Answer:
The EMF of each battery is 6 volts and the EMF of two batteries connected in series is 12 volts.
Explanation:
According to the Kirchhoff's Voltage Law, net voltage of a closed circuit must be zero. That is:
(1)
Where 
is the voltage of the i-th component of the closed circuit, measured in volts. Please notice that voltage for a power generating element (i.e. EMF) is less than zero and for a power consuming element is greater than zero (i.e. Batteries being charged by the EMF). In addition, if n-elements are connected in series, then the equivalent voltage is:
(2)
Let consider that closed system is formed by two batteries connected in series and an EMF, by (1) and (2) we have that:
(3)
If we know that 
, then the EMF of the battery is:
The EMF of each battery is 6 volts and the EMF of two batteries connected in series is 12 volts.
Dams on the main rivers in the region
It was then known as Persia
Because maybe if its hot in America if the air flow is going east than Europe will be warm.
