Is it true that milk is water mixed with fat?
Milk is not just fat and water. What youre calling 'water' is actually whey. Whey is what is left when the milk fats and solids are curddled out. Whey is comprised of a mix of proteins, peptides (or protein segments), lactose (a type of sugar found only in milk), fat, salts and water. Whey protein powder is made from this.
Milk is made up of butterfat globules within a water- based fluid so yes you can say milk is made up of water and fats. The globules are composed of complex lipids like phosphiolids and proteins.
No, because, there are other substances. But if you take all the fat out, it's not just water