Formulating an investigative question
in this experiment, you need to
examine the idea of thermal energy
transfer. using a controlled
experiment, what might a good
question about the variables that
affect thermal energy transfer be?
thermal energy transfer depends on
many properties, but limit your
question to only two.

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.