Which of the following are always true of an object that is at equilibrium? Include all that apply. The object has an acceleration of zero.
The object has an acceleration of zero.
The object is moving and moving with a constant velocity
The sum of all the forces is 0 N.
There is no change in the object's velocity.
All the forces acting upon the object are equal.
The object is at rest.

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