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.
The size of your apple influences its sugar content. A medium-sized apple, with a diameter of 3 inches, has about 19 grams of sugar, while a large apple has about 23 grams of sugar. If you favor small apples, expect to consume about 15 grams of sugar per fruit. A cup of apple slices has about 11 grams of sugar.