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##### Lehigh | PHYS Top Documents
• 2 Pages
###### Hw2

School: Lehigh

Physics 21 Fall, 2008 Solution to HW-2 21-1 Excess electrons are placed on a small lead sphere with a mass of m = 8.40 g so that its net charge is Q = 4.00 109 C. (a) Find the number of excess electrons on the sphere. (b)How many excess electrons

• 31 Pages
• ###### Lecture 3 1- 24-10 rev 012710
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###### Lecture 3 1- 24-10 Rev 012710

School: Lehigh

Course: Physics 21

Lecture-3 Chapter 22 Electric Fields Field: a spatial distribution of a physical quantity, e.g., the temperature field in Pennsylvania the magnetic field around the earth the electric field of a cell phone provider. 3/26/10 In principle, we can define the

• 1 Page
###### Hw15

School: Lehigh

Physics 21 Fall, 2008 Solution to HW-15 28-39 A long, straight, cylindrical wire of radius R carries a current uniformly distributed over its cross section. At what location is the magnetic eld produced by this current equal to half of its largest

• 31 Pages
###### Ch02

School: Lehigh

Course: Physics 1

CHAPTER 2 Motion in One Dimension 1* What is the approximate average velocity of the race cars during the Indianapolis 500? Since the cars go around a closed circuit and return nearly to the starting point, the displacement is nearly zero, and

• 24 Pages
###### Ch18F

School: Lehigh

Course: Physics 1

CHAPTER 19 Heat and the First Law of Thermodynamics 1* Body A has twice the mass and twice the specific heat of body B. If they are supplied with equal amounts of heat, CA = 4CB; TA = TB/4 how do the subsequent changes in their temperatures com

• 1 Page
###### Hw25

School: Lehigh

Course: INTRODUCTORY PHYSICS II

Physics 21 Fall, 2004 Solution to HW-25 34 P 5 How large is the image of the sun on the film used in a camera with (a) a 28 mm focal length lens, (b) a 50 mm focal length lens, and (c) a 200 mm focal length lens? The sun's diameter is 1.4 106 km,

• 2 Pages
###### Hw11

School: Lehigh

Physics 21 Fall, 2008 Solution to HW-11 27-35 A long wire carrying 4.50 A of current makes two 90 bends, as shown in the gure. The bent part of the wire passes through a uniform 0.248 T magnetic eld directed as shown in the gure and conned to a lim

• 2 Pages
###### Hw6

School: Lehigh

Physics 21 Fall, 2008 Solution to HW-6 Electric Fields and Equipotential Surfaces The dashed lines in the diagram represent cross sections of equipotential surfaces drawn in 1 volt increments. (a) What is the work WAB done by the electric force to

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