Acylinder of gas is compressed by a piston from an initial volume of 125 liters to a final volume of 90 liters. the compression occurs at a constant pressure, and the work done on the gas by the piston is 10^4 joules. what is the gas pressure during the compression ?

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?