Show that if all components of any tensor of any rank vanish in one particular coordinate system they vanish in all coordinate system

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f