An electron is positioned half-way between two infinite, parallel, conducting plates that are separated by 1 cm. the plates are attached to a 100 v power supply. the top plate at y= 1.0 cm is biased at 100 volts, and the bottom plate is biased at 0.0 volts. assume that the upward y-direction is positive, and that unit vectors describing the (x, y) coordinate system are (el, e2). calculate the magnitude, and direction, of the electric field acting between the two plates. a) e (1 x 1 0e2 v/m)e2; b) e =-(1 x 10e4 v/m)e2; c) e =-(500 v/m)e2; or d) e = (1 x 1 0e6 v/m)e2.

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?

Atomic nuclei of almost all elements consist of

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration