Atypical rate of deposit of dust ("dustfall") from unpolluted air was reported as 10 tons per square mile per month. (a) express this dustfall in milligrams per square meter per hour. (b) if the dust has an average density of 2 g/cm3, how long would it take to accumulate a layer of dust 1 mm thick?

Which is true of a liquid? it has a definite volume but not a definite mass. it has a definite mass but not a definite volume. it has a definite volume but not a definite shape. it has a definite shape but not a definite volume.

Astable atom that has a large nucleus most likely contains 1. more neutrons than protons. 2.more protons than neutrons. 3.equal numbers of protons and neutrons. 4.changing numbers of protons and neutrons.

Water is called the universal solvent because more substances dissolve in water than in any other chemical. this has to do with the polarity of each water molecule. the hydrogen side of each water (h2o) molecule carries a slight positive electric charge, while the oxygen side carries a slight negative electric charge.