What is the value of work when a piston of volume 0.2 l expands against an external pressure of 200 kpa to a volume of 3.4 l? 640 j3.40 kj-640 j-3.40 kj

640 J

Explanation:

The work done by the piston when expanding is given by

where we have

is the pressure

is the change in volume of the gas inside the piston;

since we have

is the initial volume

is the final volume

The change in volume is

and so the work done is

answer; /// the above statement is (true);

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.