Physics
posted by Anonymous .
Two positive point charges are placed on the xaxis. One, of magnitude 4Q, is placed at the origin. The other, of magnitude Q is placed at x=3 m. Neither charge is able to move. Where on the xaxis in meters can I place a third positive point charge such that the magnitude of the net force on the third charge is zero?

A 1.6mole sample of an ideal gas is gently cooled at constant temperature 280 K. It contracts from initial volume 37 L to final volume V2. A total of 1.9 kJ of heat is removed from the gas during the contraction process. What is V2? Let the idealgas constant R = 8.314 J/(mol • K).

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