Different between curable and incurable blindness along with their causes and cure, if possible.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

What is the coefficient of kinetic friction μk between the block and the tabletop?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell