What surrouds an electric current

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

What are two different ways you could find the value of a? explain these methods.