Unpolarized light with intensity s is incident on a series of polarizing sheets. the first sheet has its transmission axis oriented at 0°. a second polarizer has its transmission axis oriented at 45° and a third polarizer oriented with its axis at 90°. determine the fraction of light intensity exiting the third sheet with and without the second sheet present.

When a resistor with resistance r is connected to a 1.50-v flashlight battery, the resistor consumes 0.0625 w of electrical power. (throughout, assume that each battery has negligible internal resistance.) what power does the resistor consume if it is connected to a 12.6-v car battery? assume that r remains constant when the power consumption changes.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.