6. The image to the right shows a moment of inertia demonstrator device. This device can spin its four arms
around its center. On each arm is a weight that can be
adjusted closer or farther from the center of rotation.
A student says, “Moving the weights away from the center
of mass does not change the moment of inertia, since the
total diameter of the device does not change." Do you
agree with this statement? Explain.

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.