Why is cutting a piece of paper considered a PHYSICAL change? A- even though the paper is in smaller pieces, each piece is still paper
B- cutting the paper causes it to change to a different substance, such as coal

Aaspirin has a density of 1.40 g/cm^3 what is the volume in cubic centimeters of a tablet weighing 320 mg?

2. how is heavy water different from normal water

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.