Aball of mass 5.0kg is lifted off the floor a distance of 1.7m. 1. what is the change in the gravitational potential energy of the ball? 2. now you release the ball from rest, and it falls to the floor. what is the kinetic energy of the ball just before it hits the floor? 3. what is the velocity of ball just before it hits the floor?

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?