What is true of every water molecule? it is made of one hydrogen atom and two oxygen atoms. it is made of one water atom and one dna atom. it is made of two hydrogen atoms and one oxygen atom. it is made of two water atoms.

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.