You hear the siren of a police car approaching you from behind and you perceive the frequency as 1370~\mathrm{Hz}1370 Hz. When the police car continues past you, you perceive the frequency as 1330~\mathrm{Hz}1330 Hz. If you are driving at 33.8~\mathrm{m/s}33.8 m/s, what is the speed of the police car

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction