How to calculate "save the children o

CodePudding user response:

CodePudding user response:

CodePudding user response:

Not for a long time study physics almost 8 years

CodePudding user response:

(1) that is the direction of the 4 a. How to look not to understand

CodePudding user response:

Really don't understand the circuit diagram, (1) the inside of the 4 a and 6 v felt directly short circuit