Why when you rub two objects together they produce

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

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?

What happens to the vapor pressure of a substance when its surface area is increased at constant temperature?