Crumpling and tearing cause physical changes to a piece of paper. Which two characteristics of the paper change?
A. Size
B. Reactivity
I C. Identity
I D. Shape

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size and shape. only the appearance of the paper will have changed, but is reversible.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".