The food you eat is changed chemically and physically in the digestive system. When you eat a sandwich, which step in the digestion process is a physical change?

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests. which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

Which is true about metals used for jewelry, such as platinum and gold? a. they have low flammability. b. they have low reactivity. c. they have high flammability. d. they have high reactivity.