Answer:


Explanation:
<u>a)</u>
<u>Identify the unknown:  </u>
The charge and energy stored if the capacitors are connected in series  
<u>List the Knowns: </u>
Capacitance of the first capacitor:  = 2цF = 2 x 10-6 F
= 2цF = 2 x 10-6 F
Capacitance of the second capacitor  = 7.4цF  = 7.4 x 10-6 F
= 7.4цF  = 7.4 x 10-6 F
Voltage of battery: V = 9 V  
<u>Set Up the Problem:  
</u>
Capacitance of a series combination:  
 +............
+............

Capacitance of a series combination is given by: 

Then the charge stored in the series combination is:  

Energy stored in the series combination is:  

<u>Solve the Problem:  </u>

<u>b)</u>
<u>Identify the unknown:  </u>
The charge and energy stored if the capacitors are connected in parallel  
<u>Set Up the Problem:  </u>
Capacitance of a parallel combination: 


Capacitance of a parallel combination is given by

Then the charge stored in the parallel combination is

Energy stored in the parallel combination is:  

<u>Solve the Problem: </u><em>  </em>
