Prob. 34QAPCh. 5 - Prob. 35QAPCh. 5 - Prob. 36QAPCh. 5 - Prob. 37QAPCh. 5 - Prob. 38QAPCh. 5 - Prob. 39QAPCh. 5 - Prob. 40QAPCh. 5 - Prob. 41QAPCh. 5 - Prob. 42QAPCh. 5 - Prob. 43QAPCh. 5 - Prob. 44QAPCh. 5 - Prob. 45QAP
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- 1. Assume that in interplanetary space the distance between two protons is about 0.08 cm. The electric force between the two protons is A. attractive B. repulsivearrow_forward9%) Problem 1: An archaeon has 7.3 × 10¹6 protons and a net charge of 1.5 pC. 50% Part (a) How many fewer electrons are there than protons? Np - Ne || =arrow_forwardTwo electrons are separated by one cm. What is the ratio of the electric force to the gravitational force between them? (me = 9.11´ 10-31 kg, ke = 8.99' 10° Nxm²/C², G = 6.67 ´ 10-11 Nxm²/kg², %3D and e = 1.6 10-19 C) 2.3 102 O 1.3´ 1020 3.1 1022 4.2 1042arrow_forward
- 4) There is a 2 C point charge at the origin and a 1 C point charge on the x axis at x= 1 meter. Where on the x axis (at finite x) would the electric field be zero? What if the charge at X = 1 meter was -1C? 5) How strong would an electric field need to be to accelerate an electron at 1,000,000 meters per second squared? 6) You go to the science museum and put your hand on the metal ball and your hair sticks up straight, and you know, science. Briefly explain why this happens to Mr. Scott's hair. (The metal ball is the charged top of a Van de Graaff generator.)arrow_forward6) Consider the proton to be a tiny, thin spherical shell of radius Ro, mass mp and charge e. Assume that the charge and the mass of the proton are uniformly distributed throughout the volume inside the sphere of radius Ro. Calculate the escape velocity of the electron which is located just above the surface of the shell.arrow_forward47. The electric charge (in Coulombs, C) in a spherical surface leak at a rate proportional to the amount present. The initial charge is 7C and 2/5 of it leaks off in 15 minutes. Which of the following represents the portion of the charge that remains in the spherical surface? exp(-0.03405504158t) O1- exp(-0.06108604879t) exp(-0.06108604879t) O1-exp(-0.03405504158t)arrow_forward
- 3. A circular disk of radius 3 m carries a uniformly distributed charge of 450n µC. Calculate the force on a 75- µC charge located on the z-axis of the disk and 4 meters from its center. See Figure 75 uC (0, 0, 4)arrow_forward5) Two small spheres are placed a distance 20 cm apart and have equal charge. How many excess electrons must be placed on each sphere if the magnitude of the Coulomb repulsive force is F = 3.33 x 102' N? a) 2 x 103; b) 350; c) 761; or d) 1.2 x 103.arrow_forward9. A Sodium (mass 23g, charge +11e) atom and an alpha particle (mass 4g, charge +2e) approach one another with the same initial speed v=106 m/s from an initially large distance. How close will these two particles get to one another before turning around? [Given, k=8.99x10° Nm²C² and qe= 1.6x10-19 C]arrow_forward
- 1. Two small identical conducting spheres have charges of 2.0x10-9C and -0.4x10-9C respectively (a) When placed 4cm apart, what is the force between them? (b) Calculate the dissociation (called ionization) energy, in units of electron volts, of a hydrogen atom if the electron is 0.5x10-10^m from the proton.arrow_forwardIn one model of the hydrogen atom, the electron revolves in a circular orbit of radius 5.3 x 10-11 m. Calculate the speed of the electron.arrow_forward1.How many coulombs of positive charge are there in 1.20 kg of plutonium, given that its atomic mass is 244 and each plutonium atom has 94 protons? ___c 2.Red blood cells can often be charged. Consider two red blood cells with the following charges: −22.2 pC and +53.8 pC. The red blood cells are 4.29 cm apart. (1 pC = 1 ✕ 10−12 C.) (a) What is the magnitude of the force on each red blood cell?____________ N(b) The red blood cells come into contact with each other and then are separated by 4.29 cm. What magnitude of force does each of the red blood cells now experience?____________ Narrow_forward
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