A great example of a physical boundary is a mountain. For example, the Pyrenees Mountains, which serve to separate France and Spain, are a physical boundary. So are the Ural Mountains which separate Europe and Asia. Along with mountains, oceans, seas, even deserts are examples of physical boundaries.
An average size apple weighs 6.4 ounces, which is equal to 180  grams. One apple contains approximately 91 calories and 3 grams of  dietary fiber.
A small, raw, unpeeled apple weighing just over 5 ounces provides 77 calories and 3.6 grams of fiber, an amount equivalent to about 14 percent of the daily value for fiber. Without skin, a small apple has 63 calories and just 1.7 grams of fiber, according to USDA data. Whole, unpeeled apples are a good source of both soluble and insoluble fiber. Apple skins are richest in the insoluble type, while approximately 80 percent of the fiber found in the fruitâs flesh is soluble. Because the skin is a more concentrated source of fiber than the flesh, however, the fiber ratio of a raw, unpeeled apple is about 30 percent soluble and 70 percent insoluble.