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.
Eggs are classified by weight by the dozen. Because of this, there will be slight variations in the weights of eggs in every carton. A dozen extra-large eggs weigh 27 oz. (about 2-1/4 oz. each on average), a dozen large eggs weigh 24 oz. (about 2 ounces each), and a dozen medium eggs weighs 21 oz. (about 1-3/4 oz.