Two oscillating systems that you have studied are the block-spring and the simple pendulum. There is an interesting relation between them. Suppose that you have a weight on the end of a spring, and when the weight is in equilibrium, the spring is stretched a distance h. Show that the frequency of this block-spring system is the same as that of a simple pendulum whose length is h.

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?