February 27th, 2015
Formulas are on the last page
1. A lens of focal length 4cm is placed to the left of a lens with focal length -3cm. The spacing between the lenses is 5cm.
An object is placed 6cm to the left of the fi
(a) IDENTIFY: The potential energy is given by Eq. (21.17).
SET UP: [3(6) 2 f) - E = pEcos¢._ where Q is the angle betweenf) and E.
EXECUTE: parallel: in: O and U(0°) zipE
peipendicular: to: 90° and [1"(90'3) = 0
AU: U(90°) U(0°) =pE = (5.0 ><1
Online Homework 6 Solution
Resistance from Microscopic Ohm's law
Your task is to calculate the resistance of a simple cylindrical resistor
with wires connected to the ends, such as the carbon composition
resistors that are used on electronic circuit board