Which of the following is an engineering solution? A) Writing a report that explains the effects of pollution on our food sources. B) Manufacturing a drill that can be used to drill for energy sources at the bottom of the ocean. C) Tracking temperature changes over the past century. D) Producing data to show the diet commonalities of diabetics.

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".

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

they are all solids.