A certain ohmic resistor has a resistance of 45 ohms. A second resistor is made of the same material but is three times as long and has a fourth the cross-sectional area. Part 1 What is the resistance of the second resistor

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?