Aperson is standing motionless between a straight highway and an airport runway. a truck drives by the person at constant speed, while an airplane accelerated down the runway for take off. of the person, truck, and airplane, which are an inertial frame of reference? a. truck and airplane only b. person only c. person, truck, and airplane d. person and truck only

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?