Answer to Question #70965 in Physics for lovely2

Question

Imagine a thin wheel, which instead of wooden spokes, you used 6 rubber bands placed symmetrically about the axis of rotation. Each rubber spoke is stretched to a length of 30 cm. The mass of a rubber band was measured to be 10 g. The mass of the wheel was measured to be 1.5 kg. If you hang the wheel upright (hanging it by its axis), and then light up a matchstick or use a lighter to heat up a section of one rubber spoke (placed horizontally) 5 cm from the axis of rotation, the wheel will start to rotate.
Give a possible explanation as to why it should rotate.
Give a rough estimate of the amount of torque produced as the wheel is turning.