A plece of solid copper, at 10°C, is dropped into a graduated cylinder of 100°C water. Which statement BEST describes the change in heat energy in this system?
4
Both water and copper temperatures decrease
B
The temperatures of both substances remain constant
Olate temperature Cresses coober temperature decreases
water temperature decreases coger temperaturecreases

Please help

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.