Dr. oops has done it again. his friend told him that to keep celery fresh, it should be placed in some tap water. dr. oops puts one stalk of celery in tap water. he places another stalk in his glass of clear, sugary soda by accident. what will happen to each stalk of celery?

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.