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Unformatted text preview: mahmud (im4673) HW4 Mackie (20224) 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Two alpha particles (helium nuclei), each consisting of two protons and two neu- trons, have an electrical potential energy of 6 . 36 10 19 J . Given: k e = 8 . 98755 10 9 N m 2 / C 2 , q p = 1 . 6021 10 19 C , and g = 9 . 8 m / s 2 . What is the distance between these parti- cles at this time? Answer in units of m. 002 (part 1 of 2) 10.0 points An electric field does 11 J of work on a . 0004 C charge. What is the voltage change? Answer in units of V. 003 (part 2 of 2) 10.0 points The same electric field does 22 J of work on a . 0008 C charge. What is the voltage change? Answer in units of V. 004 10.0 points Two insulating spheres having radii 0 . 13 cm and 0 . 33 cm, masses 0 . 13 kg and 0 . 77 kg, and charges- 2 C and 2 C are released from rest when their centers are separated by 1 . 5 m . How fast is the smaller sphere moving when they collide? Answer in units of m / s. 005 10.0 points A uniform electric field of magnitude 264 V / m is directed in the positive x-direction. Sup- pose a 25 C charge moves from the origin to point A at the coordinates, (20 cm , 51 cm). x y 264 V / m O A (20 cm , 51 cm) What is the absolute value of the change in potential from the origin to point A ? Answer in units of V. 006 10.0 points A charged particle is connected to a string that is is tied to the pivot point P . The particle, string, and pivot point all lie on a horizontal table (consequently the figure...
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- Spring '08