Nonpolar molecules are the result of unequal electron pair sharing. true or false

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?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

The energy equivalent of the rest mass of an electron is