Two small metal spheres are far from each other and are connected by a metal wire with a switch in the middle (all metal objects here are conductors).Initially the switch is open. Sphere 1, with radius 12 cm, is given a positive charge, 12C. Sphere 2, with radius 8.0 cm, is given a positive charge, 3.0C. Required:
What is the initial voltage of each sphere?

If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter increase? 1,024 64 16 4 256 submit answer

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?

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger