What is the internal resistance of a 12.0-v car battery whose terminal voltage drops to 9.0 v when the starter motor draws 75 a ?

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?