Explain the difference between reversible and irreversible

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

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?