a rowboat heads due north at 5 m/s across a 50m wide stream flowing at 4 m/s east. what is its speed as viewed from the shore

Which statements best describe energy? check all that apply. the total amount of energy in the universe remains constant. the total amount of energy in the universe changes constantly. energy cannot be converted from one form to another. energy can be converted from one form to another. energy cannot be created or destroyed. energy can be created or destroyed.