What must occur in order for matter to change states? a. other substances must be added. b. heat must be added or removed. c. the temperature must change. d. a chemical change must occur.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Select the three ways that the parallel-plate capacitor differs from a car battery.

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?