Answer:
Milk is essentially a colloidal dispersion of fat in water. ... However, the fact remains that the fat and water components cannot be mixed together from a solution. There are therefore, two distinct immiscible liquid phase's present, which is why it is a heterogeneous mixture.
Robert A. Millikan and Harvey Fletcher performed the oil drop experiment.
Answer:
Pencil is an element and a heterogeneous mixture
Explanation:
