What starts chemical changes in foods?

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year