The leg pain produced by claudication is usually experienced as cramping in the thighs, calves, hips, and feet. The pain stops several minutes after the person rests, but returns when the person performs activities that use the leg muscles.
The definition of a solar panel is a group of silicon panels under a glass substrate. The glass substrate of a solar panel allows light to shine upon the silicon surface and produce electricity from the movement of electrons on the atomic level. Solar panels work in both a direct and a diffuse light manner.
Gravel in a freshwater aquarium. The substrate of an aquarium refers to the material used on the tank bottom. It can affect water chemistry, filtration, and the well-being of the aquarium's inhabitants, and is also an important part of the aquarium's aesthetic appeal.