Dehydration is the excessive loss of fluids in the body. Low levels of calcium and potassium may also cause muscle cramps, since both minerals contribute to healthy muscle function. Low blood supply to your legs and feet can cause cramping in those areas when you exercise, walk, or participate in physical activities.
Physical properties of materials and systems can often be categorized as being either intensive or extensive quantities, according to how the property changes when the size (or extent) of the system changes. According to IUPAC, an intensive property is one whose magnitude is independent of the size of the system.
There are many types of physical properties. Commonly used examples include density, color, odor, hardness, and volume. Physical properties are further classified based on whether they are extensive or intensive. Extensive physical properties are those that are dependent on the amount of the substance present. Intensive physical properties are those that do not depend on the amount of the substance present. This means they will be the same whether you have one gram or one thousand kilograms of the substance. Density is a physical property that is determined by dividing the mass of a given amount of a substance by its volume. It is often reported in units of g/mL, which means 'grams per milliliter'. Density is an intensive property because the density of a pure substance will be the same no matter how much of it you have.