Iceland Flag and Description. The flag of Iceland was officially adopted on June 19, 1915. The cross design is modeled after the Danish flag. The color red is said to symbolize the island's active volcanoes; white the ice and snow that covers most of the country, and blue is symbolic of the surrounding Atlantic Ocean.
Rigidity, or resistance to movement, affects most patients and usually begins in the legs or neck. The affected muscles will remain tense and contracted, and some patients may feel pain as well as stiffness. Attempting to move the limb of a patient in Rigidity may lead to short, jerky movements called 'cog-wheeling'.
Flywheels have large moments of inertia to smooth out mechanical motion. This example is in a Russian museum. The moment of inertia, otherwise known as the angular mass or rotational inertia, of a rigid body is a tensor that determines the torque needed for a desired angular acceleration about a rotational axis. It depends on the body's mass distribution and the axis chosen, with larger moments requiring more torque to change the body's rotation.