The ocean is a vast reservoir of kinetic energy, but it's also a challenging place to generate electricity. Which of these does NOT present a challenge when using wave energy to provide electrical energy?

A.)Waves are too inconsistent to be useful

B.)Salt water can corrode metal components

C.)Storms and forceful waves can damage power systems or loosen them from their moorings

D.)Barnacles and other sea creatures can cling to exposed surfaces, blocking intakes and weighing down machinery

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.