Since no camera has evergone outsideod the milkey wat how do we jnkw what it looks like?

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?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

It is really hard for me right know