Two point charges q 4.0 nC and q 6.0 nC are located on the x axis at x 3.0 cm and x 3.0 cm respectively a Find a position or positions on the x axis other than infinity where the electric potential is zero 2 b How much work is needed to bring a third charge q 2.0 nC from infinity to the point x 0 in the above set up 2 c When you have the third charge q 2.0 nC at the point x 0 and the other charges where they are what is the electric potential energy of the whole system of the three charges 3

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.