Capacitors c1=15uf and c2=23uf are each charged to 10v , then disconnected from the battery without changing the charge on the capacitor plates. The two capacitors are then connected in parallel, with the positive plate of C1 connected to the negative plate of C2 and vice versa. What is the potential difference across each capacitor? Express your answer using two significant figures. Enter your answers numerically separated by a comma.