A 0.6 H inductor and a 30 ohm resistor are connectedins eries with a 12V battery. What is the time constant for this circuit

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy