A student pushes hard enough on a wall that she breaks a sweat. The wall, however, does not move (you can neglect the tiny amount it compresses). Does the student do any work on the wall? Answer using: 1. your intuition.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Select the three ways that the parallel-plate capacitor differs from a car battery.