Definite volume refers to something which has a consistent, unchanging volume, which in practical terms may mean a static mass and density, or a predetermined shape, either of which will dictate volume. A cube with side length l has a definite volume because it can only be exactly one size.
One cup of raw plantains or one medium sized raw plantain contains: ~180-200 calories, 0.5 g total fat, 47-50 g carbohydrates, 3.5 g dietary fiber, 22 g sugar and 2 g protein. Because of it's high carbohydrate content, you need to monitor your portion, otherwise your blood sugars will spike.
The list below is for cooked starchy vegetables. The serving sizes have about 15 grams of carbohydrate, 3 grams of protein, and about 80 calories. If you are eyeballing servings, 1/2 cup is equal to about the size of your cupped palm. One cup is about the size of your fist. 1  Beets (1 cup) 2  Carrots (1 cup) 3  Corn (1/2 cup or 1 medium cob) 4  Green Peas (1/2 cup) 5  Parsnips (1/2 cup) 6  Plantain (1/2 cup) 7  Pumpkin (1 cup) 8  Sweet Potatoes (1/2 cup) 9  Taro (1/2 cup) 10  White Potatoes (1 small or 1/2 cup mashed, 1/2 cup roasted or 10 to 15 French fries)