Consider the following instantaneous representation of a standing wave: ex = v3e, sin(bz) cos(wt), hy = -v3 cos(bz) sin(wt). as a function of z: a) calculate the instantaneous electric field energy density. [2 points] b) calculate the instantaneous magnetic field energy density. [2 points] c) what is the relationship between the instantaneous electric field energy density and the instantaneous magnetic field energy density? explain your answer. [2 points) d) calculate the instantaneous poynting vector. [2 points] e) calculate the instantaneous energy velocity. (use dimensional analysis to assist you in obtaining this expression if you do not remember it.)

The equation that describes a transverse wave on a string is y = (0.0120 m)sin[(927 rad/s)t - (3.00 rad/m)x] where y is the displacement of a string particle and x is the position of the particle on the string. the wave is traveling in the +x direction. what is the speed v of the wave?

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z