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Unformatted text preview: hernandez (ah29758) Homework 1 Hoffmann (56605) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points There are two identical small metal spheres with charges 70 . 7 C and- 62 . 8843 C. The distance between them is 2 cm. The spheres are placed in contact then set at their original distance. Calculate the magnitude of the force be- tween the two spheres at the final posi- tion. The value of the Coulomb constant is 8 . 98755 10 9 N m 2 / C 2 . Answer in units of N 002 10.0 points Charge Q is on the y axis a distance a from the origin and charge q is on the x axis a distance d from the origin. What is the value of d for which the x component of the force on q is the greatest? 1. d = q Q a 2 2. d = a 2 3. d = q Q 2 a 4. d = q Q a 5. d = 0 6. d = a 2 7. d = 2 a 8. d = a 9. d = q Q a 2 003 (part 1 of 2) 10.0 points A strong lightning bolt transfers about 22 . 06 C to Earth. How many electrons are transferred? The charge on an electron is- 1 . 602 10 19 C. 004 (part 2 of 2) 10.0 points The lightning bolt discharge lasts one mil- lisecond. What is the average current flowing from the cloud to ground? Answer in units of A 005 (part 1 of 2) 10.0 points Note that N/C = V/m Two charges are located on a horizontal axis....
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This note was uploaded on 09/01/2011 for the course PHY 303 taught by Professor Erskine/tsoi during the Spring '08 term at University of Texas at Austin.
- Spring '08