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ch 10 hw 2

# ch 10 hw 2 - Ch10 HW2 f10 Page 1 of 4 WebAssign Ch10 HW2...

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Web Assign Ch10 HW2 f10 (Homework) Ashlyn Baum Physics 303K, section B, Fall 2010 Instructor: Jim Chelikowsky Current Score : 18 / 20 Due : Wednesday, November 17, 2010 11:30 PM CST 1. 2/2 points Question: MI3 10.1.X.010 In a collision between an electron and a hydrogen atom, it is useful to select both objects as the system because: Solution or Explanation During the collision, ext t = system 0 K + U is constant. However, the kinetic energy of the system may change. 2. 2/2 points Question: MI3 10.4.X.019 Consider a head-on elastic collision between two objects. Object 1, which has mass m 1 , is initially in motion, and collides head-on with object 2, which has mass m 2 , and is initially at rest. Which of the following statements about the collision are true? The due date for this assignment is past. Your work can be viewed below, but no changes can be made. During the time interval just before to just after the collision, external forces are negligible The sum of the final kinetic energies must equal the sum of the initial kinetic energies for a two-object system The forces the objects exert on each other are internal to the system and don't change the total momentum of the system The total momentum of the system does not change during the collision The kinetic energy of a two-object system is nearly zero

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ch 10 hw 2 - Ch10 HW2 f10 Page 1 of 4 WebAssign Ch10 HW2...

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