57:30 The equations are not balanced. Which equation would have the same coefficients in the same order as 2CO2 +
3H20 → C2H2O + 302?
O FeCl3 + NH4OH → Fe(OH)3 + NHACI
O CH4 + O2 → CO2 + H2O
O Fe + H2SO4 → Fe2(SO4)3 + H2
O PCI+ H2O → HCl + H3PO4

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