A. A lightbulb expends 110 W of power when it is turned on. How much energy does it consume in one hour? Give your answer in kJ. B. A spring with a spring constant of 900 N/m is compressed from equilibrium by 10 cm over a time of 3 s by a force. What power did the force provide to the spring, in Watts? C. A crane uses 25 W of power to lift a 5 kg box at constant speed. How long did it take for the crane to raise the box a distance of 3 m? Give your answer in seconds.