Which is a physical property of milk? a. milk has a ph ranging from 6.4 to 6.8. b. milk spoils when left unrefrigerated over several days. c. milk boils at about 212°f (100°c). d. milk curdles when mixed with vinegar.

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.